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From "Benjamin Lerer (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-12969) Index: index can significantly slow down boot
Date Wed, 30 Nov 2016 08:29:58 GMT


Benjamin Lerer updated CASSANDRA-12969:
    Reviewer: Sam Tunnicliffe
      Status: Patch Available  (was: Open)

> Index: index can significantly slow down boot
> ---------------------------------------------
>                 Key: CASSANDRA-12969
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          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

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