Dell EMC VMAX
Monitor Dell EMC Enterprise Storage
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Data Collection Setup
Metrics are collected via the REST API from the Unisphere system attached to the VMAX array.
Network Requirements
Port: 8443 (TCP) HTTPS to the REST API on the Unisphere system
Least Privileged User
A Unisphere user account with read-only permissions.
Supported Versions
Hardware Generations:
- VMAX2
- VMAX3
- VMAX AFA
API:
- Unisphere REST API 8.1+
Connection Parameters
| Name | Required? | Description |
|---|---|---|
| Host | Required | The EMC VMAX storage array to connect to. |
| Port | The port for communication to the EMC VMAX storage array. | |
| Username | Required | |
| Password | Required | |
| Collect Events | Controls whether events are collected and returned. | |
| Max Events | The maximum number of events to collect. | |
| Event Cutoff Time | Events before this time will not be collected. | |
| Exclude Events | A comma separated list of strings. Events will not be created when their message contains any of these strings. | |
| Symmetrix IDs Whitelist | A whitelist of symmetrix ID's to collect data from. | |
| Enable All Ciphers | Controls whether to enable all available SSL ciphers. | |
| Enable Volumes | Controls whether to collect volumes. | |
| Enable Front End Ports | Controls whether to collect front end ports. | |
| Enable Back End Ports | Controls whether to collect back end ports. | |
| Request Timeout (seconds) | The number of seconds to allow for the API to return a response. | |
| Thread Pool Size | Maximum number of threads used to perform collection. |
Metrics
Array
| Name | Description |
|---|---|
| Average LRU0 Fall-Through Time (Milliseconds) | The average time it takes a cache slot in LRU0 to be freed up. It is the average time from the first use of the contents to its reuse by another address. |
| Average ORM Size (Kilobytes per Second) | The average read size of the read requests performed directly from disks bypassing the cache. |
| Back End IO Rate (Operations per Second) | A data transfer of a read between the cache and the director. |
| Back End Reads (Operations per Second) | A data transfer of a read between the cache and the director. |
| Back End Request Rate (per Second) | A data transfer of a read or write between the cache and the director. |
| Back End Writes (Operations per Second) | A data transfer of a write between the cache and the director. |
| Boards | Number of Boards of the Array. |
| Cache Hit Rate (per Second) | The total requests from all FE directors per second that were satisfied from cache. |
| Cache Hit Ratio (%) | The percent of IO operations performed by all of the Symmetrix volumes, for which the read data was in cache and the write operation could be sent directly to cache without having to wait for data to be destaged from cache to the disks. |
| Cache Miss Ratio (%) | Cache Miss Ratio of the Array. |
| Device Count | The number of Device resources associated with this Array resource. |
| Device IO Rate (Operations per Second) | The number of host IO operations performed each second by all Symmetrix volumes, including writes and random and sequential reads. |
| Device Read Ratio (%) | The percent of total read IO operations performed each second by all of the Symmetrix volumes. |
| Device Write Ratio (%) | The percent of total write IO operations performed by all of the Symmetrix volumes. |
| Devices Write Pending Events Rate (per Second) | The number of times each second that the write-pending limit for a specific Symmetrix volume was reached. |
| Front End Read Requests Rate (Requests per Second) | A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate. |
| Front End Write Requests Rate (Requests per Second) | A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate. |
| Host IO Rate (Operations per Second) | Total Host IOPS of the Array. |
| Host IO Throughput (per Second) | The total requests from all FE directors per second that were satisfied from cache. |
| IO Latency (Milliseconds) | Combined Latency of the Array. |
| Local | Whether or not this Array is local to the endpoint we are collecting against. |
| Maximum Observed Host Throughput (Megabytes per Second) | Maximum Observed Host Throughput of the Array. |
| Maximum Observed Total Back End IO Rate (Operations per Second) | Maximum Observed Total Back End IOPS of the Array. |
| Maximum Observed Total Host IO Rate (Operations per Second) | Maximum Observed Total Host IOPS of the Array. |
| Microcode | The microcode ID for this Array resource. |
| Model | The model number of this Array resource. |
| ORM Rate (Operations per Second) | Number of read requests each second performed directly from disks bypassing the cache. |
| ORM Throughput (Megabytes per Second) | Number of host MBs read each second directly from disks bypassing the cache. |
| Prefetched Track Rate (per Second) | The tracks per second pre-fetched from disk to cache upon detection of a sequential read stream. |
| Read Cache Hit Rate (per Second) | The total read requests from all FE directors per second that were satisfied from cache. |
| Read Latency (Milliseconds) | The calculated system read response time. |
| Read Miss Rate (per Second) | Total read requests from all FE directors per second that were misses. A miss occurs when the requested read data is not found in cache. |
| Read Rate (Operations per Second) | The number of host read operations performed each second by all Symmetrix volumes. |
| Read Throughput (Megabytes per Second) | The number of host MBs read by all of the Symmetrix volumes each second. |
| Request Rate (Requests per Second) | A data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment, or both. The requests rate should be either equal to or greater than the IO rate. |
| Symmetrix Id | Symmetrix Id of the array this Array is a part of. |
| System Write Pending Event Rate (per Second) | The number of times each second that write activity was heavy enough to use up the system limit set for write tracks occupying cache. When the limit is reached, writes are deferred until data in cache is written to disk. |
| Total Cache Utilization (%) | The percent of system cache that is write pending. |
| Total Volume Capacity (Megabytes) | The total capacity (in MB) of all related Volumes. |
| Total Volume Used Space (Megabytes) | The total used space (in MB) of all related Volumes. |
