My Geek Finds » p_cache http://www.mygeekfinds.com Tech notes, Virtualization, Networking Tue, 23 Feb 2010 13:43:26 +0000 http://wordpress.org/?v=2.9.1 en hourly 1 AVAMAR f_cache and p_cache Formulas http://www.mygeekfinds.com/2009/06/avamar-f_cache-and-p_cache-formulas/ http://www.mygeekfinds.com/2009/06/avamar-f_cache-and-p_cache-formulas/#comments Tue, 09 Jun 2009 14:08:22 +0000 Hersey http://www.mygeekfinds.com/?p=238 Formulas to help determine the correct size of your f_cache and p_cache for AVAMAR backups.

f_cache = N * 40MB

N = Millions of Files
So for 3 million files:
f_cache = 3 * 40MB
f_cache = 120MB

p_cache = DB Size in GB/Average Chunk * 20MB

Average Chunk Sizes:
Exchange DB: 16
Microsoft SQL DB: 24

For a 100GB Microsoft SQL DB:
p_cache = 20/24 * 20MB
p_cache = 83.3MB

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