Consider the following guidelines to determine storage requirements:
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Use the following assumptions to decide on the appropriate storage requirements.
Recovery Window goal = 1 day
Average Aggregate Write I/O per day = 1 GB
Network outage protection = 12 hours
Amount of data and metadata that will fit in an LFC:
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amount of data = .95 of LFC size
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amount of metadata = .05 of LFC size
Therefore, a 16MB LFC will hold 15.2 MB of data.
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Using these assumptions, determine the LFC space.
Production LFC space __1GB x .5 = 500MB_________
Recovery LFC space __2 x (1GB) x 1 = 2 GB_________
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Using this space, calculate the LFC size and the number of production and recovery LFCs.
LFC size _16 MB___________________________
Production LFCs __500 /(16 * .95)= 33________________
Recovery LFCs ___2000/(16 * .95) = 132_______________
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If there is space available to create a separate volume group, create a volume group that is large enough to hold the LFCs.