Storage Container metrics

Table 1. Storage container metrics
Metric	Description
% Hit	The percent of I/O operations that were immediately satisfied from cache
% Miss	The percent of I/O operations that were misses
% Random IO	The percent of I/O operations that were random.
% Random Read Hit	Calculated value: 100 * (random read hits per sec/total I/O operations per sec).
% Random Read Miss	Calculated value: 100 * (random read misses per sec/total I/O operations per sec).
% Random Reads	The percent of all read I/Os that were random.
% Random Write Hit	Calculated value: 100 * (random write hits per sec/total I/O operations per sec).
% Random Write Miss	Calculated value: 100 * (random write misses per sec/total I/O operations per sec).
% Random Writes	The percent of all write I/O operations per second that were random.
% Read Hit	The percent of read operations, performed by the group, that were immediately satisfied by cache
% Read Miss	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.
% Reads	The percent of I/O operations that were reads
% Seq Read	Calculated value: 100 * (seq reads per sec/total I/Os per sec).
% Seq Read Hit	The percent of the sequential read operations that were immediately satisfied from cache
% Seq Read Miss	The percent of the sequential read operations that were misses
% Seq Write Hit	The percent of the sequential write operations that were immediately satisfied from cache
% Seq Write Miss	The percent of the sequential write operations that were misses
% Seq Writes	Calculated value: 100*(seq writes per sec/total I/Os per sec) (V4).
% Sequential IO	The percent of I/O operations that were sequential
% Write Hit	The percent of write operations, performed by the group, that were immediately satisfied by cache.
% Write Miss	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.
% Writes	The percent of I/O operations that were writes
Allocated Capacity	The total allocated storage group capacity
Async MBs Sent/sec	The number of async MBs sent per second using this storage group (V3)
Async Write Reqs/sec	The number of async write requests managed by this storage group per second (V3).
Avg IO Size	Calculated value: (HA Kbytes transferred per sec /total I/Os per sec)
Avg Read Size	Calculated value: (Kbytes read per sec/total reads per sec)
Avg Write Size	Calculated value: (Kbytes written per sec/total writes per sec)
Avg. Write Paced Delay (ms)	Average write paced delay (V3).
BE % Reads	The percent of the back-end I/O that were read requests
BE % Writes	The percent of the back-end I/O that were write requests
BE Optimize Write Throughput	Internal metric
BE Partial Sector Writes (KB)	The KBs of back-end I/O that were partial sector writes (V3)
BE Prefetched Throughput	The number of tracks per second prefetched from disk to cache upon detection of a sequential read stream
BE Prefetched Tracks Used/sec	The number of prefetched tracks used each second from the disk directors to the cache
BE Prefetched Tracks/sec	Total prefetched tracks each second from the disk directors to the cache.
BE RDF Copy	Internal metric (V3)
BE RDF Copy (MB)	Internal metric (V3)
BE Read Reqs/sec	The number of read requests each second performed by the disk directors to cache.
BE Reads For Copy/sec	Internal metric
BE Reqs/sec	The number of read/write requests each second performed by the disk directors to cache.
BE Throughput Read	BE Throughput Read (V3)
BE Throughput Read For Copy	BE Throughput Read For Copy
BE Throughput Transferred	BE Throughput Transferred
BE Throughput Written	BE Throughput Written (V3)
BE Throughput Written For Copy	BE Throughput Written For Copy
BE Throughput Written For Rebuild	BE Throughput Written For Rebuild
BE Write Reqs/sec	The number of write requests each second performed by the disk directors to cache.
BE Writes For Copy/sec	Internal metric
BE Writes For Rebuild/sec	Internal metric
Critical Alert Count	Number of critical alerts
Device Block Size	The block size of the volume
External Read RT	The time it takes to process a read outside of the system (V4)
External Response Time	The time it takes to process an IO request outside of the system (V4)
External Write RT	The time it takes to process a write outside of the system (V4)
Host Hits/sec	The number of host read/write operations performed each second by the group that were immediately satisfied from cache.
Host IO Limit % Time Exceeded	Host I/O Limit percentage time exceeded (V4)
Host IO Limit IOs/sec	The number of I/O operations per second the FE port is processing on behalf of the specific storage group.
Host IO Limit Throughput	The number of MBs the FE port is processing on behalf of the specific storage group.
Host IO Limit Time Exceeded	The number of I/O operations per second the FE port is performing on behalf of the specific storage group.
Host IOs/sec	The number of host operations performed each second by the group
Host Misses/sec	The number of host read/write operations performed each second by the group that could not be satisfied from cache
Host Read Hits/sec	The number of host read operations performed each second by the group that were immediately satisfied from cache.