| Write Cache Hit Rate (per Second) | The total write requests from all FE directors per second that were satisfied from cache. |
| Write Latency (Milliseconds) | The calculated system write response time. |
| Write Miss Rate (per Second) | The total write requests from all FE directors per second that were misses. A miss occurs when the write operation had to wait while data was destaged from cache to the disks. |
| Write Rate (Operations per Second) | The number of host write operations performed each second by all Symmetrix volumes. |
| Write Throughput (Megabytes per Second) | The number of host MBs written by all of the Symmetrix volumes each second. |
| Writes Pending | The number of system cache slots that are write pending. |
| Writes Pending Limit (%) | The percent of the target % at which writes are delayed. The range is from 40% to 80%. |
Back End Director
| Name | Description |
|---|---|
| Average System Call Time (Milliseconds) | The average time spent processing all system calls. |
| Busy Time Ratio (%) | The percent of time that a director is busy. |
| Compressed IO Throughput (Megabytes per Second) | The total size of compressed MBs (read and write) per second. |
| Compressed Read Request Rate (Operations per Second) | The number of compressed read requests per second. |
| Compressed Read Throughput (Megabytes per Second) | The size of compressed read MBs per second. |
| Compressed Requests | The total number of compressed requests (read and write) per second. |
| Compressed Write Request Rate (Operations per Second) | The number of compressed write requests per second. |
| Compressed Write Throughput (Megabytes per Second) | The size of compressed write MBs per second. |
| Core 0 Busy Time Ratio (%) | The total percent of time that core 0 is busy serving IOs. |
| Core 0 Non-IO Busy Time Ratio (%) | The total percent of time that core 0 is busy serving non-IO tasks. |
| Core 1 Busy Time Ratio (%) | The total percent of time that core 1 is busy serving IOs. |
| Core 1 Non-IO Busy Time Ratio (%) | The total percent of time that core 1 is busy serving non-IO tasks. |
| Director ID | Director ID of this Back End Director. |
| IO Rate (Operations per Second) | An IO command to the disk. |
| IO Throughput (Megabytes per Second) | The total IO (reads and writes) per second in MBs. |
| Maximum Observed IO Rate (Operations per Second) | Maximum Observed Combined IOPS of the Back End Director. |
| Maximum Observed IO Throughput (Megabytes per Second) | Maximum Observed Combined Throughput of the Back End Director. |
| Non-IO Busy Time Ratio (%) | The total percent of time that the DA is busy serving non-IO tasks. |
| Ports | The number of ports belonging to this director. |
| Prefetched Track Rate (per Second) | The number of tracks pre-fetched from disk to cache upon detection of a sequential read stream. |
| RDF System Call Rate (per Second) | The number of calls sent using RDF to a remote system. |
| Read Rate (Operations per Second) | A data transfer of a read between the director and the cache. |
| Read Throughput (Megabytes per Second) | The reads per second in MBs. |
| Relationship Reference | A reference to the Back End Director's children ports. |
| Remote System Call Rate (per Second) | The number of calls sent from the local director to another director in the same system. |
| Symmetrix Id | Symmetrix Id of the array this Back End Director is a part of. |
| System Call Rate (per Second) | The total number of calls seen by this director. |
| Write Rate (Operations per Second) | A data transfer of a write between the cache and the director. |
| Write Throughput (Megabytes per Second) | The writes per second in MBs. |
Back End Port
| Name | Description |
|---|---|
| Average IO Size | The average IO size served by the port. |
| Busy Time Ratio (%) | The percent of time the port is busy. |
| Cores | The number of cores belonging to this port. |
| Director ID | Director ID of this Back End Port. |
| Director Status | The current status of the port's director. |
| Hypers | The number of hypers belonging to this port. |
| Identifier | The port identifier. |
| IO Rate (Operations per Second) | An IO command to the disk. |
| IO Throughput (Megabytes per Second) | The total IO (reads and writes) per second in MBs. |
| Maximum Speed (Gigabits per Second) | The maximum speed of the port. |
| Port Group | The port group that this port belongs to. |
| Port ID | Port ID of this Back End Port. |
| Port Interface | The port interface. |
| Port Status | The current status of the port. |
| Read Rate (Operations per Second) | A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Read Throughput (Megabytes per Second) | The reads per second in MBs. |
| Speed (Gigabits per Second) | The speed of the port. |
| Symmetrix Id | Symmetrix Id of the array this Back End Port is a part of. |
| Symmetrix Port Key | The ID of the port's corresponding director and the ID of the port itself. |
| Type | The port type. |
| Write Rate (Operations per Second) | A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Write Throughput (Megabytes per Second) | The writes per second in MBs. |
Disk Group
| Name | Description |
|---|---|
| Average Read Size (Kilobytes) | The average number of kilobytes for a single read command. |
| Average Write Size (Kilobytes) | The average number of kilobytes for a single write command. |
| Busy Time Ratio (%) | The percent of time that the disk group is busy serving IOs. |
| Disk Group ID | Disk Group ID of this Disk Group. |
| Free Disk Capacity Ratio (%) | The percent of the disk group capacity that is free. |
| IO Density | The number of BE requests per GB of disk: (BE Reads + BE Writes) / allocated capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.) |
| IO Latency (Milliseconds) | The average time it took the disk group to service IO. |
| io_rate (Operations per Second) | The total number of read and write IOs per second. |
| IO Throughput (Megabytes per Second) | The total number of MBs per second for the disk group. |
| Maximum Observed Combined Throughput (Megabytes per Second) | Maximum Observed Combined Throughput of the Disk Group. |
| Maximum Observed IO Rate (Operations per Second) | Maximum Observed Combined IOPS of the Disk Group. |
| Read IO Rate (Operations per Second) | The number of reads per second for the disk group. |
| Read Latency (Milliseconds) | The average time it took the disk group to serve one read command. |
