[jira] Updated: (CASSANDRA-678) row-level cache

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-678?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-678:
-------------------------------------

    Attachment: 0005-combine-SSTable-keycaches-into-one-at-CFS-level.-do-no.txt
                0004-make-rowcache-keycache-configurable-per-CF.txt
                0003-instrumentation.txt
                0002-clean-up-onstart-to-fix-cache-size-calculation.txt
                0001-basic-caching.txt

> row-level cache
> ---------------
>
>                 Key: CASSANDRA-678
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-678
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 0.9
>
>         Attachments: 0001-basic-caching.txt, 0002-clean-up-onstart-to-fix-cache-size-calculation.txt, 0003-instrumentation.txt, 0004-make-rowcache-keycache-configurable-per-CF.txt, 0005-combine-SSTable-keycaches-into-one-at-CFS-level.-do-no.txt
>
>
> We have a key cache but that doesn't help mitigate the expensive deserialization of the actual data to return.
> Adding a row-level cache should be fairly simple using a ConcurrentLinkedHashMap<String [key], ColumnFamily> structure.  (We will only cache whole rows at a time, since already know how to query on those in-memory.  This limits us to CFs full of narrow rows but that is a common enough use case to be worth tackling if it can be done simply enough.)

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