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From Erick Erickson <>
Subject Re: Upgrading from Solr cloud 4.1 to 6.2
Date Tue, 04 Oct 2016 03:05:26 GMT
the very easiest way is to re-index. 10M documents shouldn't take
very long unless they're no longer available...

When you say you tried to use the index upgrader, which one? You'd
have to use the one distributed with 5.x to upgrade from 4.x->5.x, then
use the one distributed with 6x to go from 5.x->6.x.


On Mon, Oct 3, 2016 at 8:01 PM, Neeraj Bhatt <> wrote:
> Hello All
> We are trying to upgrade our production solr with 10 million documents from
> solr cloud (5 shards, 5 nodes, one collection, 3 replica) 4.1 to 6.2
> How to upgrade the lucene index created by solr. Should I go into indexes
> created by each shard and upgrade and  replicate it manually ? Also I tried
> using Index upgrader in one replica of one shard as a test but it gives
> error as it is looking for file and it is not there
> Any idea what is the easy way to upgrade solr cloud with a 10m repsoitory
> Thanks
> neeraj

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