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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "ZooKeeper/ServiceLatencyOverview" by PatrickHunt
Date Tue, 08 Dec 2009 17:49:33 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "ZooKeeper/ServiceLatencyOverview" page has been changed by PatrickHunt.
http://wiki.apache.org/hadoop/ZooKeeper/ServiceLatencyOverview?action=diff&rev1=28&rev2=29

--------------------------------------------------

  All systems were dual quad core Intel(R) Xeon(R) CPUs running at 2.50GHz. Eight cores were
available however as noted below Linux's processor affinity feature was used to limit CPU
availability to the JVM. In the tests below I use 1, 2, or 4 cores from the first CPU (taskset
0x01 or 0x03 or 0x0f respectively).
  
  All systems had 16gig ECC memory available, however unless specifically noted the JVM's
-Xmx option was used to limit the size of the JVM heap to 512m.
- 
- All systems are interconnected with 1gig ethernet, approximate ping time is steady at 0.09ms
roundtrip.
-  * scp host60:/tmp/test /tmp/test
-   * test 100%  513MB  64.1MB/s   00:08  
  
  All systems had 7200RPM SATA drives
   * hdparm -tT reported:
@@ -30, +26 @@

    * user	0m1.284s
    * sys	0m0.214s
  
+ All systems are interconnected with 1gig ethernet, approximate ping time is steady at 0.09ms
roundtrip.
+  * scp host60:/tmp/test /tmp/test
+   * test 100%  513MB  64.1MB/s   00:08  
+ 
  === Operating System ===
  
  Linux version 2.6.18-53.1.13.el5 compiled using gcc version 4.1.2 20070626 (Red Hat 4.1.2-14))

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