Benjamin Lerer updated CASSANDRA-12969:
    Issue Type: Improvement  (was: Bug)

> Index: index can significantly slow down boot
> ---------------------------------------------
>                 Key: CASSANDRA-12969
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12969
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Corentin Chary
>             Fix For: 3.x
>         Attachments: 0004-index-do-not-re-insert-values-in-IndexInfo.patch
> During startup, each existing index is opened and marked as built by adding 
> an entry in "IndexInfo" and forcing a flush. Because of that we end up 
> flushing one sstable per index. On systems on HDD this can take minutes for 
> nothing.
> Thw following patch allows to avoid creating useless new sstables if the 
> index was already marked as built and will greatly reduce the startup time 
> (and improve availability during restarts).

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