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https://issues.apache.org/jira/browse/HBASE-5487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeffrey Zhong updated HBASE-5487:
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Attachment: Is the FATE of Assignment Manager FATE.pdf
There are already two good write ups on the topic. Here is yet the another one.
The motivations I post this small draft are that I think we need a systematic
model for things like table operations, region assignment and others like in
future so that we can design them in a unified way in order for people easy to
follow, easy to add test capabilities and easy to reason about the result.
I think FATE provides us those capabilities. We can view FATE as a
design/system model rather than an cold Accumulo implementation(in the sense we
can change the implementation to fit HBase cases).
Under this model, we can simplify region assignment and force feature
implementer to code in such a way that a partial failed operation can be
resumed/retied and leave executions to the framework.
The draft is only two pages long(if you know FATE it should only be one page)
and hope we don't drop FATE as an design option too quickly.
> Generic framework for Master-coordinated tasks
> ----------------------------------------------
>
> Key: HBASE-5487
> URL: https://issues.apache.org/jira/browse/HBASE-5487
> Project: HBase
> Issue Type: New Feature
> Components: master, regionserver, Zookeeper
> Affects Versions: 0.94.0
> Reporter: Mubarak Seyed
> Assignee: Sergey Shelukhin
> Priority: Critical
> Attachments: Entity management in Master - part 1.pdf,
> hbckMasterV2-long.pdf, Is the FATE of Assignment Manager FATE.pdf, Region
> management in Master5.docx, Region management in Master.pdf
>
>
> Need a framework to execute master-coordinated tasks in a fault-tolerant
> manner.
> Master-coordinated tasks such as online-scheme change and delete-range
> (deleting region(s) based on start/end key) can make use of this framework.
> The advantages of framework are
> 1. Eliminate repeated code in Master, ZooKeeper tracker and Region-server for
> master-coordinated tasks
> 2. Ability to abstract the common functions across Master -> ZK and RS -> ZK
> 3. Easy to plugin new master-coordinated tasks without adding code to core
> components
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