[jira] [Commented] (SOLR-11920) Differential file copy for IndexFetcher

["Ishan Chattopadhyaya (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16376649#comment-16376649 ] 

Ishan Chattopadhyaya commented on SOLR-11920:
---------------------------------------------

I just tested this patch on Windows. The TestReplicationHandler was failing for me intermittently on Windows (without this patch), and the same behaviour continued after the patch. I couldn't think from the failure logs that this patch adversely affected anything there. The TestStressRecovery passed without any issues.

I'm planning to commit this soon. If someone has time to review this, please let me know. :-)

> Differential file copy for IndexFetcher
> ---------------------------------------
>
>                 Key: SOLR-11920
>                 URL: https://issues.apache.org/jira/browse/SOLR-11920
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Major
>         Attachments: SOLR-11920.patch, SOLR-11920.patch
>
>
> In the case of fullCopy=true, all files are copied over from the leader/master irrespective of whether or not that exact file exists with the replica/slave. This is wasteful, esp. in tlog replicas or pull replicas, when only a fraction of the total files are different.
> This stems from SOLR-11815.



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