Thanks for any help
These are two identical machines
Rh9
Apache2
Tomcat 5.0.24 with hotfix
Connected by gigaBit ethernet nics and switches.
Box 1 is using mod_jk
Box 2 is using mod_jk2
Box 1 has the real docroot
Box 2 has box1 docroot mounted nfs
(from previous message)
Box 1
INFO: Average cluster serialize/send time=120 ms for 300 requests (36046ms).
Box 2
INFO: Average cluster serialize/send time=8 ms for 300 requests (2401ms).
As an FYI these are real servers in an LVS env.
============================================================================
========
Both Boxes have same Cluster entries (different tcpListenAddress)
<Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true">
<Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/>
<Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="192.168.0.203"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/>
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"/>
<Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.jpg;.*\.htm;.*\.html;.*\.txt;.*\.pdf;"/>
</Cluster>
============================================================================
========
-----Original Message-----
From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED]
Sent: Friday, May 21, 2004 12:46 PM
To: Tomcat Users List
Subject: RE: Quiestion about Average cluster serialize/send
>Nr of bytes sent=369314 over 400 ==923 bytes/request
average number of bytes sent over in each replication request
>INFO: Average cluster serialize/send time=91 ms for 400 requests
>(36640ms)
the average time it takes to perform a replication request. IE, this is the
overhead you have per request when using clustering.
91ms, this time includes:
1. Serialize the request
2. Send the request over to the other server 3. Deserialize and recreate the
request (including invoke any listeners on the session) on the other server
4. Send a ACK message back to the original server 5. Receive the ACK message
Usually what takes time is the deserialization of the request.
Send us info on the two machines and the two configurations
Filip
-----Original Message-----
From: Randy [mailto:[EMAIL PROTECTED]
Sent: Friday, May 21, 2004 10:10 AM
To: 'Tomcat Users List'
Subject: Quiestion about Average cluster serialize/send
Hello
I got clustering up last night.
In the log file I am seeing some thing that I was wondering if someone could
help explain.
What concerns me is the difference in Average cluster
Is this the time it takes to serialize and send over the session info?
I am trying to understand where the problem is?
Thanks
========================
Box 1 log file snippet
========================
May 21, 2004 1:17:19 AM
org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=245486 over 200 ==1227 bytes/request May 21, 2004
1:19:24 AM org.apache.catalina.cluster.tcp.ReplicationValve
addClusterSendTime
INFO: Average cluster serialize/send time=120 ms for 300 requests (36046ms).
May 21, 2004 1:36:31 AM
org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=302688 over 300 ==1008 bytes/request May 21, 2004
1:50:09 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=369314 over 400 ==923 bytes/request May 21, 2004
2:13:33 AM org.apache.catalina.cluster.tcp.ReplicationValve
addClusterSendTime
INFO: Average cluster serialize/send time=91 ms for 400 requests (36640ms).
========================
Box 2 log file snippet
========================
May 21, 2004 1:39:17 AM org.apache.catalina.cluster.tcp.ReplicationValve
addClusterSendTime
INFO: Average cluster serialize/send time=9 ms for 100 requests (947ms).
May 21, 2004 1:54:41 AM
org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=158650 over 200 ==793 bytes/request May 21, 2004
2:30:03 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=216767 over 300 ==722 bytes/request May 21, 2004
3:28:29 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=283745 over 400 ==709 bytes/request May 21, 2004
4:16:34 AM org.apache.catalina.cluster.tcp.ReplicationValve
addClusterSendTime
INFO: Average cluster serialize/send time=9 ms for 200 requests (1846ms).
May 21, 2004 4:31:52 AM
org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=354565 over 500 ==709 bytes/request May 21, 2004
5:13:15 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=436113 over 600 ==726 bytes/request May 21, 2004
5:40:14 AM org.apache.catalina.cluster.tcp.ReplicationValve
addClusterSendTime
INFO: Average cluster serialize/send time=8 ms for 300 requests (2401ms).
May 21, 2004 5:42:29 AM
org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=511204 over 700 ==730 bytes/request May 21, 2004
6:04:17 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=587590 over 800 ==734 bytes/request May 21, 2004
6:30:18 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter addStats
INFO: Nr of bytes sent=657453 over 900 ==730 bytes/request
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