01-02-2013
The load balancer is going to be a choking point (bandwidth and CPU utilization-wise). If it's bandwidth you may consider increasing the number of links. You can try to increase links through interface bonding. If it's CPU utilization, you might consider multiple load balances (kind of like google.com does) so you can spread load amongst several physical machines. I'd recommend doing that latter anyways, for availability reasons.
Before anyone can give you specific advice though, you need to localize the performance issue. For example, if you run a jMeter test against the serving nodes directly is that faster? If it is, then the load balancer is the choke point. If not then you may check to see if the network links are being saturated with some sort of command-line bandwidth checking tool (I use bwm-ng). If that's not the issue then move onto CPU, memory, etc. Once you've done that you should be in a better position to do something about the performance problems.
It's also possible that it's an application-level latency. For example if a particular website is served by a particular DB cluster and that cluster is going slow it may slow down the end user's experience.
10 More Discussions You Might Find Interesting
1. High Performance Computing
Hi ! I have a simple setup of 2 PC (with linux Red-Hat) where the first PC is the primary machine and the second the backup. I use DRBD for data replication and Red-Hat cluster suite for HA (High Availability). I have tested both.
Now I NEED a COMMON IP ADDRESS (or Master/unique IP address) for... (0 Replies)
Discussion started by: Danny Gilbert
0 Replies
2. UNIX for Dummies Questions & Answers
Hi ! I have a simple setup of 2 PC (with linux Red-Hat) where the first PC is the primary machine and the second the backup. I use DRBD for data replication and Red-Hat cluster suite for HA (High Availability). I have tested both.
Now I NEED a COMMON IP ADDRESS (or Master/unique IP address) for... (3 Replies)
Discussion started by: Danny Gilbert
3 Replies
3. Emergency UNIX and Linux Support
hello Gurus,
My current set up is 3 to 1 Cluster (SUN Cluster 3.2) running oracle database. Task is to reboot the servers. My query is about the procedure to do the same.
My understanding is suspend the databases to avoid switchover. Then execute the command scshutdown to down the cluster... (4 Replies)
Discussion started by: EmbedUX
4 Replies
4. Red Hat
Hi all, i have 3 nodes cluster (Centos 5 cluster suit) with out quorum disk,
node vote = 1,
the value of a quorum = 2,
when 2 nodes going offline, cluster services are destoys.
How i can save the cluster and all services(move all services to one alive node)
with out quorum disk when other... (3 Replies)
Discussion started by: Flomaster
3 Replies
5. Solaris
I am new to setting up sun solaris 10 cluster, I have 2 sun sparc t3-1 servers (identical), going to use them as web servers (sun one java web server 7), looking for data replication and real time fail over. My question is do I need external storage to configure the cluster? or I can just use... (3 Replies)
Discussion started by: spitfire2011
3 Replies
6. Solaris
Hi
we have 2 solaris 10 servers in veritas cluster.
also we have oracle cluster on the database end.
now we have a requirement to reboot both the servers as it has been running for more than a year.
can any one tell what is the procedure to bring down the cluster services in both the nodes... (7 Replies)
Discussion started by: newtoaixos
7 Replies
7. AIX
Hi,
A customer I'm supporting once upon a time broke their 2 cluster node database servers so they could use the 2nd standby node for something else. Now sometime later they want to bring the 2nd node back into the cluster for resilance. Problem is there are now 3 VG's that have been set-up... (1 Reply)
Discussion started by: elcounto
1 Replies
8. UNIX for Advanced & Expert Users
Is there any way to create a arbitrary node for ocfs2 on a virtual machine (others are physical servers) so it won't go panic when one of physical server goes down?
This is for load balanced application servers.
Any setting example or tips?
Thanks. (0 Replies)
Discussion started by: malayo
0 Replies
9. Red Hat
Hi All;
I try to build a Redhat Cluster (CentOS 6) on vmware. But each node sees the other down like:
# clustat
Cluster Status for mycluster @ Wed Apr 8 11:01:38 2015
Member Status: Quorate
Member Name ID Status
------ ---- ... (0 Replies)
Discussion started by: Meacham12
0 Replies
10. Red Hat
Hi All;
I try to build a Redhat Cluster (CentOS 6) on vmware. But each node sees the other down like:
# clustat
Cluster Status for mycluster @ Wed Apr 8 11:01:38 2015
Member Status: Quorate
Member Name ID Status
------ ---- ... (1 Reply)
Discussion started by: Meacham12
1 Replies
LEARN ABOUT OPENSOLARIS
clinfo
clinfo(1M) System Administration Commands clinfo(1M)
NAME
clinfo - display cluster information
SYNOPSIS
clinfo [-nh]
DESCRIPTION
The clinfo command displays cluster configuration information about the node from which the command is executed.
Without arguments, clinfo returns an exit status of 0 if the node is configured and booted as part of a cluster. Otherwise, clinfo returns
an exit status of 1.
OPTIONS
The following options are supported:
-h Displays the highest node number allowed to be configured. This is different from the maximum number of nodes supported in a given
cluster. The current highest configured node number can change immediately after the command returns since new nodes can be dynami-
cally added to a running cluster.
For example, clinfo -h might return 64, meaning that the highest number you can use to identify a node is 64. See the Sun Cluster 3.0
System Administration Guide for a description of utilities you can use to determine the number of nodes in a cluster.
-n Prints the number of the node from which clinfo is executed.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
1 An error occurred.
This is usually because the node is not configured or booted as part of a cluster.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5)
SunOS 5.11 12 Mar 2002 clinfo(1M)