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Posted to issues@lucene.apache.org by "Yonik Seeley (Jira)" <ji...@apache.org> on 2020/02/19 17:56:00 UTC

[jira] [Updated] (SOLR-13813) Shared storage online split support

     [ https://issues.apache.org/jira/browse/SOLR-13813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yonik Seeley updated SOLR-13813:
--------------------------------
    Attachment: SOLR-13813.patch
        Status: Open  (was: Open)

> Shared storage online split support
> -----------------------------------
>
>                 Key: SOLR-13813
>                 URL: https://issues.apache.org/jira/browse/SOLR-13813
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Yonik Seeley
>            Priority: Major
>         Attachments: SOLR-13813.patch
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> The strategy for online shard splitting is the same as that for normal (non SHARED shards.)
> During a split, the leader will forward updates to sub-shard leaders, those updates will be buffered by the transaction log while the split is in progress, and then the buffered updates are replayed.
> One change that was added was to push the local index to blob store after buffered updates are applied (but before it is marked as ACTIVE):
> See https://github.com/apache/lucene-solr/commit/fe17c813f5fe6773c0527f639b9e5c598b98c7d4#diff-081b7c2242d674bb175b41b6afc21663
> This issue is about adding tests and ensuring that online shard splitting (while updates are flowing) works reliably.



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