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You've actually identified the issues involved. Here's a writeup on how you can do it, and the general best-practice for capacity management in Swift:

https://swiftstack.com/blog/2012/04/09/swift-capacity-management/


--John




On Aug 22, 2014, at 11:50 AM, Lillie Ross-CDSR11 <Ross.Lillie at motorolasolutions.com> wrote:

> All,
> 
> I want to reconfigure a number of disks in my Swift storage cluster to reside in different zones, and I’m unsure of the best way to accomplish this.
> 
> One way would be to set the drive weights to 0 and wait for data to migrate off the drives, then remove the drive from their current zone and re-add the drive to the new zone, rebalance and push the new ring files out to the cluster.
> 
> Or I could simply remove the drives, re-add the drives to their new zones, rebalance and push out the updated ring files.
> 
> Is one approach better than the other, or is there a better way than I’ve outlined above? Since any approach would be performed over a weekend, I’m not concerned about the effects of cluster performance as partitions are shuffled around.
> 
> Thoughts and inputs are welcome.
> 
> Thanks,
> Ross
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