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https://issues.apache.org/jira/browse/BOOKKEEPER-879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15025620#comment-15025620
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Matteo Merli commented on BOOKKEEPER-879:
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Ledger z-node already has a ctime that can be checked from outside and
eventually exposed from API.
> Record ledger creation time
> ---------------------------
>
> Key: BOOKKEEPER-879
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-879
> Project: Bookkeeper
> Issue Type: New Feature
> Components: bookkeeper-client, bookkeeper-server
> Affects Versions: 4.3.1
> Reporter: Enrico Olivelli
>
> I think that a creation timestamp would be very useful and it does not cost
> very much. It would be an immutable value.
> Nowadays (on 4.3.1) I must keep that info together with the id of the ledger,
> for instance in zookeeper, but if that reference gets lost there is now way
> to know how old a ledger is.
> I think that this timestamp should be captured on client while calling
> createLedger or asyncCreateLedger.
> In addition to this very common field maybe it would be useful to add a
> custom byte[] field named "custom client data" in order to let the client
> 'describe' the ledger without the need of extra data on Zookeeper.
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