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https://issues.apache.org/jira/browse/MAVIBOT-3?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13741031#comment-13741031
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Emmanuel Lecharny commented on MAVIBOT-3:
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FTR, I counted the number of updates when we add 10 000 elements in a BTree :
- The RecordManager header is updated 137 071 times
- The BTree header is updated 39 996 times
In the mean time, we have flushed 39 996 PageIOs.
We can do better !
I'm quite sure we can update the BTree Header only once per Add operation, the
very same for the RM header.
> Update the Header only once when updating a BTree
> -------------------------------------------------
>
> Key: MAVIBOT-3
> URL: https://issues.apache.org/jira/browse/MAVIBOT-3
> Project: Mavibot
> Issue Type: Improvement
> Affects Versions: 1.0.0-M1
> Reporter: Emmanuel Lecharny
> Assignee: Emmanuel Lecharny
> Priority: Critical
> Fix For: 1.0.0-M2
>
>
> We currently update the RM Header for every page we write on disk. This is
> extremely costly. We could gather all the changes and update the RM header
> only once.
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