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Slow Performance NetBackup

Hi. We have a problem with performance

Netbackup version 7.7.2 Master server and 2 media servers on Windows Server 2008 R2.

We use Policy type: Vmware; credential with vCenter. Average backup speed by SAN is about ~100MB/s & by LAN is ~60MB/s.

We tried to tune & see next:

info bptm waited for full buffer ~ 20 000 times, delayed ~ 25 000 times

 

Info bpbkar32 bpbkar waited 2 times for empty buffer delayed 2 times

 

 We tested the reading speed with install_path\Netbackup\bin\bpbkar32 -noncont X:\ 1>Nul 2>Nul, & see next results:

tar_base::backup_finish: TAR - backup: image data: 723003392 bytes 26 gigabytes

tar_base::backup_finish: TAR - backup: elapsed time: 294 secs 97415955 bps

 

In PerfMon we watched avg. Disk Bytes/Read = 209 768 Bytes

We tested the array with application Iometer:

 

1)Transfer request size = 209 768 Bytes

# of Outstanding I/Os = 1

& we got :

Total I/Os per Second ~ 657 I/O

Total Mbs per Second ~ 130 MB

Average I/O Response Time ~ 1.5 ms.

 

2)Transfer request size = 209 768 Bytes

# of Outstanding I/Os = 32

& we got :

Total I/Os per Second ~ 10 478 I/O

Total Mbs per Second ~ 2 097 MB

Average I/O Response Time ~ 3 ms.

 

3)Transfer request size = 1MB

# of Outstanding I/Os = 1

& we got :

Total I/Os per Second ~ 316 I/O

Total Mbs per Second ~ 316 MB

Average I/O Response Time ~ 3 ms.

 

4)Transfer request size = 1 MB

# of Outstanding I/Os = 32

& we got :

Total I/Os per Second ~ 2 168 I/O

Total Mbs per Second ~ 2 168 MB

Average I/O Response Time ~ 15 ms.

 

 Thus figured, what send read request successively (in sequence). In this case throughput it depends on the response time.

1.png

2.png

 

 Tried change read block size (Backup Planning and Performance Tuning Guide) – Raw partition read buffer size = 1024. But it did not help, perfmon shows avg.Disk Bytes/Read = 209 768Bytes.

 

Array EMC VMAX. Power Path installed. Required flags on the array are used. SAN – FcoE.

Use NetBAckup on the ReaHat 6.5. Throughput ~ 55MB/s. Avg read question size ~ 109KB.

 

 

Any ideas how to increase the speed?

4 Replies
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Re: Slow Performance NetBackup

Quick question are you using VIP ... if not you can consider it...

 

refer this link

 

https://www-secure.symantec.com/connect/sites/default/files/IA%20B29%20-%20Best%20Prac%20Backup%20%20Recov%20VMware_EM_0.pdf

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Re: Slow Performance NetBackup

We are not using VIP...

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Re: Slow Performance NetBackup

 

Two causes of slow NetBackup for VMware restore performance

https://www.veritas.com/support/en_US/article.TECH169860

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Now I want to increase the

Now I want to increase the backup speed.
 
Restore is the next step