Slow performace from BKExec 2012 to DeDuplicated Disk

Hello,

We've just moved to BKExec 2012 from 2010. Fully removing then installing the software from scratch.

We have two BKExec servers at different sites, both the same hardware spec, Windows 2008 X64 R2, SP1 with 32 GB memory.

Our deduplication area is hosted on or Equalogic SAN connected by the LAN direct to the Backup Exec Server.

The problem we are having is that backup are slow, especially exchange. Backing up a 171gb information store took almost 8 hours and failed reporting '-1022 There is a disk IO error'

The backups speeds initially build up to around 900MB/s, but soon fall down to 390MB/s.

Backing up a file server (1.5TB) took 32 hours at a rate of 778MB/s

Performance wise, network on both server (backup and target) is never higher than 25% for both the network and san links. Memory usage is about 40% with cpu hardly being used.

With the file server, we have F-Secure, but we ran a pre and post job command to stop this from scanning while the backup was running.

Windows and BackUp Exec are both fully up to date.

Any help on this would be greatly received.

Thanks

Lee

2012

Agent for Microsoft Exchange Server

Backing Up

Backup and Recovery

Backup Exec

Backup Exec (media server only)

Deduplication Option

Dell

MS Exchange

Remote Agent for Windows Servers

17 Replies

Jaydeep_S
Level 6
12 years ago
Performance issues can be tricky as it might be a combination of lots of potential causes. Please look through the article below as they are fairly elaborative about what could be done.
http://www.symantec.com/docs/TECH49521
http://www.symantec.com/docs/DOC5481

However, I would suggest you to to try to disable Check Point Restart. Backup Exec 2012 enables the Checkpoint Restart feature by default. This can make the backup speed slower than previous versions
http://www.symantec.com/docs/TECH191072
Javed_Nawaz
Level 3
12 years ago
Hi leeweedon,

Any update from the last Engineers posting on your issue ?
CraigV
Moderator
12 years ago
Hi,

1. Yesterday was the 25th...give the OP a chance to test!

2. Please stop sending update requests in the forums...rather send a PM! Nothing new to add by doing so.

Thanks!
leeweedon
Level 5
12 years ago
Thanks for the reply Jaydeep.

We have identified the problem to be the backups of the Information Stores. A flat file backup of the exchange server works at around 1000MB/SEC which is not ideal, but acceptable.

When backing up the IS using the agent it still runs less that 300MB/sec We have tried disabling Verify, Test Run, Enable Checkpoint Restart but this doesn't change anything.

I've even tried without the consistancy checks being enabled, but still no improvement.

Our exchange server 2007 is running Windows Defender and ForeFront.
CraigV
Moderator
12 years ago
...is your AV perhaps scanning the dedupe folder?
leeweedon
Level 5
12 years ago
Do you mean the AV on the BKEXEC server? If so, no. I removed the AV completely from it.
CraigV
Moderator
12 years ago
That's what I meant Lee. Is the AV on the Exchange server perhaps scanning the beremote.exe service? What happens to your backup of the Information Store if you disable the AV on the Exchange server?

Also, what is the configuration of your storage on which the dedupe folder is located?
leeweedon
Level 5
12 years ago
I have just tested using a pre-job command to stop Windows Defender. This seems to make no difference, but I will test this fully this evening.
Jaydeep_S
Level 6
12 years ago
leeweedon could you please try and run the Information store job to a test B2D folder or a Tape Device,instead of Deduplication folder/device. This will atleast isolate, if it is the transfer from source or th write to target is in fault.

Also would be nice if you can try the steps in http://www.symantec.com/docs/TECH186741
leeweedon
Level 5
12 years ago
Carrying on from this it doesn't appear to be AV related.

Backing up to Local Dis Storage (non-DeDupe) is also very slow.