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October 9th, 2014 09:00
Question for bandwidth required for Avamar backups
Hi,
We are planning to migrate to Avamar backup solution for servers located in remote locations.
We have a 1 TB file+application server in the remote site. Daily change of data is around 10%.
How much bandwidth would Avamar require for this. We need o plan accordingly.
Regards
tech88kur
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Avamar Exorcist
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October 10th, 2014 02:00
The bandwidth required will depend on two other main factors
1) The maximum possible length of the backup window
2) How much data typically gets transferred from client to server on a daily basis
To determine #2, gather the log from a recent complete backup and find the line towards the end which shows the backup summary. For example:
2014-08-20 19:01:44 avtar Info <5156>: Backup #167 timestamp 2014-08-20 18:27:15, 16 files, 19 folders, 3,312 GB (16 files, 3.549 GB, 0.11% new)
The second number in the bracketed section tells us how much new, unique data was sent to Avamar during the backup. In this case, 3.549GB. Divide that by the number of hours in your backup window and if necessary, use a bandwidth converter site to arrive at a Mbit/sec value for your minimum required network bandwidth.
You can probably count on the process consuming up to 80% of the available bandwidth. Bear in mind that any packet loss or sharing with other applications will have a negative effect on throughput.
Also consider the possibility of spikes or natural increase in the amount of new data in the backup and make sure there is enough bandwidth available to absorb the impact of that whilst still allowing the backup to complete within the window.