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March 14th, 2011 08:00
How many consistency groups can 1 RPA handle?
I have 2 RPAs at both sites and have 14 Consistency Groups (CG), when do I need to look at adding another RPA at each site? If one RPA fail how many CG can 1 RPA support?
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Joe_Ab
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March 14th, 2011 08:00
you can have up to 128 CGs per cluster, 64 consistency groups can be replicated by a single RPA.
Gary_Archer
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March 16th, 2011 11:00
Yousef is correct in that each RPA can be setup for a total of 64 with an overall total of 128; however if that is not your question then each RPA will give you about 75MB/sec replicated throughput (with low or none compression). If you exceed this amount then you can define a distributed consistency group that will gang the throughput of up to 4 RPAs for a maximum (with 4 RPAs) of 240MB/sec. This is write rate, so take a look at your write activity on your production volumes that are being replicated and use that number. That way you can decide if the RPA will be overloaded or not.
Gary