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https://issues.apache.org/jira/browse/BOOKKEEPER-300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13415129#comment-13415129
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Sijie Guo commented on BOOKKEEPER-300:
--------------------------------------

@Vinay, 

>> Cookie

It would be better to encode Cookie in protobuf for future extension. And you 
need to resolve original cookie format and protobuf encoded format for backward 
compatibility. (may be you could refer the changes on LedgerMetadata in 
BOOKKEEPER-303)

And for my proposal, there is two changes need for bookie format. I think it 
would be two subtasks to handle it, which make things clearly. one is 
instance-id and cookie format improvement, the other one is providing format 
interface in LedgerManager.

but before implemented it, I think it would be better to see others' comments 
first. 

@Flavio, could you take a look at this jira?
                
> Create Bookie format command
> ----------------------------
>
>                 Key: BOOKKEEPER-300
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-300
>             Project: Bookkeeper
>          Issue Type: New Feature
>          Components: bookkeeper-server
>    Affects Versions: 4.1.0
>            Reporter: Rakesh R
>         Attachments: BOOKKEEPER-300.patch
>
>
> Provide a bookie format command. Then the admin would just have to run the 
> command on each machine, which will prepare the bookie env
> +Zookeeper paths (znodes):+
> - ledger's root path
> - bookie's available path
> +Directories:+
> - Journal directories
> - Ledger directories

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