Monday, January 30, 2017

NetWorker client file index database Size

For the NetWorker client file index database (nsr/index): The number of files
indexed and in the browse policy. This is normally the largest of the NetWorker
databases. For storage sizing, use this formula:


Index catalog size = {[(F+1)*N] + [(I+1) * (DFCR*N)]} * [(1+G)*C]


where:

F = 4 (Full Browse Period set to 4 weeks)

N = 1,000,000 (one million files for this example)

I = 24 (A four week browse period for incremental backups - minus the full backups)

DFCR = 3% (Daily file change rate for standard user file data)

G = 25% (estimated annual growth rate %)

C = 160 bytes (Constant number of bytes per file)

For example:

{[(4+1)*1,000,000] + [(24+1) * (3%*1,000,000)]} * [(1+.25)*160]

{5,000,000 + [25 * 30,000)} * [1.25 * 160]

5,750,000 * 200 bytes

= 1,150,000,000 bytes

= 1150 MB


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