[jira] Commented: (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:comment-tabpanel&focusedCommentId=12797533#action_12797533 ] 

Jonathan Ellis commented on CASSANDRA-678:
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I have the basic functionality working for reads now.  Next: cache invalidation on insert.

> 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
>
>
> 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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