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From "Joep Rottinghuis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17018) Spooling BufferedMutator
Date Tue, 20 Dec 2016 04:49:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joep Rottinghuis updated HBASE-17018:
-------------------------------------
    Attachment: HBASE-17018.master.004.patch

Attaching patch 4 to incorporate feedback from Ted.
Added unit tests for size-based flushing as well as size-based put validation.
Added RB: https://reviews.apache.org/r/54882/
Still much work to do...

> Spooling BufferedMutator
> ------------------------
>
>                 Key: HBASE-17018
>                 URL: https://issues.apache.org/jira/browse/HBASE-17018
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Joep Rottinghuis
>         Attachments: HBASE-17018.master.001.patch, HBASE-17018.master.002.patch, HBASE-17018.master.003.patch,
HBASE-17018.master.004.patch, HBASE-17018SpoolingBufferedMutatorDesign-v1.pdf, YARN-4061 HBase
requirements for fault tolerant writer.pdf
>
>
> For Yarn Timeline Service v2 we use HBase as a backing store.
> A big concern we would like to address is what to do if HBase is (temporarily) down,
for example in case of an HBase upgrade.
> Most of the high volume writes will be mostly on a best-effort basis, but occasionally
we do a flush. Mainly during application lifecycle events, clients will call a flush on the
timeline service API. In order to handle the volume of writes we use a BufferedMutator. When
flush gets called on our API, we in turn call flush on the BufferedMutator.
> We would like our interface to HBase be able to spool the mutations to a filesystems
in case of HBase errors. If we use the Hadoop filesystem interface, this can then be HDFS,
gcs, s3, or any other distributed storage. The mutations can then later be re-played, for
example through a MapReduce job.
> https://reviews.apache.org/r/54882/



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