Sijie Guo created BOOKKEEPER-494:
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             Summary: Ability to add new ledger disk to a bookie
                 Key: BOOKKEEPER-494
                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-494
             Project: Bookkeeper
          Issue Type: New Feature
          Components: bookkeeper-server
            Reporter: Sijie Guo
             Fix For: 4.3.0


Currently we had *Cookie* for each bookie to record the directories it used for 
ledgers. So when the admin wants to add a new disk for a bookie, we can't 
change the configuration and restart it simply. an admin command would be added 
to help admin guys adding a new disk to a bookie and upgrading its *Cookie*.

Adding a brand new disk would be quite easy. But if we want to remove a disk or 
replace a disk, it isn't trivial. BOOKKEEPER-201 would take care of 
removing/replace a disk.



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