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From "Phabricator (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5776) HTableMultiplexer
Date Thu, 12 Apr 2012 22:03:19 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HBASE-5776:
-------------------------------

    Attachment: D2775.1.patch

Liyin requested code review of "[jira][89-fb][HBASE-5776] HTableMultiplexer".
Reviewers: Kannan

  There is a known issue in HBase client that single slow/dead region server could slow down
the multiput operations across all the region servers. So the HBase client will be as slow
as the slowest region server in the cluster.

  To solve this problem, HTableMultiplexer will separate the multiput submitting threads with
the flush threads, which means the multiput operation will be a nonblocking operation.
  The submitting thread will shard all the puts into different queues based on its destination
region server and return immediately. The flush threads will flush these puts from each queue
to its destination region server.

  Currently the HTableMultiplexer only supports the put operation.

TEST PLAN
  Unit tests

REVISION DETAIL
  https://reviews.facebook.net/D2775

AFFECTED FILES
  src/main/java/org/apache/hadoop/hbase/HConstants.java
  src/main/java/org/apache/hadoop/hbase/client/HConnection.java
  src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java
  src/main/java/org/apache/hadoop/hbase/client/HTable.java
  src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java
  src/main/java/org/apache/hadoop/hbase/client/MultiPut.java
  src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
  src/test/java/org/apache/hadoop/hbase/client/TestHTableMultiplexer.java

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> HTableMultiplexer 
> ------------------
>
>                 Key: HBASE-5776
>                 URL: https://issues.apache.org/jira/browse/HBASE-5776
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>         Attachments: D2775.1.patch, D2775.1.patch
>
>
> There is a known issue in HBase client that single slow/dead region server could slow
down the multiput operations across all the region servers. So the HBase client will be as
slow as the slowest region server in the cluster. 
>  
> To solve this problem, HTableMultiplexer will separate the multiput submitting threads
with the flush threads, which means the multiput operation will be a nonblocking operation.

> The submitting thread will shard all the puts into different queues based on its destination
region server and return immediately. The flush threads will flush these puts from each queue
to its destination region server. 
> Currently the HTableMultiplexer only supports the put operation.

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