| Read Throughput (Megabytes per Second) | The read throughput (MBs) of the disk group per second. |
| SCSI Command Rate (Calls per Second) | The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the disk group each second. |
| Symmetrix Id | Symmetrix Id of the array this Disk Group is a part of. |
| Total Disk Capacity (Gigabytes) | The total capacity of all the disks in the disk group. |
| Used Disk Capacity (Gigabytes) | The total capacity allocated for all the disks in the disk group. |
| Used Disk Capacity Ratio (%) | The percent of the disk group capacity that is allocated. |
| Write Latency (Milliseconds) | The average time it took the disk group to serve one write command. |
| Write Rate (Operations per Second) | The number of writes per second for the disk group. |
| Write Throughput (Megabytes per Second) | The write throughput (MBs) of the disk group per second. |
FAST VP Policy
| Name | Description |
|---|---|
| FAST Policy ID | FAST Policy ID of this FAST VP Policy. |
| Storage Group ID | An array of associated storage groups. |
| Success | Whether or not the FAST VP Policy is successful. |
| Symmetrix Id | Symmetrix Id of the array this FAST VP Policy is a part of. |
| Tier 1 Capacity (%) | The percentage from Tier 1 that the FAST VP Policy is allowed to use at any given time. |
| Tier 1 ID | The ID of Tier 1. |
| Tier 2 Capacity (%) | The percentage from Tier 2 that the FAST VP Policy is allowed to use at any given time. |
| Tier 2 ID | The ID of Tier 2. |
| Tier 3 Capacity (%) | The percentage from Tier 3 that the FAST VP Policy is allowed to use at any given time. |
| Tier 3 ID | The ID of Tier 3. |
| Tier 4 Capacity (%) | The percentage from Tier 4 that the FAST VP Policy is allowed to use at any given time. |
| Tier 4 ID | The ID of Tier 4. |
| Tiers | The number of tiers associated with the FAST VP Policy. |
Front End Director
| Name | Description |
|---|---|
| Average ORM Size (Kilobytes) | The average read size of the read requests performed directly from disks bypassing the cache. |
| Average Queue Depth Range 8 | As an IO enters the queue it first checks how deep the queue is. Based on depth, the applicable queue depth bucket increments with the value seen by the IO. For example, an IO that encounters a queue depth of 7 will increment bucket #2 (depth 5-9 for OS or 7-14 for MF) by 7. The intent of these buckets is to identify IO bursts which in turn generate large queues and long response times. |
| Average Time Per System Call (Milliseconds) | The average time that it took to serve one system call. |
| Busy Time Ratio (%) | The percent of time the directory is busy. |
| Cache Hit Rate (per Second) | A request that is immediately serviced from the cache (instead of having to wait for the data to arrive, or destage from the disk.) |
| Cache Hit Ratio (%) | The percent of requests that are served from cache. |
| Cache Miss Rate (per Second) | A request that is a miss. |
| Cache Miss Ratio (%) | Cache Miss Ratio of the Front End Director. |
| Devices Write Pending Event Rate (per Second) | A write miss due to the volume write pending limit having been reached. |
| Director ID | Director ID of this Front End Director. |
| Host IO Throughput (Megabytes per Second) | The size of the data transfer from the host in MBs per second. |
| IO Latency (Milliseconds) | Total Latency of the Front End Director. |
| IO Rate (Operations per Second) | A host command for data transfer. |
| Maximum Observed Host Throughput (Megabytes per Second) | Maximum Observed Host Throughput of the Front End Director. |
| Maximum Observed IO Rate (Operations per Second) | Maximum Observed Combined IOPS of the Front End Director. |
| ORM Request Rate (Operations per Second) | Number of read requests each second performed directly from disks bypassing the cache. |
| ORM Throughput (Megabytes per Second) | Number of host MBs read each second directly from disks bypassing the cache. |
| Ports | The number of ports belonging to this director. |
| Quota IO Rate (Operations per Second) | The number of IOs per second that are executed by the director under IO quota limits. |
| Quota IO Throughput (Megabytes per Second) | The throughput in MBs that are transferred by the director under IO quota limits. |
| RDF System Call Rate (Calls per Second) | The number of calls per second sent via RDF to a remote system. |
| Read Cache Hit Rate (per Second) | A read request that is immediately serviced from the cache (instead of having to wait for the data to arrive from the disk.) |
| Read Cache Hit Ratio (%) | The percent of read requests that are served from cache. |
| Read Cache Miss Rate (per Second) | A read request that cannot be satisfied immediately from the cache and needs to wait for the data to arrive from the disk. |
| Read Latency (Milliseconds) | A calculated average response time for reads. |
| Read Rate (Operations per Second) | A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Read Ratio (%) | The percent of read requests out of host commands for data transfer. |
| Relationship Reference | A reference to the Front End Director's children ports. |
| Remote System Call Rate (Calls per Second) | The number of calls per second sent from the local director to another director in the same system. |
| Request Rate (Requests per Second) | The data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Slot Collision Rate (per Second) | A write miss due to the desired cache slot being locked by another request. |
| Symmetrix Id | Symmetrix Id of the array this Front End Director is a part of. |
| System Call Rate (Calls per Second) | The total number of calls seen by this director. |
| System Write Pending Event Rate (per Second) | A write miss due to the system write pending limit having been reached. |
| Total Read Rate (Operations per Second) | The total number of reads to the FE directors. |
| Total Write Rate (Operations per Second) | The total number of writes to the FE directors. |
| Write Cache Hit Rate (per Second) | A write request that is immediately serviced from the cache (instead of having to wait for the data to be destaged to the disk.) |
| Write Cache Hit Ratio (%) | The percent of write requests that were satisfied from cache. |
| Write Cache Miss Rate (per Second) | A write request that cannot be satisfied immediately from the cache and needs to wait for the data to be destaged to the disk. |
