Re: Backup Strategy Query

• Subject: Re: Backup Strategy Query
• From: EB sysadmin <email@hidden>
• Date: Wed, 9 Nov 2005 12:05:18 -0800
• Delivered-to: email@hidden
• Delivered-to: email@hidden

At 1:06 PM -0600 11/9/2005, Brendan O'Toole wrote:
The truth of the matter is that CPU, for most backup applications, doesn't come into play near as much for the average backup user as it does for someone using software encryption and/or

This is not true for Retrospect. RS, by default, makes Snapshots, which it compare during every single backup job to create its diff. This process of comparison is EXTREMELY processor and memory intensive. If you have a volume of 350,000 files that you snapshot every night, RS *will* peg your CPU for 10 minutes when it does its comparison.

RS is not typical backup software. Its normal processes and algorithms, regardless of encryption or compression, require the best CPU and most RAM you can provide them. Generally speaking, a normal RS backup using snapshots is network-bound 50% of the time and CPU/RAM bound 50% of the time, so N.B.

--
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Anthony Siino
Technology Director
Ecole Bilingue
510-549-3895 ext. 324
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