Storage & Clustering Community Blog

Easy IMF plugin to make a VCS agent IMF-enabled
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1) Stop the VCS cluster
   # hastop -all

Note: The steps here are meant for education purposes only and
hence shutdown VCS. You can perform these steps by keeping
VCS online as well. Refer to the VCS Admin guide and
Agent Developer's guide for further details.

2) Let's write a quick VCS agent that starts the script myimf.sh
 
   # mkdir /opt/VRTSvcs/bin/ezimf
   # cd /opt/VRTSvcs/bin/ezimf

   # vi myimf.sh   (enter the following text)
---------------------------------------------------------------------------
#!/bin/sh

while [ 1 ]
do
        sleep 60
        /usr/bin/logger -p kern.alert "hello world from myimf.sh"...

I was thinking about cluster node counts the other day, and wondering about their distribution. That is, what percentage of clusters are two node, three node, four node, and so on. There are a couple of different kinds of clusters out there -- in this context, these are tightly coupled clusters for availability (failover) or concurrent transaction clusters (like Oracle RAC, Sybase ASE Cluster Edition, or Cluster File Systems) -- not large computational clusters (like BlueGene). I ran the numbers from SORT uploads, and got the distribution. Then I wondered whether Linux might have more nodes than AIX/HP-UX/Solaris. Linux fans might say "Naturally, because it's cheaper" while detractors might think "Of course, because SMP scalability is still better on <my platform/>." One or both groups appear correct:

You can see the white has fewer...

New Service Pack Release (SP2) for Symantec ApplicationHA 5.1 SP2 for Linux and Windows Platforms. 

Go to the SORT website for the product release notes and more information about the release.

 https://sort.symantec.com/public/documents/appha/5.1sp2/linux/productguides/pdf/appha_release_notes_51sp2_lin.pdf

 https://sort.symantec.com/public/documents/appha/5.1sp2/windows/productguides/pdf/appha_release_notes_51sp2_win.pdf

Symantec Operations Readiness Tools (SORT)

SORT Portal: https://sort.symantec.com

 SORT Patches: ...

Are you looking for a robust solution for your application availability issues in virtualized environments? If yes, stop by our booth at VMworld and learn more about our ApplicationHA product. We are even giving away a FREE license when you sign up at our booth. Get your free license at VMworld, deploy ApplicationHA in your VMware virtual machine and make your life in the data center easy!