[jira] Resolved: (SOLR-524) snappuller has limitation w/r/t/ handling multiple web apps

["Hoss Man (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hoss Man resolved SOLR-524.
---------------------------

    Resolution: Duplicate

The scripts are currently designed with the assumption that each index (regardless of whether it is from a separate core or a separate webapp) be replicated using a distinct instance of rsyncd (with a distinct port number)

there are a few advantages to this approach: notably that it's easy to disable replication for a single index while you do maintenance on the master.

That said: there are are plenty of compelling reasons to simplify and/or add alternate mechanisms for replicating multiple indexes ... but we already have an issue tracking this (SOLR-433) So i'm going to resolve this asa dup.

Ezra: please take a look at SOLR-433 and the approaches being taken in that issue.

> snappuller has limitation w/r/t/ handling multiple web apps
> -----------------------------------------------------------
>
>                 Key: SOLR-524
>                 URL: https://issues.apache.org/jira/browse/SOLR-524
>             Project: Solr
>          Issue Type: Improvement
>          Components: replication
>    Affects Versions: 1.2
>         Environment: Linux (CentOS release 5 (Final))
> Java JDK 6
>            Reporter: Ezra Epstein
>            Priority: Minor
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
>
> The snappuller has a limitation which makes it hard to use for replicating the indices for multiple webapps.  In particular, by changing:
> # rsync over files that have changed
> rsync -Wa${verbose}${compress} --delete ${sizeonly} \
> ${stats} rsync://${master_host}:${rsyncd_port}/solr/${name}/ ${data_dir}/${name}-wip
> to: 
> # rsync over files that have changed
> rsync -Wa${verbose}${compress} --delete ${sizeonly} \
> ${stats} rsync://${master_host}:${rsyncd_port}/${rsync_module_path}/${name}/ ${data_dir}/${name}-wip
> and adding an rsync_module_path variable to scripts.conf, plus giving it a default value of "solr" before the 'unset' commands at the top of the snappuller script, I've worked around the issue.  Still, it seems better to not hard-code the module name ([solr]) and also to allow some flexibility in the location of the data files under that module.  This is req'd for multiple webapps since they won't share a data folder.

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