binodprasai
1 Nickel

Number of Proxies

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Good Morning,

Is there a limit on the number of vadp proxies per vcenter for Avamar 6.1 image level backup?

Regards,

Binod

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fdxpilot
2 Iron

Re: Re: Number of Proxies

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Small world.  I believe we were the customer that was the subject of escalation 4916.  It took months and many, many escalations and conversations with our account team, support, and engineering but this is the response we finally received from some pretty senior folks in Avamar engineering:

“The 48 proxy limit is a QA issue – it is the max we have tested with. If the customer installs more, it puts them in questionable support territory.”

Before reducing the number of proxies, we were seeing a lot of backup jobs cancelled each night.  The 48 proxy "limit" is supposed to be enforced in later versions of Avamar.  We were also directed to not start backups for more than 15 proxies simultaneously.  So we ended up scheduling the Avamar group for each of our vSphere clusters to start at 15 minute intervals.  The reason we needed so many proxies wasn't as much for backup window considerations as it was a side effect of the number of vSphere clusters we have.  We wanted all backups to use hot add transport and the hosts in each cluster share common storage (and no storage is shared between hosts in different clusters).  This necessitated sufficient proxies in each cluster to backup the VMs in that cluster -- with a minimum of two proxies per cluster for redundancy.  Backups have been running well with 48 proxies and some utility node memory tuning.

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RudreshReddy
1 Nickel

Re: Number of Proxies

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The number of proxies are configured based on the number of existing VM's in the vCenter, it is usually 20 VM's per proxy. Not sure how they calculate per vCenter basis.

Thanks

Rudresh

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aj2546
1 Nickel

Re: Number of Proxies

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20 VMs per proxy, does that mean I can run 20 backups at once? Or am I still limited to 1 VM backup per proxy at a time?

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binodprasai
1 Nickel

Re: Number of Proxies

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Thanks Rudresh,

I am looking for the number of proxy we can have per vCenter for Avamar 6.1.

Thanks

Binod

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J_H_
3 Silver

Re: Number of Proxies

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I am running 6.1 and I have 20 proxies

I heard you might be able to do more in 6.1 but no where in the manual does it say so  - which I assume you already know. 

So we need to know from an EMC tech - how many proxies can you have....

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J_H_
3 Silver

Re: Number of Proxies

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RudreshReddy - so you are saying for every 20 vm's we should make a proxy - so if I have 1000 vm's its ok to make 50 proxies?   I know there was a limit to the number you should have.  I have just never been able to find any guide on that.

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Re: Number of Proxies

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If there's no limit documented I would assume you can can install as many as your environment can needs.

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RICHF
1 Copper

Re: Number of Proxies

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Here's the best answer to the maximum number of proxies question I have been able to find.  This info came Avamar Escalation 4916 (6.1.0-333 server) and has been paraphrased for easy reading.

In summary:

  1. The best practice is to limit the number of proxies to 48 (Comment #31).  This best practice is undocumented at this time (Comment # 31 - 2012-08-24) .
  2. 700 VM's is not out of the ordinary and could be handled with less than 20 proxies in a 6 hour backup window (Comment #33).
  3. If the customer needs more than 48 proxies then adjust the groups and have them run at different times so that there is no more than 48 proxies in use at the same time (Comment #34).

In this case the customer reduced the number of proxies to 48 and resolved their performance issue. 

It appears the 20 VMs to 1 proxy rule-of-thumb may be outdated or #3 needs to be enforced if they need more than 48 due to the number of datastores in use.


fdxpilot
2 Iron

Re: Re: Number of Proxies

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Small world.  I believe we were the customer that was the subject of escalation 4916.  It took months and many, many escalations and conversations with our account team, support, and engineering but this is the response we finally received from some pretty senior folks in Avamar engineering:

“The 48 proxy limit is a QA issue – it is the max we have tested with. If the customer installs more, it puts them in questionable support territory.”

Before reducing the number of proxies, we were seeing a lot of backup jobs cancelled each night.  The 48 proxy "limit" is supposed to be enforced in later versions of Avamar.  We were also directed to not start backups for more than 15 proxies simultaneously.  So we ended up scheduling the Avamar group for each of our vSphere clusters to start at 15 minute intervals.  The reason we needed so many proxies wasn't as much for backup window considerations as it was a side effect of the number of vSphere clusters we have.  We wanted all backups to use hot add transport and the hosts in each cluster share common storage (and no storage is shared between hosts in different clusters).  This necessitated sufficient proxies in each cluster to backup the VMs in that cluster -- with a minimum of two proxies per cluster for redundancy.  Backups have been running well with 48 proxies and some utility node memory tuning.

ionthegeek
4 Beryllium

Re: Re: Number of Proxies

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fdxpilot, you have an excellent memory. I just checked the customer name for Esc 4916 and guess who I found...

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