Re: ScaleIO mirror or Scaleio DR

Hello Hoanhdo,

Multiple simultaneous failures within a Protection Domain can lead to data unavailability (by simultaneous, I am referring to a second component failure (eg SDS), before an earlier component failure has been resolved (eg. before an automatically triggered mirror rebuild has completed; such scenarios should be rare because rebuilds are expected to complete quickly due to the ScaleIO wide-stripe layout)). However, to mitigate against this, you could use a host-based volume manager to mirror 2 (otherwise independent) ScaleIO volumes presented/mapped from 2 separate Protection Domains.

This type of host-based mirroring is generally the basis for implementing a failover cluster technology on top; several cluster technologies are listed in the ScaleIO support matrix.

Just an option to consider researching further.

Thanks, Richard.

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