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March 13th, 2014 05:00
Distributed Consistency Group (Minimum Journal Size)
Is there a minimum journal size I should be aware of before looking to build a distributed consistency group?
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duhaas1
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March 13th, 2014 05:00
Found my answer:
The recommended journal size for distributed groups with
snapshot consolidation enabled is at least 40GB.
duhaas1
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March 13th, 2014 06:00
Thanks forshr for the feedback. This particular journal is the local journal in a CLR configuration, we don't do any fail back so I believe 40GB should be fine, still recommend multiple 10GB's?
The group would be split among two appliances in a single cluster.
forshr
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March 13th, 2014 06:00
Just a couple of comments to add.
Firstly, I would double this for a 4 x RPA DCG when using snapshot consolidation.
Secondly, depending on the number of RPAs assigned to the DCG, break the 40GB down to 4 x 10GB volumes (assuming 4 x RPAs).
Regards,
Richard
forshr
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March 13th, 2014 06:00
Yes as this would provide better utilisation all of the RPA FC ports plus the 10GB minimum constituent volume requirement relates to a known issue.