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https://issues.apache.org/jira/browse/SOLR-9961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16875448#comment-16875448
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Lucene/Solr QA commented on SOLR-9961:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 6s{color}
| {color:red} SOLR-9961 does not apply to master. Rebase required? Wrong
Branch? See
https://wiki.apache.org/solr/HowToContribute#Creating_the_patch_file for help.
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|| Subsystem || Report/Notes ||
| JIRA Issue | SOLR-9961 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12973125/SOLR-9961.patch |
| Console output |
https://builds.apache.org/job/PreCommit-SOLR-Build/466/console |
| Powered by | Apache Yetus 0.7.0 http://yetus.apache.org |
This message was automatically generated.
> RestoreCore needs the option to download files in parallel.
> -----------------------------------------------------------
>
> Key: SOLR-9961
> URL: https://issues.apache.org/jira/browse/SOLR-9961
> Project: Solr
> Issue Type: Improvement
> Components: Backup/Restore
> Affects Versions: 6.2.1
> Reporter: Timothy Potter
> Priority: Major
> Attachments: SOLR-9961.patch, SOLR-9961.patch, SOLR-9961.patch
>
>
> My backup to cloud storage (Google cloud storage in this case, but I think
> this is a general problem) takes 8 minutes ... the restore of the same core
> takes hours. The restore loop in RestoreCore is serial and doesn't allow me
> to parallelize the expensive part of this operation (the IO from the remote
> cloud storage service). We need the option to parallelize the download (like
> distcp).
> Also, I tried downloading the same directory using gsutil and it was very
> fast, like 2 minutes. So I know it's not the pipe that's limiting perf here.
> Here's a very rough patch that does the parallelization. We may also want to
> consider a two-step approach: 1) download in parallel to a temp dir, 2)
> perform all the of the checksum validation against the local temp dir. That
> will save round trips to the remote cloud storage.
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