This approach doesn't work if the index is already a single segment
since Solr Old.x.
What would probably be better if there is a way to rewrite segments,
without actually trying to merge them.
On 10/6/21 9:36 AM, Oakley, Craig (NIH/NLM/NCBI) [C] wrote:
FWIW, one way that we have used to determine whether a collection is ready for
upgrade is to run a command like
java -Xms512m -Xmx4g -cp lucene-core-8.5.2.jar -ea:org.apache.lucene...
org.apache.lucene.index.CheckIndex
/your/path/here/snapshot.211006-054002/snapshot.shard1
This will balk if the data was created under Solr6, but is happy enough with
Solr7 (although this does not check for such things as deprecated data types)
I would still be interested in the answer to your original question, so that I
can confirm that all our data will be ready for Solr9 upgrade (preferably
without having to wait for lucene-core-9.0.0.jar to come into existence). We do
a complete reindex when we upgrade (but I want to check that no one skipped
that step)
-----Original Message-----
From: Dave <hastings.recurs...@gmail.com>
Sent: Wednesday, October 06, 2021 9:11 AM
To: users@solr.apache.org
Cc: Jason Carter <ja...@newsrx.com>
Subject: Re: Is there an easy way to determine Lucene versions for segments?
Hold on that idea then. An optimize will use three times your index size
possibly.
On Oct 6, 2021, at 9:02 AM, Michael Conrad <mich...@newsrx.com> wrote:
Thanks,
I think we'll try the full optimize route as we don't have storage to spare for
second copies, etc.
-Mike
On 10/6/21 8:54 AM, Dave wrote:
Personally I always do a full reindex when going to a new version, just safer
and you should always be able to do such at any point. However if you got the
time to spare you can do an optimize and it will force the segments all into
the current version
On Oct 6, 2021, at 8:46 AM, Michael Conrad <mich...@newsrx.com> wrote:
Hello all,
Is there an easy way to determine Lucene versions for segments?
If we were to do a full reindex, rewriting all segments, would that update the
segment version to match the current Lucene version in use?
We are working on upgrading from Solr 7.7.3 to Solr 8.x but have discovered
that several of our collections have segments that are Lucene 6.
-Mike
