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LLT Checksums

By Sandeep Agarwal | October 26, 2009 11:10PM
Recently we got an escalation from the field on AIX in which we saw that gab paniced the node because it got a packet with a wrong sequence number. On further debugging we found that everything was correct except that 1 bit in the gab sequence number was flipped from 0 to 1 thus causing gab to panic the node since it suspected data corruption.   Read more
Tagged with: Cluster Server, Clustering and Replication
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Atlanta Group Nov 18, 2009 - VCS and FireDrill PPT Presentations
JoeH
“Hello everyone, We had a great meeting on Nov 18th with Mark Salmon presenting a technical review of Veritas Cluster Server (VCS) and the associated VCS testing tool called FireDrill.  These are two really great products from Symantec that are definitely leaders in their space. ...”
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Posted 1 hour 50 min ago by JoeH
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Veritas Cluster Server One 5.0
dshupp
“Veritas Cluster Server One 5.0 is released on November 2nd 2009   Product Overview   ...”
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Posted 1 week 3 days ago by dshupp
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LLT Checksums
Sandeep Agarwal
“Recently we got an escalation from the field on AIX in which we saw that gab paniced the node because it got a packet with a wrong sequence number. On further debugging we found that everything was correct except that 1 bit in the gab sequence number was flipped from 0 to 1 thus causing...”
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Posted 3 weeks 3 days ago by Sandeep Agarwal
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Managing Oracle 10g in Solaris Zones with VCS
jdangelo_symc
“This Presentation is an overview and customer example on how to leverage Storage Foundation HA/DR for Oracle when using Solaris Zones.  Architecture detail, cluster examples and best practices are highlighted throughout the document.  This was developed as a co-presentation for the...”
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Posted 3 weeks 4 days ago by jdangelo_symc
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July 2009 Issue on Amazon Kindle
Patrick E. Spencer
“Starting with the April 2009 issue, we began publishing each issue of CIO Digest to the Amazon Kindle. Readers want to consume content in a variety of different formats, and the increasingly popularity of the Amazon Kindle prompted us to begin making each issue...”
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Posted 5 weeks 5 days ago by Patrick E. Spencer
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5 weeks 1 day ago
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Banking on Resiliency In Trying Times
David Krauss
“With So Much at Stake, Financial Institutions Bank on Resiliency to Thrive in Trying Times Reputation damage – Everybody’s talking about data breaches. But what about resiliency? ...”
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Posted 7 weeks 2 days ago by David Krauss
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Answers to Common VCS One Questions
mobilegleed
“A few weeks back a large number of Product Managers, Technical Product Managers, and Sales Engineers (SEs) gathered for our annual SE Symposium in Las Vegas.  VCS One was definitely on everyone's mind, especially with the upcoming 5.0 release.  Here's a summary of the Q & A from the...”
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Posted 8 weeks 2 days ago by mobilegleed
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Collaborate2009 Presentation: Portable, Virtualized Oracle Environments on Solaris using SF HA/DRprivate
Samuel Brunacini
“This presentation was given at Collaborate2009 and covers how to create virtualized Oracle servers utilizing Solaris Zones and make them completely portable, even to another data center. ...”
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Posted 9 weeks 4 days ago by Samuel Brunacini
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Low Latency Transport Suggestions
Sandeep Agarwal
“If you want to reduce extra traffic on the LLT links one small thing to do would be to add the following line to /etc/llttab on all the nodes in your cluster (say 2 node cluster): exclude 2-31 ...”
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Posted 10 weeks 19 hours ago by Sandeep Agarwal
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Winners Chosen for Symantec Data Center Games!
nicole_kim
“Congratulations to our Symantec Data Center Game winners for the month of July! Winners were selected from a random drawing of names from the top 50 scores from both games for the month of July. First Place - Deepak Waghmare, of Miele Security won 1,000 Symantec Connect Reward points Second Place...”
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Posted 10 weeks 1 day ago by nicole_kim
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Details on our upcoming VMWorld SuperSession
Sheri Atwood
“Symantec Super Session at VMworld 2009: Wednesday, September 2 at 10:00 AM Of course I may be a little biased because I will be presenting, but there are a lot of reasons why you should make Symantec’s Super Session a priority during your VMworld 2009 experience ...”
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Posted 12 weeks 1 day ago by Sheri Atwood
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Volume replicator hangs the system
Abdallah Alsaleh
“Hi, I have Veritas Storage Foundation HA/DR with VVR option. I did all the installation, configuration, setup and replication when both main site servers and DR site server were located in one location with 100 Mb/s bandwidth. ...”
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Posted 12 weeks 1 day ago by Abdallah Alsaleh
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VCS CLI Quick Reference
Bhavin Thaker
“Attached is a VCS CLI Quick reference (2-page) document that I have found to be handy in the use of VCS. Also attached is a 1-page VCS Quick reference from Veritas Education. Veritas Education: http://www.symantec.com/business/training/product_... Bhavin Thaker. ...”
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Posted 14 weeks 2 days ago by Bhavin Thaker
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LLT over vlanned trunks on Solaris
Sandeep Agarwal
“It seems that some customers want to create a trunk out of two links and then create vlans over that trunk and then run LLT over those two vlans. This is how to do this on Solaris: Create a trunk (aggregation first) out of the two bge links: dladm create-aggr -d bge2 -d bge3 1 <--- to...”
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Posted 16 weeks 4 days ago by Sandeep Agarwal
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LLT on Solaris - common ce driver tunable
Sandeep Agarwal
“If you have LLT working over the ce driver on Solaris, one small change that you can make to help performance problems in your cluster would be the following: The /etc/system file on all hosts should have: set ce:ce_no_tx_lb=1 set ce:ce_taskq_disable=1 set ce:ce_reclaim_pending=1 A reboot is...”
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Posted 18 weeks 1 day ago by Sandeep Agarwal
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IDC: Symantec Increases Market Share in Worldwide Quarterly Storage Software Tracker
Jerry Gowen
“IDC released its quarterly Storage Software Report yesterday, showing the market has experienced its first year-over-year decline in more than five years. And while most companies experienced a decline in revenue, Symantec was the only company that actually broke the trend and demonstrated growth...”
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Posted 23 weeks 3 days ago by Jerry Gowen
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Getting Started on Symantec Connect!
Eileen
“Here are a few tips and tricks that might come in handy as you get started on Symantec Connect. ...”
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Posted 24 weeks 4 days ago by Eileen
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another few tips with vxvm/vcs
Eric Gao
“Here I put down some tips in the community, in case someone else suffers the same issue. 1. manually import agent/type ...”
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Posted 27 weeks 1 day ago by Eric Gao
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Understanding Veritas Cluster Server Limits and Prerequisites
E. Hennessey
“A very useful - yet often overlooked - feature of Veritas Cluster Server is Limits and Prerequisites. This feature is often used in conjunction with Service Group Workload Management (SGWM), but can also be implemented on its own. In this post, I'll describe what this feature does and how you can...”
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Posted 29 weeks 4 days ago by E. Hennessey
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January 2009 Now Available on Amazon Kindle
Patrick E. Spencer
“The Amazon Kindle is one of the hottest consumer devices on the market today. Indeed, the Amazon Kindle 1 sold out for the Christmas holiday season several months beforehand, and the Amazon Kindle 2--available since late February--is generating similar results. ...”
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Posted 31 weeks 2 days ago by Patrick E. Spencer
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