| Write Latency (Milliseconds) | A calculated average response time for writes. |
| Write Rate (Operations per Second) | A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Write Ratio (%) | The percent of write requests out of host commands for data transfer. |
Front End Port
| Name | Description |
|---|---|
| Average IO Size | The average IO size served by the port. |
| Busy Time Ratio (%) | The percent of time the port is busy. |
| Cores | The number of cores belonging to this port. |
| Director ID | Director ID of this Front End Port. |
| Director Status | The current status of the port's director. |
| Hypers | The number of hypers belonging to this port. |
| Identifier | The port identifier. |
| IO Rate (Operations per Second) | An IO command to the disk. |
| IO Throughput (Megabytes per Second) | The total IO (reads and writes) per second in MBs. |
| Port Group | The port group that this port belongs to. |
| Port ID | Port ID of this Front End Port. |
| Port Interface | The port interface. |
| Port Status | The current status of the port. |
| Read Rate (Operations per Second) | A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Read Throughput (Megabytes per Second) | The reads per second in MBs. |
| Symmetrix Id | Symmetrix Id of the array this Front End Port is a part of. |
| Symmetrix Port Key | The ID of the port's corresponding director and the ID of the port itself. |
| Type | The port type. |
| Write Rate (Operations per Second) | A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Write Throughput (Megabytes per Second) | The writes per second in MBs. |
Host Group
| Name | Description |
|---|---|
| Consistent LUN | Whether or not the LUN is consistent. |
| Host Group ID | Host Group ID of this Host Group. |
| Initiators | The number of initiators in the Host Group. |
| Port Flags Override Enabled | Whether or not the Port Flags Override is set. |
| Symmetrix Id | Symmetrix Id of the array this Host Group is a part of. |
| Type | The type of Host Group. |
Masking View
| Name | Description |
|---|---|
| Host Group ID | The ID of the host group associated with this masking view. |
| Masking View ID | Masking View ID of this Masking View. |
| Port Group ID | The ID of the port group associated with this masking view. |
| Storage Group ID | The ID of the storage group associated with this masking view. |
| Symmetrix Id | Symmetrix Id of the array this Masking View is a part of. |
Port Group
| Name | Description |
|---|---|
| Average IO Size | The average IO size served by the port. |
| Busy Time Ratio (%) | The percent of time the port is busy. |
| io_rate (Operations per Second) | An IO command to the disk. |
| IO Throughput (Megabytes per Second) | The total IO (reads and writes) per second in MBs. |
| Masking View | A list of associated Masking View resources associated with this Port Group resource.. |
| Masking Views | The number of Masking View resources associated with this Port Group resource. |
| Port Group ID | Port Group ID of this Port Group. |
| Ports | The number of Port resources associated with this Port Group resource. |
| Read Rate (Operations per Second) | A read data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Read Throughput (Megabytes per Second) | The reads per second in MBs. |
| Symmetrix Id | Symmetrix Id of the array this Port Group is a part of. |
| Symmetrix Port Key | The key port of this Port Group resource. |
| Type | The type of port for this Port Group resource. |
| Write Rate (Operations per Second) | A write data transfer between the director and the cache. An IO may require multiple requests depending on IO size, alignment or both. The requests rate should be either equal to or greater than the IO rate. |
| Write Throughput (Megabytes per Second) | The writes per second in MBs. |
SLO
| Name | Description |
|---|---|
| SLO ID | SLO ID of this SLO. |
| Storage Group ID | A list of Storage Group resource IDs that this SLO resource is associated with. |
| Storage Groups | The number of Storage Group resources that this SLO resource is associated with. |
| Symmetrix Id | Symmetrix Id of the array this SLO is a part of. |
| Workload ID | A list of workload IDs that are associated with this SLO resource. |
| Workloads | The number of workloads that are associated with this SLO resource. |
Storage Group
| Name | Description |
|---|---|
| Allocated Tracks | The total number of allocated tracks. |
| Average Back End Disk Time (Milliseconds) | The average time it takes cache to respond to a read request by the disk directors. |
| Average Back End Request Time (Milliseconds) | The average time it takes to make a request by the disk directors to the cache. |
| Average Back End Task Time (Milliseconds) | The time from the point when the HA puts the read request on the queue and the DA picks it up; this can be considered queue time. |
| Average IO Size (Kilobytes) | Calculated value: (HA Kbytes transferred per sec / total IOs per sec) |
| Average Read Size (Kilobytes) | Calculated value: (Kbytes read per sec/total reads per sec) |
| Average Write Size (Kilobytes) | Calculated value: (Kbytes written per sec/total writes per sec) |
| Back End IO Throughput (Megabytes per Second) | The number of MBs read per second + MBs written per second. |
| Back End Prefetched Track Rate (per Second) | The total prefetched tracks each second from the disk directors to the cache. |
| Back End Prefetched Track Used Rate (per Second) | The number of prefetched tracks used each second from the disk directors to the cache. |
| Back End Read Rate (Operations per Second) | The number of read requests each second performed by the disk directors to cache. |
| Back End Read Throughput (Megabytes per Second) | The number of MBs read by the disk directors from the disk each second. |
| Back End Write Rate (Operations per Second) | The number of write requests each second performed by the disk directors to cache. |
| Back End Write Throughput (Megabytes per Second) | The number of MBs written to the disk from the disk director each second. |
| Cache Hit Ratio (%) | The percent of IO operations that were immediately satisfied from cache. |
| Cache Miss Ratio (%) | The percent of IO operations that were not immediately satisfied from cache. |
| Cache Write Hit Rate (Operations per Second) | The host write operations performed each second by the group that were immediately satisfied from cache. |
