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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "ZooKeeper/ServiceLatencyOverview" by PatrickHunt
Date Tue, 27 Oct 2009 06:13:56 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=9&rev2=10

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

  All systems had 16gig 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 had 7200RPM SATA drives.
+ 
+ All systems are interconnected with 1gig ethernet, approximate ping time is steady at 0.09ms
roundtrip.
  
  === Operating System ===
  
@@ -46, +48 @@

  The client was run as follows unless otherwise noted:
  
  {{{
- zk-latencies.py --servers \"host60:2181\" --root_znode=/`hostname` --znode_size=100 --znode_count=10000
--timeout=5000 --watch_multiple=5
+ zk-latencies.py --servers "host60:2181" --root_znode=/`hostname` --znode_size=100 --znode_count=10000
--timeout=5000 --watch_multiple=5
  }}}
  
  This means each client:
   * has a 5 second timeout
   * creates 10k znodes of size 100 bytes
   * sets 5 watches on each of the znodes it creates, for 50k znodes by each client
+ 
+ As a result, each client will send ~110,000 requests to the server during each test.
  
  == Results ==
  
@@ -121, +125 @@

  
  === 2 Core - 1 Client ===
  
- 110k operations against the server with elapsed time of 18 seconds
+ 110k operations against the server with elapsed time of 20 seconds
  
  {{{
  host40: Testing latencies on server host60:2181 using asynchronous calls
@@ -140, +144 @@

  
  === 2 Core - 10 Client ===
  
- 1.1 million operations against the server with elapsed time of 58 seconds
+ 1.1 million operations against the server with elapsed time of 53 seconds
  
  {{{
  host49: Testing latencies on server host60:2181 using asynchronous calls
@@ -159, +163 @@

  
  === 2 Core - 20 Client ===
  
- 2.2 million operations against the server with elapsed time of 150 seconds
+ 2.2 million operations against the server with elapsed time of 108 seconds
  
  {{{
  host46: Testing latencies on server host60:2181 using asynchronous calls
@@ -178, +182 @@

  
  === 4 Core - 1 Client ===
  
- 110k operations against the server with elapsed time of 18 seconds
+ 110k operations against the server with elapsed time of 20 seconds
  
  {{{
  host40: Testing latencies on server host60:2181 using asynchronous calls
@@ -197, +201 @@

  
  === 4 Core - 10 Client ===
  
- 1.1 million operations against the server with elapsed time of 58 seconds
+ 1.1 million operations against the server with elapsed time of 43 seconds
  
  {{{
  host43: Testing latencies on server host60:2181 using asynchronous calls
@@ -216, +220 @@

  
  === 4 Core - 20 Client ===
  
- 2.2 million operations against the server with elapsed time of 150 seconds
+ 2.2 million operations against the server with elapsed time of 95 seconds
  
  {{{
  host65: Testing latencies on server host60:2181 using asynchronous calls

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