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https://issues.apache.org/jira/browse/BOOKKEEPER-518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sijie Guo updated BOOKKEEPER-518:
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Fix Version/s: (was: 4.3.0)
> Lazily load hedwig metadata for different types of requests
> -----------------------------------------------------------
>
> Key: BOOKKEEPER-518
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-518
> Project: Bookkeeper
> Issue Type: Sub-task
> Components: hedwig-client, hedwig-server
> Reporter: Sijie Guo
> Assignee: Jiannan Wang
>
> Currently, acquire a topic needs to load both persistence info and
> subscriptions info at the same time. only after that, the topic acquisition
> could succeed. but it seems that, for a sub/closesub/unsub request, we just
> need subscription info. for a pub request, we just need persistence info.
> especially, for a subscriber requests, we don't need to create a new ledger
> if there is no messages. we could delay provisioning ledger when messages
> arrive. otherwise, it introduced unnecessary metadata creation.
> for some applications, lazily loading might be necessary. for some
> applications, it might be not. it should be configurable.
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