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https://issues.apache.org/jira/browse/CASSANDRA-193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stu Hood updated CASSANDRA-193:
-------------------------------
Attachment: 193-6-inverted-filter.diff
New version of patch 6 to resolve the Cachetable/rendezvous issues I noticed
last night.
I don't see any more bugs, but I did some testing with a table containing 10^6
keys, and a Readonly compaction took 2 minutes (!). Hopefully a little bit of
profiling will expose the issue quickly, because I can understand that
performance like that should prevent merging this patch. I'll try and get a new
version out this evening.
> Proactive repair
> ----------------
>
> Key: CASSANDRA-193
> URL: https://issues.apache.org/jira/browse/CASSANDRA-193
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Stu Hood
> Fix For: 0.5
>
> Attachments: 193-1-tree-preparation.diff,
> 193-1-tree-preparation.diff, 193-2-tree.diff, 193-2-tree.diff,
> 193-3-aes-preparation.diff, 193-3-aes-preparation.diff, 193-4-aes.diff,
> 193-4-aes.diff, 193-5-manual-repair.diff, 193-6-inverted-filter.diff,
> 193-6-inverted-filter.diff, 193-breakdown.txt, mktree-and-binary-tree.png
>
>
> Currently cassandra supports "read repair," i.e., lazy repair when a read is
> done. This is better than nothing but is not sufficient for some cases (e.g.
> catastrophic node failure where you need to rebuild all of a node's data on a
> new machine).
> Dynamo uses merkle trees here. This is harder for Cassandra given the CF
> data model but I suppose we could just hash the serialized CF value.
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