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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5146) Figure out what it would take for lazily-loaded cores to play nice with SolrCloud
Date Wed, 05 Feb 2014 15:22:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13892221#comment-13892221
] 

Erick Erickson commented on SOLR-5146:
--------------------------------------

Shalin:

Let me know how I can help. The last two months I've been pretty much out of touch, culminating
in a cross-country move. But we're at our destination now so I have some bandwidth, maybe....

Best,
Erick

> Figure out what it would take for lazily-loaded cores to play nice with SolrCloud
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-5146
>                 URL: https://issues.apache.org/jira/browse/SOLR-5146
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>    Affects Versions: 4.5, 5.0
>            Reporter: Erick Erickson
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 5.0
>
>
> The whole lazy-load core thing was implemented with non-SolrCloud use-cases in mind.
There are several user-list threads that ask about using lazy cores with SolrCloud, especially
in multi-tenant use-cases.
> This is a marker JIRA to investigate what it would take to make lazy-load cores play
nice with SolrCloud. It's especially interesting how this all works with shards, replicas,
leader election, recovery, etc.
> NOTE: This is pretty much totally unexplored territory. It may be that a few trivial
modifications are all that's needed. OTOH, It may be that we'd have to rip apart SolrCloud
to handle this case. Until someone dives into the code, we don't know.



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