[jira] [Commented] (HDFS-10630) Federation State Store

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

    [ https://issues.apache.org/jira/browse/HDFS-10630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15495376#comment-15495376 ] 

Jason Kace commented on HDFS-10630:
-----------------------------------

Attaching first version of the HDFS Federation state store implementation.  This implementation was designed to mirror the style of data/record/api serialization used in Yarn-2915.  This is the base on top of which various state store data APIs will be developed.

This patch contains:

1) The basic FederationStateStore manager which maintains the connection to the data backend.  The manager exposes basic CRUD interfaces for data records.

3) A simple file-based data storage backend that is used for light testing.  ZK data store implementation will be in a separate patch.

3) A mock entity that is serialized in the data store via protobuf to demonstrate the data record object model.  This entity is only for demonstration and testing.  I will add a real example and the associated APIs in HDFS-10687.

4) A simple unit test that uses the FederationStateStore CRUD interfaces to insert, update and delete a mock data entity.


> Federation State Store
> ----------------------
>
>                 Key: HDFS-10630
>                 URL: https://issues.apache.org/jira/browse/HDFS-10630
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Inigo Goiri
>
> Interface to store the federation shared state across Routers.



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