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https://issues.apache.org/jira/browse/SOLR-13101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17001717#comment-17001717
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ASF subversion and git services commented on SOLR-13101:
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Commit 036ce539525aa9c0eb0270d94e4105cd1a0313e9 in lucene-solr's branch
refs/heads/jira/SOLR-13101 from Bilal Waheed
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=036ce53 ]
SOLR-13101: Concurrency tests for SHARED collection. (#1081)
* SOLR-13101: Concurrency tests for SHARED collection.
-Concurrency tests for SHARED collection.
-On core container shutdown, shutdown the background blob delete manager too.
-Use correct casing for SharedCoreStage enum.
-Added INDEXING_BATCH_FINISHED to indicate the end of a batch
(BLOB_PUSH_FINISHED does not help if push itself runs into error)
* -CR feedback.
> Shared storage support in SolrCloud
> -----------------------------------
>
> Key: SOLR-13101
> URL: https://issues.apache.org/jira/browse/SOLR-13101
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Reporter: Yonik Seeley
> Priority: Major
> Time Spent: 7h 50m
> Remaining Estimate: 0h
>
> Solr should have first-class support for shared storage (blob/object stores
> like S3, google cloud storage, etc. and shared filesystems like HDFS, NFS,
> etc).
> The key component will likely be a new replica type for shared storage. It
> would have many of the benefits of the current "pull" replicas (not indexing
> on all replicas, all shards identical with no shards getting out-of-sync,
> etc), but would have additional benefits:
> - Any shard could become leader (the blob store always has the index)
> - Better elasticity scaling down
> - durability not linked to number of replcias.. a single replica could be
> common for write workloads
> - could drop to 0 replicas for a shard when not needed (blob store always
> has index)
> - Allow for higher performance write workloads by skipping the transaction
> log
> - don't pay for what you don't need
> - a commit will be necessary to flush to stable storage (blob store)
> - A lot of the complexity and failure modes go away
> An additional component a Directory implementation that will work well with
> blob stores. We probably want one that treats local disk as a cache since
> the latency to remote storage is so large. I think there are still some
> "locking" issues to be solved here (ensuring that more than one writer to the
> same index won't corrupt it). This should probably be pulled out into a
> different JIRA issue.
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