PureDisk performance issue
- 13 years ago
I have reviewed lots of staff regarding this and your comments helped alot on this. as the question was about the PD performance issue and if the command syntax is correct, I cannot mark anybodies post as solution as they have been just guidence not an answer. i cannot mark current post as solution as well, but it has some more info which could help others.
I am going to share this to guide anybody else who will face with same issue or similar issue
I worked with Symantec on this and we have done following to test performance issue of the PD:
- Media server performance (available memory, CPU and etc..);
- Media server NIC througput (Network performance); - just did some monitoring on the media server to check if we have enough throuput on media server NIC.
- PDOS performance; - this has been checked by Symantec engineer. but wrote it down for future purposes. here is how to check it:
In the /Storage/log/spoold/storaged.log find two entries.
1. November 05 11:54:08 INFO [1077967168]: Synchronization for transaction log /Storage/queue/sorted-494123-495860.tlog started, 936016 transactions pending..
2. November 05 13:09:03 INFO [1077967168]: Time required to build index on objects2 table: xxxxxx.xxxxx
3. Subtract the time example 13:09:02 - 11:54:08 = 75 (minutes in my example)
4. Divide the number of transactions by the number of minutes
936016 / 75 = 12480.2133 transactions per minute
My transactions per minute is:
13:26:11 - 10:10:24 = 196minutes
34193021 / 196 = 174454.1887 transactions per minuteAnything above 100,000 transactions per minute is good.
4. PD disk performance; will be checked in two ways. by running dd command or by camel tool. you can find more details here:
http://www.symantec.com/business/support/index?page=content&id=TECH156743
Issue with our PD was on disk performance and NIC. NIC on media server was highly utilised and PD disk performance is ~60MB, recommanded is to be more than 150MB.
And whoever have NBU ver 7.1.0.3 and more has to do some tuning as well as mentioned in Mariannes post: NetBackup 7.1.0.3 rehydration improvements
Thanks everyone for your answers!