| Capacity (Gigabytes) | The Capacity for this Storage Group. |
| Child Storage Group | The Child Storage Group for this Storage Group. |
| Child Storage Groups | The Number Of Child Storage Groups for this Storage Group. |
| Compressed Track Ratio (%) | The percent of tracks that are compressed. |
| Compressed Tracks | The total number of tracks that are compressed. |
| Device Block Size (Kilobytes) | The block size in KBs of the devices in this group. |
| Device Capacity (Gigabytes) | The capacity in GBs of this group. |
| Device Emulation | Device Emulation for this Storage Group |
| Fast Policy Name | The FAST Policy for this Storage Group. |
| IO Density | The number of backend reads and writes per GB of disk. |
| IO Latency (Milliseconds) | The average response time for the reads and writes. |
| IO Rate (Operations per Second) | The host operations performed each second by the group. |
| Masking View | The Masking View for this Storage Group. |
| Masking Views | The Number Of Masking Views for this Storage Group. |
| Maximum Observed Host Throughput (Megabytes per Second) | The Maximum Observed Throughput of the Storage Group. |
| Maximum Observed IO Rate (Operations per Second) | The Maximum Observed Combined IOPS of the Storage Group. |
| Maximum Write Pending Slots Available | The maximum number of write-pending slots available for the group. |
| ORM Average Size (Kilobytes) | The average read size of the read requests performed directly from disks bypassing the cache. |
| ORM Rate (Operations per Second) | Number of read requests each second performed directly from disks bypassing the cache. |
| ORM Throughput (Megabytes per Second) | Number of host MBs read each second directly from disks bypassing the cache. |
| Parent Storage Groups | The Number Of Parent Storage Groups for this Storage Group. |
| Prefetched Track IO Throughput (Megabytes per Second) | The number of MBs prefetched from disk to cache in a second. |
| Random IO | The number of IO operations that were random. |
| Random Read Hits | The number of random read IOs that were satisfied from the cache. |
| Random Read Misses | The number of random read IOs that were misses. |
| Random Reads | The number of read IO commands from a host not identified as part of a sequential stream. |
| Random Write Hits | The number of random write IOs that were immediately placed in cache because space was available. |
| Random Write Misses | The number of random write IOs that were misses. |
| Random Writes | The number of write IO commands from a host not identified as part of a sequential stream. |
| Read Cache Hit Ratio (%) | The percent of read operations, performed by the group, that were immediately satisfied by cache. |
| Read Cache Miss Ratio (%) | The percent of read miss operations performed each second by the group. A miss occurs when the requested read data is not found in cache. |
| Read Rate (Operations per Second) | The host read operations performed each second by the group. |
| Read Ratio (%) | The percent of IO operations that were reads. |
| Read Throughput (Megabytes per Second) | The cumulative number of host MBs read per second by the group. |
| Sampled RDF Write Latency (Milliseconds) | The summary of the read, write, and average response times for the selected SRDF/S group. |
| Sampled Read Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read IO for this group. |
| Sampled Read Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read miss IO for this group. |
| Sampled Write Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write IO for this group. |
| Sampled Write Pending Disconnect Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write miss IO for this group. |
| Sequential Cache Read Hit Rate (Operations per Second) | The number of sequential read operations performed each second by the group that were immediately satisfied from cache. |
| Sequential Cache Read Miss Rate (Operations per Second) | The number of sequential read operations performed each second by the group that were misses. |
| Sequential Cache Write Hit Rate (Operations per Second) | The number of sequential write operations performed each second by the group that were immediately satisfied from cache. |
| Sequential Cache Write Miss Rate (Operations per Second) | The number of sequential write operations performed each second by the group that were misses. |
| Sequential Cache Write Rate (Operations per Second) | The number of write IO operations performed each second that were sequential. |
| Sequential Read Rate (Operations per Second) | The number of read IO operations performed each second that were sequential. |
| SLO | The SLO for this Storage Group. |
| SLO Compliance | The SLO Compliance for this Storage Group. |
| Snapshots | The Number Of Snapshots for this Storage Group. |
| SRP | The SRP for this Storage Group. |
| Storage Group ID | Storage Group ID of this Storage Group. |
| Symmetrix Id | Symmetrix Id of the array this Storage Group is a part of. |
| Total Back End Request Rate (Requests per Second) | The number of read/write requests each second performed by the disk directors to cache |
| Total Cache Hit Rate (Operations per Second) | The host read/write operations performed each second by the group that were immediately satisfied from cache. |
| Total Cache Miss Rate (Operations per Second) | The number of host read/write operations performed each second by the group that could not be satisfied from cache. |
| Total IO Throughput (Megabytes per Second) | The cumulative number of host MBs read/writes per second by the group. |
| Total Sequential IO Rate (Operations per Second) | The number of IO operations performed each second that were sequential. |
| Type | The Type for this Storage Group. |
| Volumes | The Number Of Volumes for this Storage Group. |
| Workload | The Workload for this Storage Group. |
| Write Cache Hit Ratio (%) | The percent of write operations, performed by the group, that were immediately satisfied by cache. |
| Write Cache Miss Rate (Operations per Second) | The host write operations performed each second by the group that were not satisfied from cache. |
| Write Miss Ratio (%) | The percent of write miss operations performed each second by the group. A miss occurs when the write operation had to wait while data was destaged from cache to the disks. |
| Write Paced Delay (Milliseconds) | The total delay in milliseconds that the RDF directors impose on RDF devices in order to better serve remote IOs. |
