VCS : Starting LLT , GAB and VCS manually

 

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 the nodes in the cluster
/etc/llttab—describes the local system’s private network links to the other nodes in the cluster
GAB (Group Membership and Atomic Broadcast) provides the global message order that is required to maintain a synchronized state among the nodes. It monitors disk communications such as the VCS heartbeat utility. The /etc/gabtab file is the GAB configuration file.

LLT and GAB initialization configuration files include:

/etc/default/llt
/etc/default/gab

Starting LLT, GAB, and VCS manually

To start LLT

On each node, type:

For Solaris 9:
# /etc/rc2.d/S70llt start
For Solaris 10:
# svcadm enable system/llt
If LLT is configured correctly on each node, the console output resembles:

Sep 1 19:12:57 galaxy kernel: LLT INFO V-14-1-10009
LLT 5.1.00.00 Protocol available

To start GAB

On each node, type:

Solaris 9:

# /etc/rc2.d/S92gab start

Solaris 10:

# svcadm enable system/gab

If GAB is configured correctly on each node, the console output resembles:

Sep 1 19:13:35 galaxy kernel: GAB INFO V-15-1-20021
GAB 5.1.00.00 available

To start VCS

On each node, type:

Solaris 9:
# /etc/rc3.d/S99vcs start
Solaris 10:
# svcadm enable system/vcs
If VCS is configured correctly on each node, the console output resembles:

Apr 5 14:52:02 galaxy gab: GAB:20036: Port h gen 3972a201
membership 01

Ramdev

Ramdev

I have started unixadminschool.com ( aka gurkulindia.com) in 2009 as my own personal reference blog, and later sometime i have realized that my leanings might be helpful for other unixadmins if I manage my knowledge-base in more user friendly format. And the result is today's' unixadminschool.com. You can connect me at - https://www.linkedin.com/in/unixadminschool/

2 Responses

  1. teesamlovesu says:

    Good one thank you :)

  1. September 18, 2015

    […] Read – VCS for Beginners – Starting LLT , GAB and VCS manually […]

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