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From Shawn Heisey <apa...@elyograg.org>
Subject Re: Move index directory to another partition
Date Wed, 02 Aug 2017 01:31:54 GMT
On 8/1/2017 7:09 PM, Erick Erickson wrote:
> WARNING: what I currently understand about the limitations of AWS
> could fill volumes so I might be completely out to lunch.
>
> If you ADDREPLICA with the new replica's  data residing on the new EBS
> volume, then wait for it to sync (which it'll do all by itself) then
> DELETEREPLICA on the original you'll be all set.
>
> In recent Solr's, theres also the MOVENODE collections API call.

I did consider mentioning that as a possible way forward, but I hate to
rely on special configurations with core.properties, particularly if the
newly built replica core instanceDirs aren't in the solr home (or
coreRootDirectory) at all.  I didn't want to try and explain the precise
steps required to get that plan to work.  I would expect to need some
arcane Collections API work or manual ZK modification to reach a correct
state -- steps that would be prone to error.

The idea I mentioned seemed to me to be the way forward that would
require the least specialized knowledge.  Here's a simplified stating of
the steps:

* Mount the new volume somewhere.
* Use multiple rsync passes to get the data copied.
* Stop Solr.
* Do a final rsync pass.
* Unmount the original volume.
* Remount the new volume in the original location.
* Start Solr.

Thanks,
Shawn


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