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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAVIBOT-35) Add a mechanism to update pending pages
Date Wed, 23 Jul 2014 23:52:39 GMT

     [ https://issues.apache.org/jira/browse/MAVIBOT-35?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Lecharny updated MAVIBOT-35:
-------------------------------------

    Fix Version/s:     (was: 1.0.0-M5)
                   1.0.0-M6

> Add a mechanism to update pending pages
> ---------------------------------------
>
>                 Key: MAVIBOT-35
>                 URL: https://issues.apache.org/jira/browse/MAVIBOT-35
>             Project: Mavibot
>          Issue Type: Improvement
>    Affects Versions: 1.0.0-M3
>            Reporter: Emmanuel Lecharny
>            Assignee: Emmanuel Lecharny
>             Fix For: 1.0.0-M6
>
>
> Currently, we store all the pages to be written in a list of pending pages (they will
be flushed on disk when the transaction will be done).
> It would be very efficient to have a way to update a page which is in this pending list
instead of writing it again if we modify it at some point in the same transaction. In other
words, when we detect that we are going to modify a page which is already stored in the pending
page, then we should not create a new page from it, but instead apply the changes on the page
itself.
> That would save a huge amount of disk access...



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