Host Read Misses/sec	The number of host read operations performed each second by the group that were not satisfied from cache.
Host Reads/sec	The number of host read operations performed each second by the group.
Host Throughput	The cumulative number of host MBs read/writes per second by the group
Host Throughput Read	The cumulative number of host MBs read per second by the group
Host Throughput Written	The cumulative number of host MBs written per second by the group
Host Write Hits/sec	The number of host write operations performed each second by the group that were immediately satisfied from cache.
Host Write Misses/sec	The number of host write operations performed each second by the group that were not satisfied from cache.
Host Writes/sec	The number of host write operations performed each second by the group.
Information Alert Count	Number of information alerts
Internal Read RT	The time it takes to process a read inside of the system (V4)
Internal Response Time	The time it takes to process an IO request inside of the system (V4)
Internal Write RT	The time it takes to process a write inside of the system (V4)
IO Density	The number of BE requests per GB of disk
Max WP Capacity Threshold	The capacity of the maximum number of write-pending slots available
Max WP Threshold	The maximum number of write-pending slots available for the group
Random IOs/sec	I/O operations per second from a host that is not identified as part of a sequential stream
Random Read Hits/sec	Random read I/O operations per second that were satisfied from the cache (V3)
Random Read Misses/sec	Random read I/O operations per second that were misses
Random Reads/sec	Read I/O commands from a host that is not identified as part of a sequential stream.
Random Write Hits/sec	Random write I/O operations per second that were immediately placed in cache because space was available.
Random Write Misses/sec	Random write I/O operations per second that were misses.
Random Writes/sec	Write I/O commands from a host that is not identified as part of a sequential stream.
RDF MBs Read/sec	SRDF MBs read per second (V3)
RDF MBs Written/sec	SRDF MBs written per second (V3)
RDF Reads/sec	SRDF reads per second (V3).
RDF Response Time (ms)	The SRDF round-trip time - the metric is calculated as follows : SRDF Accumulated Service Time / (SRDF Reads/sec + SRDF Writes/sec) rolled up from the SRDF devices in the group (V3)
RDF Rewrites/sec	SRDF rewrites per second (V3).
RDF Writes/sec	SRDF writes per second (V3).
RDF/S Write RT (ms)	A summary of the read, write, and average response times for the selected SRDF/S group (V3).
Read Miss RT	The average time that it took the storage to serve one read miss I/O for this group.
Read RT	The calculated average read response time
Read RT 14 to 32	Read RT 14—32
Read RT Count 0 to 1	Read RT Count 0—1
Read RT Count 1 to 3	Read RT Count 1—3
Read RT Count 14 to 32	Read RT Count 14—32
Read RT Count 3 to 5	Read RT Count 3—5
Read RT Count 5 to 8	Read RT Count 5—8
Read RT Count 8 to 14	Read RT Count 8—14
Read RT Count Over 32	Read RT Count Over 32
Read RT Over 32	Read RT Over 32
Response Time	The calculated average response time
Seq IOs/sec	The number of I/O operations performed each second that were sequential (V4).
Seq Read Hits/sec	The number of sequential read operations performed each second by the group that were immediately satisfied from cache (V4)
Seq Read Miss/sec	The number of sequential read operations performed each second by the group that were misses (V4)
Seq Reads/sec	The number of read I/O operations performed each second that were sequential (V4).
Seq Write Hits/sec	The number of sequential write operations performed each second by the group that were immediately satisfied from cache (V4)
Seq Write Misses/sec	The number of sequential write operations performed each second by the group that were misses
Seq Writes/sec	The number of write I/O operations performed each second that were sequential.
Skew	Skew (V3)
Sync MBs Sent/sec	The number of sync MBs sent per second using this storage group (V3)
Sync Write Reqs/sec	The number of sync write requests managed by this storage group per second (V3).
Total Capacity	The total capacity of the storage group (GBs)
Total Tracks	The total number of tracks for the storage group
Warning Alert Count	Number of warning alerts
WP Count	WP count
WP Used Capacity	WP used capacity
Write Miss RT	The average time that it took the storage to serve one write miss I/O for this group.
Write paced delay	Write paced delay (V3).
Write RT	The calculated average write response time
Write RT 14 to 32	Write RT 14—32
Write RT Count 0 to 1	Write RT Count 0—1
Write RT Count 1 to 3	Write RT Count 1—3
Write RT Count 14 to 32	Write RT Count 14—32
Write RT Count 3 to 5	Write RT Count 14—32
Write RT Count 5 to 8	Write RT Count 5—8
Write RT Count 8 to 14	Write RT Count 8—14.
Write RT Count Over 32	Write RT Count Over 32
Write RT Over 32	Write RT Over 32

% Hit

The percent of I/O operations that were immediately satisfied from cache

% Miss

The percent of I/O operations that were misses

% Random IO

The percent of I/O operations that were random.

