How to Install DRBD in Amazon linux 2
Amazon Linux 2 DRBD Installation Instructions: To Install DRBD on Amazon Linux 2 we need to install the EPEL Repository first. Install t...
Showing posts with label cluster. Show all posts
Showing posts with label cluster. Show all posts
How to Check Status of MariaDB Galera Cluster?
How to Check Status of MariaDB Galera Cluster? Form the MariaDB prompt you can check the status of write-set replication throughout th...
How to add a quorum disk in Solaris Cluster?
How to add a quorum disk in Solaris Cluster? 1. Run scsetup . 2. Choose Add a quorum disk. 3. Do you want to add any quorum disks (...
GAB Driver And VCS Seeding
The /etc/gabtab file will contain the number of nodes defined in the cluster. During an initial build, the cluster won't fully start ...
VCS ports
a gab driver b I/O fencing (designed to guarantee data integrity) d ODM (Oracle Disk Manager) f CFS (Cluster File S...
VCS reports a "Concurrency Violation", and tries to offline that process. What is this, and is it bad?
A Concurrency Violation is reported when the Agent of a resource reports that same resource or process is running on another node. The Ag...
I need to work with a resource inside a Service Group, but I don't want to cause the Group to fault. What do I need to do?
You should first make the resource non-critical. hares -modify {resource name} Critical value to 0 By making the resource non-critic...
I just added a DiskGroup to VCS, and VCS offlined everything. Why?
The diskgroup you added was probably already imported manually or through VMSA, and without the "-t" option. vxdg import {dis...
What is the difference between freezing the system and freezing a Group? Which is better for maintenance?
Freezing a system prevents VCS from onlining a Service Group onto that system. This is usually done when a machine in the cluster is uns...
Does VCS require "shared disks"?
No, VCS does not require that your nodes are connected to shared disks. However, most people like to have storage that can be deported an...
Can I run different versions of VCS in the same cluster?
No, absolutely not! Different versions of VCS, and even different patch levels of VCS, cannot run at the same time in the same cluster. ...
Do I need to create the same VxVM DiskGroup on both machines?
No, when you create a Volume Manager DiskGroup, just pick one machine to create the DiskGroup on. You do not create the same DiskGroup on...
Does VCS require license keys to run?
The latest versions of VCS require license keys to run. VCS 1.3 and before did not.
What does autodisable mean? Why did VCS autodisable my Service Group?
VCS does not allow failovers or online operation of a Service Group if it is autodisabled. VCS has to autodisable a Service Group when V...
Can different Resources have the same name if they are in different Service Groups?
No, two resources in the cluster cannot have the same name, even if they are in different Service Groups. Resource names must be unique i...
Can I use vi to edit main.cf?
You can edit " main.cf" only when VCS is shutdown. VCS does not read main.cf when it is already running. VCS only reads from ...
How do I add another Service Group to main.cf?
You can add a Service Group using the VCS GUI, using VCS commands, or editing the main.cf file.
Should I put everything in one Service Group, or should I have more than one Service Group?
Usually people try to separate different applications as much as possible. Service Groups serve as logical divisions for your application...
Does each Service Group have its own IP and DiskGroup?
Usually, Service Groups have their own IP and DiskGroup resources, but this is not technically required; it all depends on your applicati...
What's the difference between Agents and Resources?
Agents are VCS processes that control and monitor the Resources. Resources are all those objects in your Service Group, and they all req...
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