| Write Paced Latency (Milliseconds) | The average time in milliseconds that host writes on RDF devices are delayed by the RDF directors. |
| Write Rate (Operations per Second) | The host write operations performed each second by the group. |
| Write Ratio (%) | The percent of IO operations that were writes. |
| Write Throughput (Megabytes per Second) | The cumulative number of host MBs written per second by the group. |
| Writes Pending | The number of tracks currently in write pending mode for the group. |
Storage Resource Pool
| Name | Description |
|---|---|
| Back End IO Throughput (Megabytes per Second) | The number of MBs read per second + MBs written per second. |
| Back End Read Requests Rate (Requests per Second) | The number of read requests each second performed by the disk directors to cache. |
| Back End Read Throughput (Megabytes per Second) | The number of MBs read by the disk directors from the disk each second. |
| Back End Requests Rate (Requests per Second) | The number of read/write requests each second performed by the disk directors to cache. |
| Back End Write Requests Rate (Requests per Second) | The number of writes requests each second performed by the disk directors to cache. |
| Back End Write Throughput (Megabytes per Second) | The number of MBs written to the disk from the disk director each second. |
| Description | A description of the SRP. |
| Disk Group ID | A list of disk group ID's associated with the SRP. |
| Disk Groups | The number of disk groups associated with the SRP. |
| Emulation | The SRP's emulation. |
| Host IO Rate (Operations per Second) | The total number of read and write IOs per second. |
| Host Read Rate (Operations per Second) | The number of reads per second for the SRP. |
| Host Read Throughput (Megabytes per Second) | The reads per second in MBs. |
| Host Write Rate (Operations per Second) | The number of writes per second for the SRP. |
| Host Write Throughput (Megabytes per Second) | The writes per second in MBs. |
| IO Latency (Milliseconds) | The average time it takes to satisfy IO requests. |
| Maximum Observed Host IO Rate (Operations per Second) | Maximum Observed Host Combined IOPS of the Storage Resource Pool. |
| Maximum Observed Host IO Throughput (Megabytes per Second) | Maximum Observed Host Throughput of the Storage Resource Pool. |
| Read Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read IO for this group. |
| Remote Replica Group DSE | Whether or not the SRP is usable by Remote Replica Group (RDFA) DSE. |
| Reserved Capacity Ratio (%) | The amount of capcity that is reserved on the SRP. |
| SRP ID | SRP ID of this Storage Resource Pool. |
| SRP SLO Demand ID | A list of SLO demand ID's associated with the SRP. |
| SRP SLO Demands | The number of SRP SLO demands. |
| SRP Storage Group Demand ID | A list of storage group demand ID's associated with the SRP. |
| SRP Storage Group Demands | The number of SRP SG demands. |
| Symmetrix Id | Symmetrix Id of the array this Storage Resource Pool is a part of. |
| Total Allocated Capacity (Gigabytes) | The total allocated capacity of the SRP. |
| Total Host IO Throughput (Megabytes per Second) | Cumulative number of host MBs read/writes per second by the SRP. |
| Total Snapshot Allocated Capacity (Gigabytes) | The total snapshot allocated capcity of the SRP. |
| Total SRDF DSE Allocated Capacity (Gigabytes) | The total SRDF DSE allocated capacity of the SRP. |
| Total Subscribed Capacity (Gigabytes) | The total subscribed capacity of the SRP. |
| Total Usable Capacity (Gigabytes) | The total usable capacity of the SRP. |
| Write Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write IO for this group. |
Storage Tier
| Name | Description |
|---|---|
| Average Read Size (Kilobytes) | The average number of kilobytes for a single read command. |
| Average Write Size (Kilobytes) | The average number of kilobytes for a single write command. |
| Disk Busy Time Ratio (%) | The percent of time that the disk is busy serving IOs. |
| Free Capacity Ratio (%) | The percent of the disk capacity that is free. |
| Host Read Rate (Operations per Second) | The number of reads per second for the disk. |
| Host Write Rate (Operations per Second) | The number of writes per second for the disk. |
| IO Density | The number of BE requests per GB of disk. (Reads + Writes) / total capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.) |
| IO Latency (Milliseconds) | Calculated value: (Total Read Time/sec + Total Write Time/sec) / (Reads/sec + Writes/sec) |
| IO Rate (Operations per Second) | The total number of read and write IOs per second. |
| IO Throughput (Megabytes per Second) | The total MBs read and written per second. |
| Read Latency (Milliseconds) | The average time it took the disk to serve one read command. |
| Read Throughput (Megabytes per Second) | The read throughput (MBs) of the disk per second. |
| Symmetrix Id | Symmetrix Id of the array this Storage Tier is a part of. |
| Tier ID | Tier ID of this Storage Tier. |
| Total Disk Capacity (Gigabytes) | The total capacity of the disk in GBs. |
| Total SCSI Command Rate (Calls per Second) | The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the Symmetrix disk each second. |
| Used Capacity Ratio (%) | The percent of the disk capacity that is used. |
| Used Disk Capacity (Gigabytes) | The used capacity of the disk in GBs. |
| Write Latency (Milliseconds) | The average time it took the disk to serve one write command. |
| Write Throughput (Megabytes per Second) | The write throughput (MBs) of the disk per second. |
Thin Pool
| Name | Description |
|---|---|
| Allocated Pool Capacity (Gigabytes) | The number of GBs of the virtual pool that are allocated. |
| Allocated Ratio (%) | The percent allocated on this Thin Pool. |
| Allocated Tracks | The total number of tracks of the virtual pool. |
| Average ORM Size (Kilobytes) | The average read size of the read requests performed directly from disks bypassing the cache. |
| Back End IO Latency (Milliseconds) | The average time it took the disk to service IO (DATA pool). |
| Back End IO Throughput (Megabytes per Second) | Calculated value: (MBs read per sec + MBs written per sec). |
| Back End Read Latency (Milliseconds) | The average time it took the disk to serve one read command (DATA pool). |
| Back End Read Ratio (%) | The percent of the back-end IO that were read requests. |
