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https://issues.apache.org/jira/browse/CASSANDRA-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267589#comment-13267589
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Vijay commented on CASSANDRA-3762:
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>>> Why don't you serialize data (payload) of the caches
Well the payloads can be in GB's when using Serialized cache and when you are
trying to load the old cache you will see inconsistencies between the cache
save.
We cannot rely on shutdown hooks to make the data consistent because
(http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread))
OS has timeouts on the shutdown and it doesnt help it when there are power
failures. The main problem with the RowCache Values are that they are mutable
and Keycache values are immutable.
The main pain is during startup is keycache, but i dont see why it will be a
pain to load the rowcache.
> AutoSaving KeyCache and System load time improvements.
> ------------------------------------------------------
>
> Key: CASSANDRA-3762
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3762
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.2
> Reporter: Vijay
> Assignee: Vijay
> Priority: Minor
> Fix For: 1.2
>
> Attachments: 0001-CASSANDRA-3762-v2.patch,
> 0001-CASSANDRA-3762-v3.patch, 0001-SavedKeyCache-load-time-improvements.patch
>
>
> CASSANDRA-2392 saves the index summary to the disk... but when we have saved
> cache we will still scan through the index to get the data out.
> We might be able to separate this from SSTR.load and let it load the index
> summary, once all the SST's are loaded we might be able to check the
> bloomfilter and do a random IO on fewer Index's to populate the KeyCache.
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