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From "Amit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-3253) Support caching in FileDataStoreService
Date Mon, 03 Oct 2016 03:11:20 GMT

    [ https://issues.apache.org/jira/browse/OAK-3253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15541412#comment-15541412
] 

Amit Jain commented on OAK-3253:
--------------------------------

[~shgupta@adobe.com]

In the {{CachingFDS}} there is not override of {{getOrCreateReferenceKey}} and so the method
from {{CachingDataStore}} would be used [1]. This does not seem right for applications using
a shared data store as the implementation for {{FileDataStore}} is different [2].

[1] https://github.com/apache/jackrabbit/blob/b252e505e34b03638207e959aaafce7c480ebaaa/jackrabbit-data/src/main/java/org/apache/jackrabbit/core/data/CachingDataStore.java#L679
[2] https://github.com/apache/jackrabbit/blob/b252e505e34b03638207e959aaafce7c480ebaaa/jackrabbit-data/src/main/java/org/apache/jackrabbit/core/data/FileDataStore.java#L445

> Support caching in FileDataStoreService
> ---------------------------------------
>
>                 Key: OAK-3253
>                 URL: https://issues.apache.org/jira/browse/OAK-3253
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: blob
>    Affects Versions: 1.3.3
>            Reporter: Shashank Gupta
>            Assignee: Shashank Gupta
>            Priority: Blocker
>              Labels: candidate_oak_1_0, candidate_oak_1_2, docs-impacting, features,
performance
>             Fix For: 1.4, 1.3.15
>
>         Attachments: OAK-3253.txt, org.apache.jackrabbit.oak.plugins.blob.datastore.FileDataStore.config
>
>
> FDS on SAN/NAS storage is not efficient as it involves network call. In OAK. indexes
are stored SAN/NAS and even idle system does lot of read system generated data. 
> Enable caching in FDS so the reads are done locally and async upload to SAN/NAS
> See [previous discussions|https://issues.apache.org/jira/browse/OAK-3005?focusedCommentId=14700801&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14700801]



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