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Posted to oak-issues@jackrabbit.apache.org by "Amit Jain (JIRA)" <ji...@apache.org> on 2016/10/07 10:47:20 UTC

[jira] [Commented] (OAK-4837) Improved caching for DataStore

    [ https://issues.apache.org/jira/browse/OAK-4837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15554782#comment-15554782 ] 

Amit Jain commented on OAK-4837:
--------------------------------

Reworked caching work done at https://github.com/amit-jain/jackrabbit-oak/compare/trunk...amit-jain:OAK-4837
The patch is fully tested including running on Adobe AEM.

> Improved caching for DataStore
> ------------------------------
>
>                 Key: OAK-4837
>                 URL: https://issues.apache.org/jira/browse/OAK-4837
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: blob
>            Reporter: Amit Jain
>            Assignee: Amit Jain
>              Labels: performance
>
> The current CachingDataStore implementation used with S3DataStore has certain problems:
> * Lack of stats to show hit rate/miss rates for files being requested for downloads
> * Lack of stats for async uploads
> * CachingDataStore starts proactively downloading files in the background when a call to {{getRecord}} is made.
> * Async upload functionality leaks into Backend implementations, LocalCache classes.
> * The call to {{DataStore#getRecord()}} which makes multiple calls to backends which is problematic for S3 (i.e. when not being served bu cache)
> * There is some functionality which is not used with Oak like length cache, sync/async touch etc. which can be removed and code simplified.



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