| Back End Read Request Rate (Operations per Second) | The number of read requests each second performed by the disk directors to cache. |
| Back End Read Throughput (Megabytes per Second) | The number of MBs read by the disk directors from the disk each second. |
| Back End Total Request Rate (Requests per Second) | The number of read/write requests each second performed by the disk directors to cache. |
| Back End Write Latency (Milliseconds) | The average time it took the disk to serve one write command (DATA pool). |
| Back End Write Ratio (%) | The percent of the back-end IO that were write requests. |
| Back End Write Request Rate (Operations per Second) | The number of write requests each second performed by the disk directors to cache. |
| Back End Write Throughput (Megabytes per Second) | The number of MBs written to the disk from the disk director each second. |
| Bound Thin Volume | Bound Thin Volume of this Thin Pool. |
| Bound Thin Volumes | Number of Bound Thin Volumes on this Thin Pool. |
| Compressed Track Ratio (%) | The percent of compressed tracks in a virtual pool. |
| Disabled Data Volume Count | Number Of disabled Data Volumes on this Thin Pool. |
| Disabled Data Volumes | List of disabled Data Volumes of this Thin Pool. |
| Disk Group | Disk Group that this Thin Pool belongs to. |
| Disk Technology | Disk technology of this Thin Pool. |
| Egress Tracks | The number of tracks leaving the pool. |
| Emulation | Emulation of this Thin Pool. |
| Enabled Data Volumes | List of enabled Data Volumes of this Thin Pool. |
| Enabled Data Volumes Count | The number of enabled Data Volumes on this Thin Pool. |
| Enabled Pool Capacity (Gigabytes) | The capacity of the virtual pool that is enabled. |
| Enabled Space (Gigabytes) | Enabled space on this Thin Pool. |
| Free Space (Gigabytes) | Free space on this Thin Pool. |
| Ingress Tracks | The number of tracks entering the pool. |
| Maximum Observed Back End Throughput (Megabytes per Second) | Maximum Observed Back End Throughput of the Thin Pool. |
| Maximum Observed Total Back End IO Rate (Operations per Second) | Maximum Observed Back End IOPS of the Thin Pool. |
| ORM Count (Requests per Second) | Number of read requests each second performed directly from disks bypassing the cache. |
| ORM Throughput (Megabytes per Second) | Number of host MBs read each second directly from disks bypassing the cache. |
| Pool ID | Pool ID of this Thin Pool. |
| RAID | The RAID type of this Thin Pool. |
| RDFS Write Latency (Milliseconds) | The average time that it took the Symmetrix RDF/S to serve one write IO for this pool. |
| Read Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read miss IO for this pool. |
| Subscription Ratio (%) | The percent subscription of this Thin Pool. |
| Symmetrix Id | Symmetrix Id of the array this Thin Pool is a part of. |
| Total Back End IO Rate (Operations per Second) | Total Back End IOPS of the Thin Pool. |
| Total Free (Gigabytes) | Total free space of the Thin Pool. |
| Total Pool Capacity (Gigabytes) | The total capacity of the virtual pool. |
| Total Space (Gigabytes) | Total space on this Thin Pool. |
| Total Subscribed (Gigabytes) | Total subscribed of the Thin Pool. |
| Used Capacity Ratio (%) | The percent of the pools capacity that is used. |
| Used Pool Capacity (Gigabytes) | The capacity of the virtual pool that is used. |
| Used Space (Gigabytes) | The used space on this Thin Pool. |
| Write Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write miss IO for this pool. |
Thin Tier
| Name | Description |
|---|---|
| Allocated Pool Capacity (Gigabytes) | The number of GBs of the virtual pool that are allocated. |
| Allocated Tracks | The total number of tracks of the virtual pool. |
| Back End IO Latency (Milliseconds) | The average time it took the disk to service IO (DATA pool). |
| Back End IO Throughput (Megabytes per Second) | The number of MBs read per second + MBs written per second. |
| Back End Read Latency (Milliseconds) | The average time it took the disk to serve one read command (DATA pool). |
| Back End Read Ratio (%) | The percent of the back-end IO that were read requests. |
| Back End Read Request Rate (Requests per Second) | The number of read requests each second performed by the disk directors to cache. |
| Back End Read Throughput (Megabytes per Second) | The number of MBs read by the disk directors from the disk each second. |
| Back End Request Latency (Milliseconds) | The average time it takes to make a request by the disk directors to cache. |
| Back End Write Latency (Milliseconds) | The average time it took the disk to serve one write command (DATA pool). |
| Back End Write Ratio (%) | The percent of the back-end IO that were write requests. |
| Back End Write Request Rate (Requests per Second) | The number of write requests each second performed by the disk directors to cache. |
| Back End Write Throughput (Megabytes per Second) | The number of MBs written to the disk from the disk director each second. |
| Compressed Track Ratio (%) | The percent of compressed tracks in a virtual pool. |
| Compressed Tracks | The number of compressed tracks of the virtual pool. |
| Egress Tracks | The number of tracks leaving the pool. |
| Enabled Pool Capacity (Gigabytes) | The capacity of the virtual pool that is enabled. |
| Ingress Tracks | The number of tracks entering the pool. |
| RDFS Write Latency (Milliseconds) | The average time that it took the Symmetrix RDF/S to serve one write IO for this pool. |
| Read Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read miss IO for this pool. |
| Symmetrix Id | Symmetrix Id of the array this Thin Tier is a part of. |
| Tier ID | Tier ID of this Thin Tier. |
| Total Back End Request Rate (Requests per Second) | The number of read/write requests each second performed by the disk directors to cache. |
| Total Pool Capacity (Gigabytes) | The total capacity of the virtual pool. |
| Used Capacity Ratio (%) | The percent of the pools capacity that is used. |
| Used Pool Capacity (Gigabytes) | The capacity of the virtual pool that is used. |
| Write Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write miss IO for this pool. |
Tier
| Name | Description |
|---|---|
| Allocated Pool Capacity (Gigabytes) | The number of GBs of the virtual pool that are allocated. |
| Allocated Tracks | The total number of tracks of the virtual pool. |
