RecoverPoint Journal Luns best practice

Hi Ed,

You'll find some best practice recommendations relating to the provisioning of volumes for the journal in the RP Admin Guide.
However, before you reach this stage it is important to ensure that have sufficient journal disk space to satisfy your protection window requirements but also that the performance of the underlying disks as part of the RG or Pool meet the peak overhead of the normal five-phase distribution process. You'll also find information relating to this process and journal sizing formula in the RP Admin Guide. We also have the sizing tools to help in this regard.

In respect of your question relating to RGs vs. Pools, there is no doubt that using a Pool reduces the overhead journal management and provisioning. It's easy to work out what your total performance capability is and the stripe across the Pool works well with the large sequential writes that the RPA performs to the replica copy journal. This to a degree counteracts some of the performance degradation you may see when using a Pool compared to a RG.

That said, a Pool is a generic approach and using a RG for a specific CG may be the best approach as far as overall performance (distribution, image access etc) is concerned especially when the RG has a RAID 1/0 configuration.

Regards,

Rich Forshaw

RecoverPoint Corporate Systems Engineering