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https://issues.apache.org/jira/browse/SOLR-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Noble Paul reassigned SOLR-1175:
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Assignee: Noble Paul
> disable replication on master side
> ----------------------------------
>
> Key: SOLR-1175
> URL: https://issues.apache.org/jira/browse/SOLR-1175
> Project: Solr
> Issue Type: New Feature
> Components: replication (java)
> Affects Versions: 1.4
> Environment: any
> Reporter: Jianhan
> Assignee: Noble Paul
> Priority: Minor
> Fix For: 1.4
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> In an environment where one master and several slaves are deployed, it
> usually takes more effort to discover all the slaves and disable replication
> on slave side (which is available right now), and it would be much easier to
> disable it on master instance (when, for example, there is a need to rebuild
> the index, yet search has to continue). The following is the original email
> describing a scenario when this feature is needed.
> Hi,
> Occasionally, we want to build our indexes from scratch, and during this
> period we want our search continue to work. Here are the steps that I think
> will do it
> 1. on all slaves: disable replication
> 2. on master: stop the server
> 3. on master: delete all the documents
> 4. on master: restart the server
> 5. on master: index all documents
> 6. on slaves: enable replication
> The only problem is: step 1 and 6. We may schedule any time to rebuild
> indexes and it is an automated process. It is possible to let the master to
> disable replication on all slaves, but then we have to discover all the
> slaves automatically, also exceptions may happen, e.g. a slave may be down at
> the time and then restarted later on. Anyhow it becomes an unreliable
> process. So I am thinking of somehow disabling replication on the master side
> during reindex, i.e. set a state on master so that any request for
> replication will be ignored. That all the steps described above will be on
> master side only.
> Is that possible?
> By the way, I am talking about solr 1.4. I looked at how 1.3 works, and
> noticed that in 1.3 there is a way to disable replication on master side:
> shutdown rsyncd, so I guess it would be nice to have something equivalent in
> solr 1.4.
> Thanks,
> Jianhan
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