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https://issues.apache.org/jira/browse/ZOOKEEPER-465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975921#action_12975921
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Flavio Junqueira commented on ZOOKEEPER-465:
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To write to a ledger, a client must first create the ledger, and only one
client can create a ledger with a given identifier. We enforce this behavior by
using the sequence flag in ZooKeeper when creating the znode that will
represent the newly created ledger. Bookies, however, do not enforce that a
single client writes to a ledger, so we rely upon the behavior of the client.
> 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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