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From "Ariel Weisberg (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-10511) Index summary downsampling prevents mmap access of large files after restart
Date Mon, 23 Nov 2015 20:11:10 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-10511?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ariel Weisberg updated CASSANDRA-10511:
---------------------------------------
    Component/s: Local Write-Read Paths

> Index summary downsampling prevents mmap access of large files after restart
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10511
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10511
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local Write-Read Paths
>            Reporter: Benedict
>            Assignee: Ariel Weisberg
>
> {{SSTableReader.cloneWithNewSummarySampleLevel}} constructs a {{SegmentedFile.Builder}}
but never populates it with any boundaries. For files larger than 2Gb, this will result in
their being accessed via buffered io after a restart.



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