Back-End Performance - HPE XP7 User Manual

Item on left side of Object
field
LUN*
Entire Storage System
Journal
* Volumes that do not accept I/O from the host, such as pool-VOLs, are not monitored.

Back-end performance

Function
The back-end transfer can be monitored. The back-end transfer is the number of data transfers
between the cache memory and the data drive. The graph contains following information.
Cache to Drive
The number of data transfers from the cache memory to data drives.
Drive to Cache Sequential
The number of data transfers from data drives to the cache memory in sequential access
mode
Drive to Cache Random
The number of data transfers from data drives to the cache memory in random access mode
Storing period
Short-Range can be specified.
Selection of monitoring objects
Select the desired monitoring objects in the Performance Objects field.
Item on left side of Object
field
Logical Device*
Item on right side of
Object field
Base
Cnt Ac-J
Cnt Ac-J/Cnt Ac-J MF
Cnt Ac-J/Cnt Ac-J MF
Item on right side of
Object field
Base
Item on left side of
Monitor Data field
Cache Hit (%)
Initial Copy
Initial Copy
Initial Copy
Item on left side of
Monitor Data field
Back Trans. (count/sec)
Item on right side of
Monitor Data field
Write (Random)
Write (CFW)
Read (Total)
Read (Sequential)
Read (Random)
Read (CFW)
Write (Total)
Write (Sequential)
Write (Random)
Write (CFW)
Cache Hit (%)
Cache Hit (%)
Cache Hit (%)
Item on right side of
Monitor Data field
Total
Cache to Drive
Drive to Cache (Sequential)
Back-end performance 43