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https://issues.apache.org/jira/browse/CASSANDRA-946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-946:
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Attachment: 946-v4.txt
Committed the "fix utils" patch separately. Removed old patch versions to
reduce confusion.
Attached v4 with some cleanup, and renaming to "preloadRowCache." Changes to
CompactionManager were unnecessary since compacting doesn't actually change the
data involved, so removed that. Load from the CFS constructor instead the way
you had it originally.
With the removal of the compaction code, preloadRowCache is never called
anywhere.
Checking metadata.rowCacheSize == 1 is broken since this is the absolute size
of the cache, not the configuration size. You'll have to preserve the original
configuration string somewhere to check.
This adds the preload cache option to the Thrift call, but doesn't update
system_add_column_family. Which is why it fails to compile...
I shouldn't be reviewing patches that haven't been compiled, let alone tested.
Please attach screenshots of your testing to the next one.
> Add a configuration and implementation to populate the data into memory
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-946
> URL: https://issues.apache.org/jira/browse/CASSANDRA-946
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.7
> Environment: Linux, Cassandra
> Reporter: Vijay
> Assignee: Vijay
> Priority: Minor
> Fix For: 0.7, 0.8
>
> Attachments: 946-Add_Config_v003.txt, 946-Documentation_v002.txt,
> 946-Load_Data_v003.txt, 946-v4.txt, 946_Fix_Utils_v003.txt, screenshot.png
>
>
> Proactively load data into the memory when the node is started, there will be
> a configuration to enable this function and will be per Columnfamily. The
> requirement is to speed up the reads for data which can reside 100% of in the
> memory.... In addition to enabling the RowCache to 100% we can do this so as
> upgrades or any other means of restart will not clear the cache in the server.
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