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From "Vijay (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-3762) AutoSaving KeyCache and System load time improvements.
Date Wed, 30 May 2012 07:27:23 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vijay updated CASSANDRA-3762:
-----------------------------

    Attachment: 0001-CASSANDRA-3762-v5.patch

>>> What if we redefined the problem a bit? Instead of having totalBytes/bytesComplete
in CompactionInfo, we could have long total/complete and String units. Then we could just
return progress in terms of key count for cache saving.

Done! 
BTW: In addition there is a minor fix for NPE on CompactionInfo.getID().toString()
                
> 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-CASSANDRA-3762-v4.patch,
0001-CASSANDRA-3762-v5.patch, 0001-CASSANDRA-3762-v6.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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