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https://issues.apache.org/jira/browse/ZOOKEEPER-486?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flavio Paiva Junqueira updated ZOOKEEPER-486:
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Status: Open (was: Patch Available)
Ben, this patch is broken. It is missing a few classes, like LedgerCache and
LedgerEntryPage.
> Improve bookie performance for large number of ledgers
> ------------------------------------------------------
>
> Key: ZOOKEEPER-486
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-486
> Project: Zookeeper
> Issue Type: Improvement
> Components: contrib-bookkeeper
> Reporter: Flavio Paiva Junqueira
> Assignee: Benjamin Reed
> Attachments: ZOOKEEPER-486.patch, ZOOKEEPER-486.patch,
> ZOOKEEPER-486.patch
>
>
> If we write simultaneously to a large number of ledgers on a bookie, then
> performance drops significantly due to more seeks on the ledger device. In
> such cases, we should be clustering ledgers into files to reduce the number
> of seeks, and performing sequential writes on each file. Clustering ledgers
> will impact read performance, so we would to have a knob to control such a
> feature.
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