topic SLVM and package multi_node on SG in Operating System - HP-UX

SLVM and package multi_node on SG

Juan de Los Palotes — Wed, 25 Nov 2009 23:06:11 GMT

Hi Guys

Rigth now I have a cluster with 3 nodes, and we want to create a rac enviroment. We are planning use SLVM to manage our disk, but I have a doubt.

If I active all VG's on all nodes, using SLVM, one node is marked Master/Server, and the rest of nodes are marked as a client.

My question is:

1.- What happen if the node that is marked Master/Server, is going off-line succendly, the rest of the nodes can be get access to read/write from the VG's if the Master/Server node is not available?

2.- Can be use a multi_node package to activate VG's on all nodes.

Thanks in advanced!!!

JDP

Re: SLVM and package multi_node on SG

Steven E. Protter — Thu, 26 Nov 2009 00:26:25 GMT

Shalom,

For Oracle RAC to work right active active, volume groups must be activated in shared mode.

A master/slave setup won't work. If you go with an Active/Passive RAC configuration, the problem is different.

SEP

Re: SLVM and package multi_node on SG

Stephen Doud — Thu, 26 Nov 2009 13:03:09 GMT

SGeRAC is designed to pass master/server role to another node if the current master fails.

Re: SLVM and package multi_node on SG

Emil Velez — Thu, 26 Nov 2009 23:55:32 GMT

1. IF the master is unavailable in the cluster it elects another master.

2. you need to make sure you activate the volume group in shared mode before you start the instance on that node.

CFS is a great option for Oracle RAC too and provides all of the features of filesystems oracle.

In my opinion CFS is quite simpler to setup and supported with Oracle 10GR2 and above.