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From "Aleksey Yeschenko (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-8078) Add a detailed compaction history table to show file lineage
Date Tue, 07 Oct 2014 22:59:34 GMT


Aleksey Yeschenko updated CASSANDRA-8078:
    Fix Version/s:     (was: 2.1.0)

> Add a detailed compaction history table to show file lineage
> ------------------------------------------------------------
>                 Key: CASSANDRA-8078
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: Cassandra on any platform
>            Reporter: Maohua
>              Labels: features, newbie
>             Fix For: 2.1.1
>   Original Estimate: 504h
>  Remaining Estimate: 504h
> Currently system.compaction_history only contains summary information about a compaction,
which is useful if users only care about when the compaction occurs and the benefits generated
by the compaction. However, it does not show the detailed src->dst SSTable mappings. For
example, it does not show which SSTable is created or deleted as a result of compaction. As
a result, when users want to backup or archive data files, they may end up backing-up different
SSTables that represent exactly the same user data. 
> It will be great if there is a system.compaction_detailed_history table that remembers
the detailed lineage of SSTables so the backup task does not have to figure out the duplicate
data on its own.

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