[Pacemaker] Assessment of the performance of a Pacemaker/Corosync active/active cluster

[fpetretti at secure-edge.com]

> On Fri, Apr 16, 2010 at 3:05 PM, Francesco Petretti
> <fpetretti at secure-edge.com> wrote:
>> We have a couple of VMWare virtual machines, both running the same
>> Operating
>> System (RHEL 5.4);
>> these guest systems run on different virtualization hosts.
>>
>> Both nodes run an Apache web server, serving the pages: "I am node 1"
>> and "I
>> am node 2".
>>
>> We have noticed that if a client accesses the floating IP, we get a
>> transactions per second (TPS) number which is approximately 20% of the
>> number that we get contacting real IPs.
>>
>> The configuration of these two nodes was done as outlined in:
>> http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>
> Which step are you up to?
> Has the IP been cloned?
>
Well I think I have cloned it:

[root at pes-app-sviluppo-05 ~]# crm
crm(live)# configure show
INFO: building help index
node pes-app-sviluppo-04
node pes-app-sviluppo-05
primitive ClusterIP ocf:heartbeat:IPaddr2 \
	params ip="192.168.41.238" cidr_netmask="32"
clusterip_hash="sourceip-sourceport" \
	op monitor interval="30s"
primitive WebSite ocf:heartbeat:apache \
	params configfile="/etc/httpd/conf/httpd.conf" \
	op monitor interval="1min"
clone WebIP ClusterIP \
	meta globally-unique="true" clone-max="2" clone-node-max="1"
clone WebSiteClone WebSite
colocation website-with-ip inf: WebSiteClone WebIP
order apache-after-ip inf: WebIP WebSiteClone
property $id="cib-bootstrap-options" \
	dc-version="1.0.8-9881a7350d6182bae9e8e557cf20a3cc5dac3ee7" \
	cluster-infrastructure="openais" \
	expected-quorum-votes="2" \
	stonith-enabled="false" \
	no-quorum-policy="ignore"
crm(live)#


============
Last updated: Mon Apr 19 13:33:46 2010
Stack: openais
Current DC: pes-app-sviluppo-04	- partition with quorum
Version: 1.0.8-9881a7350d6182bae9e8e557cf20a3cc5dac3ee7
2 Nodes configured, 2 expected votes
2 Resources configured.
============

Online: [ pes-app-sviluppo-04 pes-app-sviluppo-05 ]

 Clone Set: WebIP (unique)
     ClusterIP:0        (ocf::heartbeat:IPaddr2):	Started pes-app-sviluppo-04
     ClusterIP:1        (ocf::heartbeat:IPaddr2):	Started pes-app-sviluppo-05
 Clone Set: WebSiteClone
     Started: [ pes-app-sviluppo-04 pes-app-sviluppo-05 ]



>> Which parameters should we modify to improve the performance? (if the
>> performance _can _be improved...).
>> Can performance be improved ?
>>
>> --
>> /******
>> FP a.k.a. bip
>> *****/
>>
>>
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>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>>
>