| Average Read Size (Kilobytes) | The average number of kilobytes for a single read command. |
| Average Write Size (Kilobytes) | The average number of kilobytes for a single write command. |
| Back End IO Latency (Milliseconds) | The average time it took the disk to service IO (DATA pool). |
| Back End IO Throughput (Megabytes per Second) | The number of MBs read per second + MBs written per second. |
| Back End Read Latency (Milliseconds) | The average time it took the disk to serve one read command (DATA pool). |
| Back End Read Ratio (%) | The percent of the back-end IO that were read requests. |
| Back End Read Request Latency (Milliseconds) | The average time it takes to make a request by the disk directors to cache. |
| Back End Read Request Rate (Requests per Second) | The number of read requests each second performed by the disk directors to cache. |
| Back End Read Throughput (Megabytes per Second) | The number of MBs read by the disk directors from the disk each second. |
| Back End Write Latency (Milliseconds) | The average time it took the disk to serve one write command (DATA pool). |
| Back End Write Ratio (%) | The percent of the back-end IO that were write requests. |
| Back End Write Request Rate (Requests per Second) | The number of write requests each second performed by the disk directors to cache. |
| Back End Write Throughput (Megabytes per Second) | The number of MBs written to the disk from the disk director each second. |
| Compressed Track Ratio (%) | The percent of compressed tracks in a virtual pool. |
| Compressed Tracks | The number of compressed tracks of the virtual pool. |
| Disk Busy Time Ratio (%) | The percent of time that the disk is busy serving IOs. |
| Disk Capacity Used Ratio (%) | The percent of the disk capacity that is used. |
| Disk Groups | Number of Disk Groups associated with this Tier. |
| Egress Tracks | The number of tracks leaving the pool. |
| Enabled Pool Capacity (Gigabytes) | The capacity of the virtual pool that is enabled. |
| Excess Space (Gigabytes) | Excess space on this Tier. |
| FAST Free Space (Gigabytes) | FAST free space on this Tier. |
| FAST Usage (Gigabytes) | FAST usage of this Tier. |
| Free Capacity (Gigabytes) | Free capacity on this Tier. |
| Free Disk Capacity Ratio (%) | The percent of the disk capacity that is free. |
| Host Read Rate (Operations per Second) | The number of reads per second for the disk. |
| Host Write Rate (Operations per Second) | The number of writes per second for the disk. |
| Ingress Tracks | The number of tracks entering the pool. |
| IO Density | The number of BE requests per GB of disk. (Reads + Writes) / total capacity. With FAST moving active extents to higher tiers, this metric is a good indication of success (the IO density on Flash tiers should be higher than the density on SATA tiers.) |
| IO Latency (Milliseconds) | Calculated value: (Total Read Time/sec + Total Write Time/sec) / (Reads/sec + Writes/sec) |
| IO Rate (Operations per Second) | The total number of read and write IOs per second. |
| IO Throughput (Megabytes per Second) | The total MBs read and written per second. |
| Maximum Storage Group Demand (Gigabytes) | Maximum SG demand on this Tier. |
| Pool Capacity Used Ratio (%) | The percent of the pools capacity that is used. |
| RDFS Write Latency (Milliseconds) | The average time that it took the Symmetrix RDF/S to serve one write IO for this pool. |
| Read Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one read miss IO for this pool. |
| Read Latency (Milliseconds) | The average time it took the disk to serve one read command. |
| Read Throughput (Megabytes per Second) | The read throughput (MBs) of the disk per second. |
| Symmetrix Id | Symmetrix Id of the array this Tier is a part of. |
| Technology | Technology of this Tier. |
| Thin Pool Count | Number of Thin Pools on this Tier. |
| Thin Pools | List of Thin Pools on this Tier. |
| Tier ID | Tier ID of this Tier. |
| Total Back End Request Rate (Requests per Second) | The number of read/write requests each second performed by the disk directors to cache. |
| Total Capacity (Gigabytes) | Total capacity of this Tier. |
| Total Disk Capacity (Gigabytes) | The total capacity of the disk in GBs. |
| Total Pool Capacity (Gigabytes) | The total capacity of the virtual pool. |
| Total SCSI Command Rate (Calls per Second) | The total number of read commands, write commands, skip mask commands, verify commands, XOR write commands, and XOR write-read commands performed by the Symmetrix disk each second. |
| Type | Type of this Tier. |
| Used Capacity (Gigabytes) | Used capacity of this Tier. |
| Used Disk Capacity (Gigabytes) | The used capacity of the disk in GBs. |
| Used Pool Capacity (Gigabytes) | The capacity of the virtual pool that is used. |
| Write Cache Miss Latency (Milliseconds) | The average time that it took the Symmetrix to serve one write miss IO for this pool. |
| Write Latency (Milliseconds) | The average time it took the disk to serve one write command. |
| Write Throughput (Megabytes per Second) | The write throughput (MBs) of the disk per second. |
Unisphere for VMAX Connection
| Name | Description |
|---|---|
| Host | The Unisphere for VMAX API Host. |
| Version | The version of the Unisphere API. |
Volume
| Name | Description |
|---|---|
| Allocated Ratio (%) | Percent allocated. |
| Capacity (Megabytes) | The capacity of this volume (MB). |
| Capacity Cylinders | The capacity of the volume's cylinders. |
| Emulation | The volume's emulation. |
| Encapsulated | Whether or not the volume is encapsulated. |
| Front End Paths | The number of front end paths on the volume. |
| Identifier | The volume identifier. |
| Physical Name | The physical name of the volume. |
| Pinned | Whether or not the volume is pinned. |
| Reserved | Whether or not the volume is reserved. |
| SSID | The SSID associated with the volume. |
| Status | The status of the volume. |
| Storage Group ID | An array of associated storage groups. |
| Storage Groups | The number of storage groups associated with the volume. |
| Symmetrix Id | Symmetrix Id of the array this Volume is a part of. |
| Symmetrix Port Key | An array of associated symmetrix ports. |
| Type | The volume's type. |
| Used Space (Megabytes) | Used space (in megabytes) on the Volume resource. |
| Volume ID | Volume ID of this Volume. |
| WWN | The volume's WWN |
Updated over 1 year ago