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From Alexander Ramos Jardim <>
Subject Splitting a backup index
Date Mon, 25 Aug 2014 13:56:09 GMT

I am making some performance tests with a backup index from one week ago.
For these tests I use a newly provisioned infrastructure identical to my
production environment.

As my production collections have 2 shards each, I begin the test putting
each backup shard in a different host so that I have scenario like:

host1 : backup_shard1
host2 : backup_shard2

Each shard contains 200k documents and is 4GB large.

Then, I issue a SPLITSHARD action at backup_shard1 with the command

The shard is split in two as expected, but none of the documents from the
original shard go to the new ones even running a commit after the

On another test, if I start both hosts with empty shards and begin to index
documents, I get the right behaviour for SPLITSHARD, i.e., I can see the
documents after the shards been split.

So, what am I doing wrong at my backup recovery? How can I take shards from
backup and split them on a different cluster than the original?

PS: solr version is 4.9.0

Alexander Ramos Jardim

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