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Showing posts tagged with Cluster Server
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Raissa_T | 30 May 2012 | 0 comments

VMworld 2012 is around the corner - August 26-30th, 2012 (US) && October 9-11th (EMEA).  What do you want to see, hear, & learn at #VMworld 2012? Call for Papers Voting is open! Vote for your favourite topics. bit.ly/JnkmdG

Sharad Srivastava | 15 May 2012 | 2 comments

This blog describes the procedure to configure Hadoop Namenode for high availability under Veritas Cluster Server environment using the Agent Builder tool.

Installing and Configuring Hadoop Namenode for High Availability
Below are the tasks that needs to be performed for installing the Hadoop Namenode for clustering purposes:

  • Allocating shared disk resources : Symantec recommends installing Namenode metadata on a separate and dedicated shared disk resource.
  • Creating disk group, volume, and file system : Create a disk group, volume, and file system on a shared disk resource that is allocated for Namenode metadata.
  • Obtaining dedicated virtual IP address and DNS name : Obtain unique virtual addresses and DNS names for Namenode instance. This address and name is required to support the Namenode IP network configuration. Namenode uses this...
bpascua | 07 May 2012 | 0 comments

 

There is a strong Trend in IT towards converged infrastructures. This is really the proliferation of a number of hardware vendors.

Putting their solutions together in a rack and selling it as a complete solution of Storage, Servers and Networks. Converged Infrastructure is also closely associated with Cloud computing and subsequently has a neat segway into many organisations since cloud is very much in the top trends we see. The ability to easily deploy cloud like applications all in one box will certainly tick many of the C level execs check boxes. The problem with the one size fits all approach is that actually – one size doesn’t fit all. Taking Cloud as an example you may buy the infrastructure in one hunk but then what about the tools to manage it with? How about chargeback or showback, What about DR and what about when you want to move off the tin or no longer use that company as a strategic supplier. Most customers I talk to have the resources...

Eric.Hennessey | 03 May 2012 | 1 comment

A funny thing happened the other day when I went to one of my favorite sites to look up a word...I saw the above message, but looking at the redirect URL, it says "failover-namechangedtoprotecttheinnocent.com". Now, far be it from me to be correcting the vocabulary of a site whose stock in trade is word definitions, but in the high availability biz, that is NOT what we mean by "failover". A failover is when you have a service under HA cluster control, and in the event of a failure, that service is relocated to another server in the cluster. In its entirety.

Clearly there was some attempt made at protecting the service, otherwise my browser would have just thrown an error saying the site wasn't available. But it's just as clear that protection wasn't extended to the entire business service. We introduced Virtual Business Services to Veritas Cluster...

Shrikant Ghare | 25 Apr 2012 | 1 comment

A big Thank You to all for taking time to attend the Customer Forum event.

In the "Best practices in DR using VCS & VVR" session, we discussed the following:

  1. How VCS can be configured to achieve an effective and efficient DR solution.
  2. What are the best practices being followed in DR configurations.
  3. How VVR can be effectively configured in DR configurations.
  4. How VVR can help prevent data loss using Bunker configurations.
  5. What are the recommendations from Symantec with respect to DR configurations.

All this is summed up in the presentation attached to this blog post.

Please feel free to comment and ask questions if anything is unclear or you need more information.

 

Thanks again for making the event a great success!

Shrikant Ghare

Eric.Hennessey | 18 Apr 2012 | 0 comments

I've been blogging over the past couple of weeks under the theme "Everything you think you know about clustering is wrong". It's sort of a tongue-in-cheek theme, but the misconceptions I was trying to dispel are real and held by enough people that I felt they were worth addressing. But now I want to shift gears a little bit.

In my last post, I mentioned how a lot of people can't seem to break out of the late-1990s mindset of 2-node active/passive failover HA:

While large clusters meant we no longer needed two nodes for every critical application, many people's mindsets were still stuck in 1997 and they continued to view HA clustering in a 2-node, active/passive context.

To be sure, that's definitely not the case with all of our customers, especially...

Bhavin Thaker | 16 Apr 2012 | 3 comments

A big Hi to the Attendees of the SAMG Customer Forum in March 2012!

Thank you for attending my session on "Intelligent Monitoring Framework (IMF) – Smarter Availability" and rating it to be the BEST amongst all the Engineering sessions. I thoroughly enjoyed presenting this topic to you and it seems from the various feedback comments that you enjoyed my session too.

Attached is a PDF copy of my presentation for your perusal and given below is the link to the Easy IMF Plugin to make a VCS customer agent IMF enabled, that I described during the talk:

            https://www-secure.symantec.com/connect/blogs/easy-imf-plugin-make-vcs-agent-imf-enabled

I hope this session helped you understand both the black-box workings of the...

anishv | 16 Apr 2012 | 0 comments

Thank you all for attending the session on "Maximizing Availability in Virtualized Environments" during the SAMG Customer Forum in March 2012. I hope you would have found it useful.

We discuseed the following content during the session.

"Implementation architectures of VCS and ApplicationHA for virtualized environments. We reviewed common use cases and discussed how others are achieving maximum application availability in their virtualization implementations. This session provided information for VMWARE, Solaris Zones/LDOMs, AIX LPARs/WPARs and Linux KVM environments"

Again, thank you for your participation and hope to see you soon!

Regards,

Anish Vaidya

Eric.Hennessey | 13 Apr 2012 | 4 comments

 

A couple days ago, I blogged about the related myths of complexity and unreliability regarding high availability (HA) clustering. Today I want to spend a little time on the myth that clustering is expensive.
 
Early high availability clustering was as simple as it was primitive. Shared  storage was generally limited to two nodes via dual-attached SCSI disks and  communication between nodes typically consisted of each node just pinging the other periodically to check its state. If the standby node decided the active node was dead, it would respond to that failure by firing local copies of the  failed node's startup scripts to restart applications that had been running there.
 
But SAN and NAS technologies which allowed many more nodes to share...
Eric.Hennessey | 10 Apr 2012 | 1 comment

 

In my last post I mentioned a few common misconceptions about HA clustering that I'd be debunking; namely that it's unreliable, complex, and expensive. There are others that we'll get to in later posts, but for this one I want to tackle the myths of unreliability and complexity, since they kind of go hand-in-hand.
 
The vast majority of our customers using Veritas Cluster Server (VCS) for high availability have been using it for quite some time and are completely happy with it. But we do hear from time to time from customers who say they've used HA clustering in the past - either VCS or Brand X - and stopped using it because it "broke". Frankly, this reaction baffles me. As an IT guy who's been in the business for - well, let's just say a long time, OK? - I learned early on that if something...