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https://issues.apache.org/jira/browse/ZOOKEEPER-465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975616#action_12975616
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Flavio Junqueira commented on ZOOKEEPER-465:
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We assume that there is a single client writing to a ledger. Do you have a use
case for multiple clients writing to the same ledger? You may consider instead
having multiple ledgers being written concurrently, using the same set of
bookies. We have tested with up to 20,000 concurrent ledgers and we didn't
notice a performance penalty on the aggregate performance. I'm not sure if it
suits your case, though.
> Ledger size in bytes
> --------------------
>
> Key: ZOOKEEPER-465
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-465
> Project: ZooKeeper
> Issue Type: New Feature
> Components: contrib-bookkeeper
> Reporter: Flavio Junqueira
> Fix For: 3.3.3, 3.4.0
>
>
> It is currently easy to know how many entries a ledger has, but there is no
> easy way to know the total number of bytes in a ledger. The idea of this jira
> is to add a method that gives the number of bytes in a closed ledger. My
> current idea is to simply have the writer counting the number of bytes
> written and store it to ZooKeeper.
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