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https://issues.apache.org/jira/browse/BOOKKEEPER-879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15124982#comment-15124982
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Flavio Junqueira commented on BOOKKEEPER-879:
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I think you need to bump the metadata version number and you could check the
version and call methods with different signatures to deal with the creation
time. Also, it is not pretty that {{MSLedgerManagerFactory}} isn't really
setting the field, perhaps we should have a default way of generating a
creation time, like having the client doing it or using a zk znode for that
(e.g., create a znode, get the ctime, delete the znode).
> 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
> Fix For: 4.4.0
>
>
> 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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