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Tentacle2011101
Contributor
Contributor

Few of the VMs take very long time to backup

Hi,

Where I should look for problems when few of our VMs take very long time to backup.

We're using VDP appliance 6.1.1 and from the VDP SSH shell I can see current progress which looks like this:

root@vdp:~/#: /usr/local/avamar/bin/mccli activity show --active=true

0,23000,CLI command completed successfully.

ID               Status  Error Code Start Time           Elapsed     End Time             Type             Progress Bytes New Bytes

---------------- ------- ---------- -------------------- ----------- -------------------- ---------------- -------------- ---------

9145825200059909 Running 0          2016-03-18 09:13 EET 06h:33m:54s 2016-03-19 00:00 EET Scheduled Backup 49.1 GB        0.5%    

9145825200126109 Running 0          2016-03-18 07:30 EET 08h:16m:06s 2016-03-19 00:00 EET Scheduled Backup 35.8 GB        1.5%

9145825200058209 Running 0          2016-03-18 05:45 EET 10h:01m:08s 2016-03-19 00:00 EET Scheduled Backup 98.6 GB        6.6%

9145825200094609 Running 0          2016-03-18 00:42 EET 15h:04m:34s 2016-03-19 00:00 EET Scheduled Backup 139.7 GB       5.6%

9145825200073809 Running 0          2016-03-18 03:57 EET 11h:49m:00s 2016-03-19 00:00 EET Scheduled Backup 45.2 GB        1.9%

Even there is only 0,5 % of new bytes it takes 6+ hours to complete.

None of those VMs are larger than 200 GB and no other backups are running at the same time.

We have about 5 of these in every 500 VMs. Some are Linux, some are Windows and even different versions.  All of them have vmware-tools installed and virtual hardware is version 10.

I don't mind if backups are taking long but every now and then it takes so long that VM can not be backed up at all in VDPs backup window.

Network is 1 gbit and backup storage HP D2600 disk shelf with 12 x 3 TB NL-SAS disks in RAID6.

Any ideas?

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2 Replies
snekkalapudi
VMware Employee
VMware Employee

The transport mode being used might be NBD. Backup over network depends on the bandwidth.

You can check if yours fall into this category

-Suresh
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Tentacle2011101
Contributor
Contributor

All hosts have local storage and I've tried installing proxies on hosts to speed things up but it did not help.

The VMs that take long time to backup are always the same ones which is weird as they don't differ dramatically from other VMs we have running.

Is there any way to debug this behaviour?

Thank you for your reply!

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