Welcome to this EMC Support Community Ask the Expert conversation. This discussion covers Avamar with VMware backup.
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Being familiar with best practices both specific and general for these environments has enabled him to quickly identify inefficiencies and possible improvements that can be made in technology and process. Experienced in supporting both disk and tape technologies including StorageTek, NetApp, EMC and Data Domain. He writes at backupbuddha.ca about backup recovery for both the enterprise as well as the home consumer.
He hopes someday to retire to his secret underground base surrounded by an army of robot ninjas. You can follow him on twitter @backupbuddha.
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The discussion was live from the 11th June until the 29th June, 2012 and hosted by Vijay and Dan . Thanks to them both for facilitating a great discussion.
Re: Vblock 1K Vm backup to AVE+DD
1. Instead of multiple NICs per AVE, how about doing multiple AVEs - 1 per required subnet ?
This is a supported configuration, and the DD box is capable of backing up multiple Avamar servers.
Also - I'm not clear on why multiple NICs are needed in the first place - are these ISOLATED vlans ?
Avamar Image backup does not require network connectivity to the VM. In fact, it is quite comfortable
backin-up VMs with NO network. So, this requirement is not clear.
Sorry - I seem to be generating more questions than giving answers.
2. The number of VM's an AVE can support varies greatly, based on types of VM, hardware speeds, VM sizes and change rates. Since the AVE is equivalent to a small single-node Avamar, I would not be comfortable with more than say 6 simultanious VM backups . If you can get an average GB/hour for a VM backup rate for your hardware, based on the length of your backup window, you can estimate how many GB you can support per AVE, and work from that to figure a number of VM's.
3. The answer is Yes. Avamar/DD pairs can replicate.
As a part of the replication configuration, you specify which DD device on the target holds data for a particular Avamar client domain.
Re: Vblock 1K Vm backup to AVE+DD
Thanks for your answers.
You are right, the customer has 2 isolated VLANs, so his idea is to have a seperate NIC for each. But i like the idea to have a AVE per VLAN, lets see if the customer likes it too 😉
I don´t understand what you mean with "backing up VMs with NO network"?
We have problem with restore time of vm's. We have Avamar 6.0.66 and VMware 5.0 Essential,
so we do not have SCSI HOTADD.
SCSI HOTADD is only in enterprise vmware license.
SSLNBD transport is used. It is very slow due to SSL lib problem.
Is it possible (and how) to use not encrypted transport in avamar - I think NBD is faster than SSL NBD.
You can use the flag:
to specify that you want it to try "nbd" first, then "nbdssl".
This can be specified in either one of 2 ways:
Yes - NBD should speed up the backup somewhat, although not as spectacular as hotadd.
What's up with Avamar not supporting file level restores from VM GPT or dynamic disks? Neither are new and GPT in particular is becoming more of a standard as large VMs become more common. Also, why does the Avamar backup job complete with no warning that file-level restore will not be possible? Honestly, I'd expect more from a product from a company with a significant stake in VMware.
Also, why is mapping data stores to proxies such a pain? Consider an environment where you have multiple large ESX clusters, each with their own set of datastores. That is an awful lot of configuration and maintenance to keep datastore mapping up to date so backups use hotadd transport mode as often as possible.
Are there any plans to offer auto-discovery capabilities for VMs? Perhaps something similar to the different type of affinities other products offer?
The File-level-restore (FLR) partition restrictions all come from vmWare's implementation limitations.
Avamar code basically uses the equivalent of vmware-mount, to mount the backed-up vmdk.
Since the restore restrictions are imposed by vmWare implementation (which may change), the Avamar software does not make a determination of FLR restore at backup time.
Re: Mapping data stores - I agree it could probably be rule-driven to make things easier. I will advise product management of your suffering.
Auto discovery of vm's is in an imminent release.
I´m trying to perform a File Level Restore from a Image Backup. The problem is that fails after a few minutes with the following message:
avvmwfile Error <0000>: File level restore failed.
I´ve noticed that at the time that the backup fails, the proxy has already dismounted the VMDK.
I suppose there is a time out. If that is the case ... Where is it configured? Can I change this value?.
Thanks and regards.