% Random Read Hit

Calculated value: 100 * (random read hits per sec/total I/O operations per sec).

% Random Read Miss

Calculated value: 100 * (random read misses per sec/total I/O operations per sec).

% Random Reads

The percent of all read I/Os that were random.

% Random Write Hit

Calculated value: 100 * (random write hits per sec/total I/O operations per sec).

% Random Write Miss

Calculated value: 100 * (random write misses per sec/total I/O operations per sec).

% Random Writes

The percent of all write I/O operations per second that were random.

% Read Hit

The percent of read operations, performed by the group, that were immediately satisfied by cache

% Read Miss

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.

% Reads

The percent of I/O operations that were reads

% Seq Read

Calculated value: 100 * (seq reads per sec/total I/Os per sec).

% Seq Read Hit

The percent of the sequential read operations that were immediately satisfied from cache

% Seq Read Miss

The percent of the sequential read operations that were misses

% Seq Write Hit

The percent of the sequential write operations that were immediately satisfied from cache

% Seq Write Miss

The percent of the sequential write operations that were misses

% Seq Writes

Calculated value: 100*(seq writes per sec/total I/Os per sec) (V4).

% Sequential IO

The percent of I/O operations that were sequential

% Write Hit

The percent of write operations, performed by the group, that were immediately satisfied by cache.

% Write Miss

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.

% Writes

The percent of I/O operations that were writes

Allocated Capacity

The total allocated storage group capacity

Async MBs Sent/sec

The number of async MBs sent per second using this storage group (V3)

Async Write Reqs/sec

The number of async write requests managed by this storage group per second (V3).

Avg IO Size

Calculated value: (HA Kbytes transferred per sec /total I/Os per sec)

Avg Read Size

Calculated value: (Kbytes read per sec/total reads per sec)

Avg Write Size

Calculated value: (Kbytes written per sec/total writes per sec)

Avg. Write Paced Delay (ms)

Average write paced delay (V3).

BE % Reads

The percent of the back-end I/O that were read requests

BE % Writes

The percent of the back-end I/O that were write requests

BE Optimize Write Throughput

Internal metric

BE Partial Sector Writes (KB)

The KBs of back-end I/O that were partial sector writes (V3)

BE Prefetched Throughput

The number of tracks per second prefetched from disk to cache upon detection of a sequential read stream

BE Prefetched Tracks Used/sec

The number of prefetched tracks used each second from the disk directors to the cache

BE Prefetched Tracks/sec

Total prefetched tracks each second from the disk directors to the cache.

BE RDF Copy

Internal metric (V3)

BE RDF Copy (MB)

Internal metric (V3)

BE Read Reqs/sec

The number of read requests each second performed by the disk directors to cache.

BE Reads For Copy/sec

Internal metric

BE Reqs/sec

The number of read/write requests each second performed by the disk directors to cache.

BE Throughput Read

BE Throughput Read (V3)

BE Throughput Read For Copy

BE Throughput Transferred

BE Throughput Written

BE Throughput Written (V3)

BE Throughput Written For Copy

BE Throughput Written For Rebuild

BE Write Reqs/sec

The number of write requests each second performed by the disk directors to cache.

BE Writes For Copy/sec

Internal metric

BE Writes For Rebuild/sec

Internal metric

Critical Alert Count

Number of critical alerts

Device Block Size

The block size of the volume

External Read RT

The time it takes to process a read outside of the system (V4)

External Response Time

The time it takes to process an IO request outside of the system (V4)

External Write RT

The time it takes to process a write outside of the system (V4)

Host Hits/sec

The number of host read/write operations performed each second by the group that were immediately satisfied from cache.

Host IO Limit % Time Exceeded

Host I/O Limit percentage time exceeded (V4)

Host IO Limit IOs/sec

The number of I/O operations per second the FE port is processing on behalf of the specific storage group.

Host IO Limit Throughput

The number of MBs the FE port is processing on behalf of the specific storage group.

Host IO Limit Time Exceeded

The number of I/O operations per second the FE port is performing on behalf of the specific storage group.

Host IOs/sec

The number of host operations performed each second by the group

Host Misses/sec

The number of host read/write operations performed each second by the group that could not be satisfied from cache

Host Read Hits/sec

The number of host read operations performed each second by the group that were immediately satisfied from cache.

