differential backup take longer time

Question

Hi,

i have schedule Farm differential back. differential backup taking longer time to complete around 4 hours , during this time farm response is very slow sometime no response on site.

Could you please tell what could be an issue and how to speed up farm differential backup.

thanks.

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iffi

Answer 1

Hi,

There are many factors which can affect the performance of the backup, such as, the size of the content of backup, network bandwidth and I/O request latency. I just list some of them not all.

A Differential backup will back up all selected files that are new and changed since the last full backup. So it will take more time than incremental backup.

For more information about the differences between them, check out the following articles:

http://www.symantec.com/business/support/index?page=content&id=TECH7665

http://en.wikipedia.org/wiki/Incremental_backup

http://support.microsoft.com/kb/136621

For more information about Backup and recovery best practices (SharePoint Server 2010), see

http://technet.microsoft.com/en-us/library/gg266384.aspx

Thanks,

Rock Wang

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Rock Wang TechNet Community Support

Answer 2

Hi,

How do i take incremental back using powershell.

thanks

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iffi

Answer 3

http://technet.microsoft.com/en-us/library/ee428316.aspx

Refer above article to perform a backup.

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上善若水

Lambert Qin [秦磊] | 博客(Blog): SharePoint in My Eyes 中文 / LinkedIn

Posting is provided "AS IS" with no warranties, and confers no rights.

Answer 4

Hi Lambert,

i m using following command 

Backup-SPFarm -Directory <BackupFolder> -BackupMethod {Full | Differential} [-Verbose]

and schedule it through windows task and its taking 4 hrs to complete differential backup.

thx

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iffi

Answer 5

when did you perform the last full backup? Or you could simply check the differential backup size.

Differential backup is based on you last full backup, if your last full backup is long time ago, it is common differential backup takes long time.

In my project, it takes me about 3 hours to full backup 500GB content. and since I cannot afford too much time to perform full backup with growing content. I switch to SQL Server backup. Maybe you can have a try.

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上善若水

Lambert Qin [秦磊] | 博客(Blog): SharePoint in My Eyes 中文 / LinkedIn

Posting is provided "AS IS" with no warranties, and confers no rights.