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https://issues.apache.org/jira/browse/BOOKKEEPER-181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266175#comment-13266175
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Flavio Junqueira commented on BOOKKEEPER-181:
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Hi Roger.
bq. There is always the possibility that a newly created ledger does not get
recorded by the client, and is thus left dangling.
As part of a create ledger call, we currently create a metadata znode for the
ledger. Consequently, there is a record of the ledger being created even before
the client starts writing to it. If no client ever deletes that ledger is a
separate issue.
> Scale hedwig
> ------------
>
> Key: BOOKKEEPER-181
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-181
> Project: Bookkeeper
> Issue Type: Improvement
> Components: bookkeeper-server, hedwig-server
> Reporter: Sijie Guo
> Assignee: Sijie Guo
> Fix For: 4.2.0
>
> Attachments: hedwigscale.pdf, hedwigscale.pdf
>
>
> Current implementation of Hedwig and BookKeeper is designed to scale to
> hundreds of thousands of topics, but now we are looking at scaling them to
> tens to hundreds of millions of topics, using a scalable key/value store such
> as HBase.
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