[CASSANDRA-1878] Minimize Key Cache Invalidation by Compaction - ASF JIRA

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Details

Type: Improvement
Status: Resolved
Priority: Normal
Resolution: Fixed
Fix Version/s: 0.6.9, 0.7.0 rc 3
Component/s: None
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Description

Currently, compactions invalidate key cache entries that pointed to the SSTables that were compacted. This results in a sudden increase in the number of seeks necessary for reads immediately after compaction. When writing out a new SSTable after a compaction, it seems like it should be possible to store a list of keys that are currently cached but would be invalidated along with their new position in the new SSTable. Matt Dennis also seems to think this would be relatively easy to do.

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1878.txt
18/Dec/10 15:42
4 kB
Jonathan Ellis
1878_v2.txt
19/Dec/10 17:34
3 kB
T Jake Luciani

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Assignee:: Jonathan Ellis

Reporter:: Tom Hobbs

Authors:: Jonathan Ellis

Reviewers:: T Jake Luciani

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Dates

Created:: 18/Dec/10 00:15

Updated:: 16/Apr/19 09:33

Resolved:: 20/Dec/10 04:45