[jira] [Commented] (HBASE-10909) Abstract out ZooKeeper usage in HBase - phase 1

["stack (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-10909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14122411#comment-14122411 ] 

stack commented on HBASE-10909:
-------------------------------

[~mantonov] We can resolve this now?

> Abstract out ZooKeeper usage in HBase - phase 1
> -----------------------------------------------
>
>                 Key: HBASE-10909
>                 URL: https://issues.apache.org/jira/browse/HBASE-10909
>             Project: HBase
>          Issue Type: Umbrella
>          Components: Consensus, Zookeeper
>    Affects Versions: 0.99.0
>            Reporter: Mikhail Antonov
>            Assignee: Mikhail Antonov
>             Fix For: 0.99.0, 2.0.0
>
>         Attachments: HBaseConsensus.pdf, HBaseConsensus.pdf, HBaseConsensus.pdf
>
>
> As some sort of follow-up or initial step towards HBASE-10296.
> Whatever consensus algorithm/library may be the chosen, perhaps one of first practical steps towards this goal would be to better abstract ZK-related API and details, which are now throughout the codebase (mostly leaked throuth ZkUtil, ZooKeeperWatcher and listeners).
> This jira is umbrella for relevant subtasks. Design doc is attached, for comments/questions there's a google doc linked.
> This issue covers phase-1 of abstraction work, which includes:
>  - infrastructure to support pluggable coordinated state managers
>  - abstraction of region opening/closing/splitting/merging operations
>  - abstraction of admin operation handlers like CreateTableHandler
>  - abstract ZKTable (reworked it to interface and implementation, allowing for new system tables-based impl to be developed)
>  - WAL splitting abstraction.



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