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From "Ishan Chattopadhyaya (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11920) Differential file copy for IndexFetcher
Date Sat, 27 Jan 2018 23:06:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16342364#comment-16342364
] 

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

Thanks for looking at this.

bq. .. local copy instead of the hard link approach ...
Need to verify if this works on Windows. If not, maybe move could also work here?

bq. Maybe we should turn the two INFO log lines into DEBUG? I know they are currently INFO
as well but seems like we should change it
I'm fine either ways. On the field, I've found this to be helpful information looking at logs
from production servers. Though, if you insist, I'm okay with making them DEBUG.

> 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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