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joeywashburn
3 Posts
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May 9th, 2013 06:00
Disk Latency Issues Vmware Backups with Proxy
We have a new installation of Avamar and Data Domain. We are using the most current version of the proxy I am aware of AvamarCombinedProxy-linux-sles11_64-6.1.101-87.ova.
Using vSphere 5.1, we have 22 datastores with 10-15 VMs per Datastore all backed by large 15k Enterprise Storage solution. We currently have 6 proxies and we are using CBT.
Whenever we start a backup, our monitoring system starts alerting us about disk latency and we actually have some systems go offline. I have a few questions to try and solve this issue
Should each be on its own datastore?
Is there any best practice or guide for #of proxies per vm, or anything that has some sort of design suggestions.
joeywashburn
3 Posts
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Posted May 13th, 2013 09:00
Thanks for the Reply. I have not measured yet. Ill check out that link to see if its helpful. We are using an HP XP24000 SAN
StephaneG1
2 Posts
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Posted May 13th, 2013 05:00
Hello,
Have you try to mesure the disk latency from your vSphere Client? The VMware best practice are asking for a datastore latency under 30ms (Troubleshooting Storage Performance in vSphere – Part 1 – The Basics | VMware vSphere Blog - VMware Blogs).
As far as I know, you should use one proxy for about 15 VMs. In my case I deploy 12 proxies per GRID and it's ok, I never met latency problem.
What kind of SAN do you use?