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https://issues.apache.org/jira/browse/HDFS-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025897#comment-13025897
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Suresh Srinivas commented on HDFS-1052:
---------------------------------------
Some benchmark results:
h3. TestDFSIO read tests
*Without federation:*
{noformat}
----- TestDFSIO ----- : read
Date & time: Wed Apr 27 02:04:24 PDT 2011
Number of files: 1000
Total MBytes processed: 30000.0
Throughput mb/sec: 43.62329251162561
Average IO rate mb/sec: 44.619869232177734
IO rate std deviation: 5.060306158158443
Test exec time sec: 959.943
{noformat}
*With federation:*
{noformat}
----- TestDFSIO ----- : read
Date & time: Wed Apr 27 02:43:10 PDT 2011
Number of files: 1000
Total MBytes processed: 30000.0
Throughput mb/sec: 45.657513857055456
Average IO rate mb/sec: 46.72107696533203
IO rate std deviation: 5.455125923399539
Test exec time sec: 924.922
{noformat}
h3. TestDFSIO write tests
*Without federation:*
{noformat}
----- TestDFSIO ----- : write
Date & time: Wed Apr 27 01:47:50 PDT 2011
Number of files: 1000
Total MBytes processed: 30000.0
Throughput mb/sec: 35.940755259031015
Average IO rate mb/sec: 38.236236572265625
IO rate std deviation: 5.929484960036511
Test exec time sec: 1266.624
{noformat}
*With federation:*
{noformat}
----- TestDFSIO ----- : write
Date & time: Wed Apr 27 02:27:12 PDT 2011
Number of files: 1000
Total MBytes processed: 30000.0
Throughput mb/sec: 42.17884674597227
Average IO rate mb/sec: 43.11423873901367
IO rate std deviation: 5.357057259968647
Test exec time sec: 1135.298
{noformat}
> HDFS scalability with multiple namenodes
> ----------------------------------------
>
> Key: HDFS-1052
> URL: https://issues.apache.org/jira/browse/HDFS-1052
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: Block pool proposal.pdf, HDFS-1052.3.patch,
> HDFS-1052.4.patch, HDFS-1052.5.patch, HDFS-1052.patch, Mulitple
> Namespaces5.pdf, high-level-design.pdf
>
>
> HDFS currently uses a single namenode that limits scalability of the cluster.
> This jira proposes an architecture to scale the nameservice horizontally
> using multiple namenodes.
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