Host Read Misses/sec

The number of host read operations performed each second by the group that were not satisfied from cache.

Host Reads/sec

The number of host read operations performed each second by the group.

Host Throughput

The cumulative number of host MBs read/writes per second by the group

Host Throughput Read

The cumulative number of host MBs read per second by the group

Host Throughput Written

The cumulative number of host MBs written per second by the group

Host Write Hits/sec

The number of host write operations performed each second by the group that were immediately satisfied from cache.

Host Write Misses/sec

The number of host write operations performed each second by the group that were not satisfied from cache.

Host Writes/sec

The number of host write operations performed each second by the group.

Information Alert Count

Number of information alerts

Internal Read RT

The time it takes to process a read inside of the system (V4)

Internal Response Time

The time it takes to process an IO request inside of the system (V4)

Internal Write RT

The time it takes to process a write inside of the system (V4)

IO Density

The number of BE requests per GB of disk

Max WP Capacity Threshold

The capacity of the maximum number of write-pending slots available

Max WP Threshold

The maximum number of write-pending slots available for the group

Random IOs/sec

I/O operations per second from a host that is not identified as part of a sequential stream

Random Read Hits/sec

Random read I/O operations per second that were satisfied from the cache (V3)

Random Read Misses/sec

Random read I/O operations per second that were misses

Random Reads/sec

Read I/O commands from a host that is not identified as part of a sequential stream.

Random Write Hits/sec

Random write I/O operations per second that were immediately placed in cache because space was available.

Random Write Misses/sec

Random write I/O operations per second that were misses.

Random Writes/sec

Write I/O commands from a host that is not identified as part of a sequential stream.

RDF MBs Read/sec

SRDF MBs read per second (V3)

RDF MBs Written/sec

SRDF MBs written per second (V3)

RDF Reads/sec

SRDF reads per second (V3).

RDF Response Time (ms)

The SRDF round-trip time - the metric is calculated as follows : SRDF Accumulated Service Time / (SRDF Reads/sec + SRDF Writes/sec) rolled up from the SRDF devices in the group (V3)

RDF Rewrites/sec

SRDF rewrites per second (V3).

RDF Writes/sec

SRDF writes per second (V3).

RDF/S Write RT (ms)

A summary of the read, write, and average response times for the selected SRDF/S group (V3).

Read Miss RT

The average time that it took the storage to serve one read miss I/O for this group.

Read RT

The calculated average read response time

Read RT 14 to 32

Read RT 14—32

Read RT Count 0 to 1

Read RT Count 0—1

Read RT Count 1 to 3

Read RT Count 1—3

Read RT Count 14 to 32

Read RT Count 14—32

Read RT Count 3 to 5

Read RT Count 3—5

Read RT Count 5 to 8

Read RT Count 5—8

Read RT Count 8 to 14

Read RT Count 8—14

Read RT Count Over 32

Read RT Over 32

Response Time

The calculated average response time

Seq IOs/sec

The number of I/O operations performed each second that were sequential (V4).

Seq Read Hits/sec

The number of sequential read operations performed each second by the group that were immediately satisfied from cache (V4)

Seq Read Miss/sec

The number of sequential read operations performed each second by the group that were misses (V4)

Seq Reads/sec

The number of read I/O operations performed each second that were sequential (V4).

Seq Write Hits/sec

The number of sequential write operations performed each second by the group that were immediately satisfied from cache (V4)

Seq Write Misses/sec

The number of sequential write operations performed each second by the group that were misses

Seq Writes/sec

The number of write I/O operations performed each second that were sequential.

Skew

Skew (V3)

Sync MBs Sent/sec

The number of sync MBs sent per second using this storage group (V3)

Sync Write Reqs/sec

The number of sync write requests managed by this storage group per second (V3).

Total Capacity

The total capacity of the storage group (GBs)

Total Tracks

The total number of tracks for the storage group

Warning Alert Count

Number of warning alerts

WP Count

WP count

WP Used Capacity

WP used capacity

Write Miss RT

The average time that it took the storage to serve one write miss I/O for this group.

Write paced delay

Write paced delay (V3).

Write RT

The calculated average write response time

Write RT 14 to 32

Write RT 14—32

Write RT Count 0 to 1

Write RT Count 0—1

Write RT Count 1 to 3

Write RT Count 1—3

Write RT Count 14 to 32

Write RT Count 14—32

Write RT Count 3 to 5

Write RT Count 14—32

Write RT Count 5 to 8

Write RT Count 5—8

Write RT Count 8 to 14

Write RT Count 8—14.

Write RT Count Over 32

Write RT Over 32