Dell PowerVault MD3000 - Manual (Page 21)

Dell™ PowerVault MD3000 and MD3000i Array Tuning Best Practices
December 2008 – Revision A01 Page 21
4.8 Using the CLI Performance Monitor
The CLI Performance Monitor is a command line scripting utility that provides
access to all functions of PowerVault Storage Manager and some additional
performance statistics. In Microsoft Windows, the scripting utility is named
smcli.exe
and is located by default in the c:\program files\Dell\MD
Storage Manage\client
directory. The complete reference guide Command
Line Interface Guide
for the MD3000/3000i is located on Dell’s support website at
http://support.dell.com/manuals.
The following are examples of CLI commands.
The command to run the CLI Performance Monitor is:
SMcli -n ArrayName -c "set session performanceMonitorInterval=5
performanceMonitorIterations=30;save storageArray performanceStats
file=\“performance.csv\";“
Volume 1 Attributes:
Volume Type: RAIDVolume
User Label: MyRAID5vd
...
BlockSize: 512 bytes
LargeIoSize: 4096 blocks
...
Perf. Stats: Requests Blocks Avg. Blks IO Percent
Reads 577761063 1155647889 2 87.50%
Writes 82542765 175687877 2 12.50%
Large Reads 0 0 0 0.00%
Large Writes 0 0 0 0.00%
Total 660303828 1331335766 2 100.00%
...
*** Performance stats ***
Cluster Reads Cluster Writes Stripe Reads
6252626 3015009 5334257
Stripe Writes Cache Hits Cache Hit Blks
2040493 4685032 737770040
RPA Requests RPA Width RPA Depth
982036 3932113 418860162
Full Writes Partial Writes RMW Writes
653386 29 328612
No Parity Writes Fast Writes Full Stripe WT
0 0 0
Figure 10: Second Generation Firmware - Write Algorithms