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From "Jothi Padmanabhan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5765) Improve memory cache utilization in BackupStore (while supporting Mark/Reset)
Date Mon, 22 Jun 2009 10:30:07 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jothi Padmanabhan updated HADOOP-5765:
--------------------------------------

    Component/s: mapred

> Improve memory cache utilization in BackupStore (while supporting Mark/Reset)
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-5765
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5765
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Jothi Padmanabhan
>            Assignee: Jothi Padmanabhan
>
> HADOOP-5266 introduced support for Mark/Reset of Values Iterator by backing up keys and
values to a BackupStore. The current design does not create a memory segment once a file segment
has been created, even if space is available. The design could be optimized to consider memory
for a new segment irrespective of where the previous segments have been created.

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