*Problem: * Currently the ledger id is long, which it should be 64-bits. However currently bookkeeper only can generate 32-bits ledger id as zookeeper's sequence znode only produce 32-bits.
This problem was basically raised before at BOOKKEEPER-421. Jiannan has already done fair amount of work on this and there were several patches for it. This email thread is to start the discussion for 64-bits ledger id support in bookkeeper. *Discuss*: Based on bookkeeper-421, the changes will relatively happen in following places. Assume the metadata store is ZooKeeper. 1. How to generate 64-bits ledger id? (64 Bits Ledger ID Generation <https://issues.apache.org/jira/browse/BOOKKEEPER-552>) 2. How to store the 64-bits ledger id in zookeeper? (New LedgerManager for 64 Bits Ledger ID Management in ZooKeeper <https://issues.apache.org/jira/browse/BOOKKEEPER-553>) 3. How can the garbage collect handle correctly with 64-bits ledger id? ( https://issues.apache.org/jira/browse/BOOKKEEPER-553?focusedCommentId=13558192&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13558192 ) 4. How can we upgrade current HierarchicalLedgerManager to support 64-bits. [??] Feel free to take a look at those tickets and make any proposals. - Sijie
