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From Erick Erickson <>
Subject Re: Recipe for moving to solr cloud without reindexing
Date Tue, 07 Aug 2018 14:38:38 GMT

One thing, what version of Solr are you moving _from_ and _to_?
Solr/Lucene only guarantee one major backward revision so you can copy
an index created with Solr 6 to another Solr 6 or Solr 7, but you
couldn't copy an index created with Solr 5 to Solr 7...

Also note that shard splitting is a very expensive operation, so be patient....


On Tue, Aug 7, 2018 at 6:17 AM, Rahul Singh
<> wrote:
> Bjarke,
> I am imagining that at some point you may need to shard that data if it grows. Or do
you imagine this data to remain stagnant?
> Generally you want to add solrcloud to do two things : 1. Increase availability with
replicas 2. Increase available data via shards 3. Increase fault tolerance with leader and
replicas being spread around the cluster.
> You would be bypassing general High availability / distributed computing processes by
trying to not reindex.
> Rahul
> On Aug 7, 2018, 7:06 AM -0400, Bjarke Buur Mortensen <>, wrote:
>> Hi List,
>> is there a cookbook recipe for moving an existing solr core to a solr cloud
>> collection.
>> We currently have a single machine with a large core (~150gb), and we would
>> like to move to solr cloud.
>> I haven't been able to find anything that reuses an existing index, so any
>> pointers much appreciated.
>> Thanks,
>> Bjarke

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