Information Centers / Site Reference / Sticky posts / VCS Configurations / VCS Fundamentals / VCS How To / VCS Maintenance / VCS Migrations / VCS Troubleshooting / VCS Upgrades / Veritas Cluster Services
by Ramdev · Published September 18, 2015 · Last modified September 19, 2019
VCS for Beginners Read – VCS for Beginners – Getting Started with VCS Read – VCS for Beginners– Cluster Membership & IO Fencing Read – VCS for Beginners – Understand Jeopardy Condition with real time scenerio Read – VCS for Beginners – Configuring Veritas Cluster...
Blog for Unix Admin / VCS Fundamentals / VCS Troubleshooting / Veritas Administration for unixadmin
by Ramdev · Published June 12, 2014
VCS uses the Group Membership Services/Atomic Broadcast (GAB) protocol for cluster membership and reliable cluster communications. GAB has two major functions. It handles the following tasks: Cluster membership Cluster communications To configure GAB Set up an /etc/gabtab configuration file on each...
Unix Experts / Unix Intermediate / VCS Fundamentals / VCS Troubleshooting / Veritas Cluster Services / Video Learning / Video Posts
by Ramdev · Published February 17, 2013 · Last modified July 22, 2016
This post is all about the purpose of I/O fencing and how i/o fencing works to avoid the split brain condition?. Normally, I do spend 4 to 6 hours to post a technical article with complete details, but for this one I have spent lot more...
VCS Fundamentals / VCS Maintenance / VCS Troubleshooting / Veritas Cluster Services
by Ramdev · Published January 1, 2012
About the VCS configuration files VCS configuration files include the following: main.cf The installer creates the VCS configuration file in the /etc/VRTSvcs/conf/config folder by default during the VCS configuration. The main.cf file contains the minimum information that defines the cluster and its nodes. types.cf The file...
Blog for Unix Admin / VCS Fundamentals / VCS Maintenance / VCS Troubleshooting / Veritas Administration for unixadmin / Veritas Cluster Services
by Ramdev · Published November 11, 2011 · Last modified July 23, 2016
VCS uses two components, LLT and GAB, to share data over private networks among systems. These components provide the performance and reliability that VCS requires. LLT (Low Latency Transport) provides fast, kernel-to-kernel communications, and monitors network connections. LLT configuration files are as follows: /etc/llthosts—lists all...
Blog for Unix Admin / VCS Fundamentals / VCS Maintenance / VCS Troubleshooting / Veritas Administration for unixadmin / Veritas Cluster Services
by Ramdev · Published October 27, 2011
Use the following command to display the current state of the Veritas Cluster Server(VCS) configuration database: # haclus -display | grep ReadOnly ReadOnly 1 A result code of 1 indicates the configuration database is in a closed(ReadOnly) state. A result code of 0 indicates the configuration...
Blog for Unix Admin / VCS Migrations / VCS Troubleshooting / VCS Upgrades / Veritas Administration for unixadmin / Veritas Cluster Services
by Ramdev · Published May 18, 2011 · Last modified August 5, 2016
VCS facing the following Issue : Service group not failing over when server rebooted. Error messages in /var/adm/messages file: Mar 18 15:26:48 p-vhs-ntt01b-d2 gab: [ID 316943 kern.notice] GAB INFO V-15-1-20036 Port a gen ef2e0f membership 01 Mar 18 15:26:48 p-vhs-ntt01b-d2 gab: [ID 608499 kern.notice] GAB INFO...
VCS Configurations / VCS Fundamentals / VCS Maintenance / VCS Migrations / VCS Troubleshooting / VCS Upgrades
by Ramdev · Published March 6, 2011 · Last modified August 6, 2016
The /etc/llttab file must specify the system’s ID number (or its node name), its cluster ID, and the network links that correspond to the system. In addition, the file can contain other directives. Refer also to the sample llttab file in /opt/VRTSllt. Run the dladm show-dev command...
VCS Migrations / VCS Troubleshooting / VCS Upgrades
by Ramdev · Published March 6, 2011 · Last modified August 5, 2016
To disable the agent on a system, you must first change the VCS service group to an OFFLINE state. You can stop the application completely, or switch the service group to another system. To disable the agent Determine if the service group is online. At...
VCS Maintenance / VCS Migrations / VCS Troubleshooting / VCS Upgrades
by Ramdev · Published March 6, 2011 · Last modified July 23, 2016
Below are the some sample configurations on how do we configure new service groups in two common scenarios i.e. while VCS online and while the VCS is stopped. It is good to know this information to perform various dynamic configuration to VCS cluster without disrupting the...
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