Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to troubleshoot a 1000 nodes Apache cluster?
Operating Systems Linux Red Hat How to troubleshoot a 1000 nodes Apache cluster? Post 302750895 by thmnetwork on Wednesday 2nd of January 2013 06:36:54 PM
Old 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

Bonding, IP alias, Virtual IP, 2 nodes cluster

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

IP Alias, Bonding or Virtual IP, 2 nodes Cluster, which one to use ?

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

Rebooting 3 to 1 Cluster nodes.

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

Centos/rhel 5 cluster 3 nodes with out Quorum

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

Need advise on setting up solaris 10 2 nodes cluster

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

What is the procedure to reboot cluster nodes

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

Re-cluster 2 HACMP 5.2 nodes

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

Arbitrator for 2 nodes ocfs cluster

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

RedHat Cluster: Nodes won't see each other

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

RedHat Cluster: Nodes won't see each other

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 HPUX

cmrunnode

cmrunnode(1m)															     cmrunnode(1m)

NAME

       cmrunnode - run a node in a high availability cluster

SYNOPSIS

       cmrunnode [-v] [node_name...]  [-t | -w none]

DESCRIPTION

       cmrunnode  causes  a node to start its cluster daemon to join the existing cluster.  This command verifies the network configuration before
       causing the node to start its cluster daemon.

       To start a cluster on one of its nodes, a user must either be superuser(UID=0), or have an access policy of FULL_ADMIN allowed in the clus-
       ter configuration file. See access policy in cmquerycl(1m).

       Starting  a node will not cause any active packages to be moved to the new node.  However, if a package is DOWN, has its switching enabled,
       and is able to run on the new node, that package will automatically run there.

       If node_name is not specified, the cluster daemon will be started on the local node and will join the existing cluster.

   Options
       cmrunnode supports the following options:

	      -v   Verbose output will be displayed.

	      -t   Test only. Provide an assessment of the package placement without affecting the current state of the nodes or packages. The	-w
		   option is not required with the -t option as -t does not validate network connectivity, but assumes that all the nodes can meet
		   any external dependencies such as EMS resources, package subnets, and storage.

	      node_name...
		   Start the cluster daemon on the specified node(s).

	      -w none
		   By default network probing is performed to check that the network connectivity is the same as when the cluster was  configured.
		   Any	anomalies are reported before the cluster daemons are started. The -w none option disables this probing. The option should
		   only be used if this network configuration is known to be correct from a recent check.

RETURN VALUE

       cmrunnode returns the following value:

	       0   Successful completion.
	       1   Command failed.

EXAMPLES

       Run the cluster daemon on the current node:

	      cmrunnode

       Run the cluster daemons on node1 and node2:

	      cmrunnode node1 node2

AUTHOR

       cmrunnode was developed by HP.

SEE ALSO

       cmquerycl(1m), cmhaltcl(1m), cmhaltnode(1m), cmruncl(1m), cmviewcl(1m), cmeval(1m).

						      Requires Optional Serviceguard Software					     cmrunnode(1m)
All times are GMT -4. The time now is 02:47 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy