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Operating Systems AIX HACMP switch over
# 1  
Old 11-23-2010
[Solved] HACMP switch over

Hi

I had an active passive cluster. Node A went down and all resource groups moved to Node B.
Now we brought up Node A. What is the procedure to bring everything back to Node A.

Code:
Node A [/] #lssrc -a | grep cl
 clcomdES         clcomdES         323782       active
 clstrmgrES       cluster          430318       active
 nimsh            nimclient                     inoperative
 gsclvmd                                        inoperative

Code:
Node B [/] #lssrc -a | grep cl
 clcomdES         clcomdES         430292       active
 clstrmgrES       cluster          360632       active
 gsclvmd                           381042       active
 clinfoES         cluster          303340       active
 nimsh            nimclient                     inoperative

Please assist. Thanks

Moderator's Comments:
Mod Comment Use code tags when posting code, data or logs etc. to preserve formatting and enhance readability, thanks. You got a guide via PM.
# 2  
Old 11-23-2010
Quote:
Originally Posted by samsungsamsung
[...]
I had an active passive cluster. Node A went down and all resource groups moved to Node B.
Now we brought up Node A. What is the procedure to bring everything back to Node A.
[...]
This can be done with CSPOC easily.
Code:
# smitty hacmp
    -> System Management (C-SPOC)
         -> HACMP Resource Group and Application Management
              -> Move a Resource Group to Another Node / Site

Select one RG at a time and move it to the other node.
This User Gave Thanks to shockneck For This Post:
# 3  
Old 11-23-2010
HACMP switchover

Hi
If I start the cluster now in node A using "smitty clstart", wont the resource groups come to node A from node B
# 4  
Old 11-23-2010
Quote:
Originally Posted by samsungsamsung
What is the procedure to bring everything back to Node A.
I don't want to appear rude or uninformative, but: clusters are a really sensible class of systems and most likely the applications running on it are mission critical - this is usually the reason one decides to (undergo the trouble to) use an HA-system in first line.

Are you sure - really, really sure - you should administrate such a system with such an obvious lack of expertise? Moving a resource group is quite a basic task to do. Don't you think it would be wiser to hire an expert to work on a perhaps quite sensible system while you get some education (not some answers here - i am talking classes and/or homework)?

There are some so-called "red books" at IBM Redbooks you might want to download and study (redbooks are freely downloadable PDFs) dealing with HACMP/PowerHA. Here is a (non-complete) list of redbooks you might find interesting:

Implementing High Availability Cluster Multi-Processing (HACMP) Cookbook, SG24-6769-00

HACMP 5.3, Dynamic LPAR, and Virtualization, REDP-4027-00

IBM eServer pSeries HACMP V5.x Certification Study Guide Update, SG24-6375-01

Having said this: Move the resource group using the SMIT menu (its the easiest way) by entering

Code:
smitty cl_resgrp_move.node_site

and follow the menu there, it is self-explanatory.

I hope this helps.

bakunin

PS: i see that shockneck already answered while i was typing - the SMIT menu he pointed you to is the same one i told you the fastpath for.
This User Gave Thanks to bakunin For This Post:
# 5  
Old 11-23-2010
If the Ressource Groups fails back automatically depends on your configuration. You can check the fallback policy in the smit menu
Quote:
Change/Show Resources and Attributes for a Resource Group
or e.g. with
Quote:
/usr/es/sbin/cluster/utilities/cldump
# 6  
Old 11-23-2010
HACMP switchback

Hi

The daemons gsclvmd and nimsh are still showing up as inoperative in node A
Code:
#lssrc -a | grep cl
 clcomdES         clcomdES         323782       active
 clstrmgrES       cluster          430318       active
 nimsh            nimclient                     inoperative
 gsclvmd                                        inoperative

So will the resource group movement work fine?

Moderator's Comments:
Mod Comment You already got a reminder and a guide to use code tags. Please do not ignore these.

Last edited by zaxxon; 11-23-2010 at 10:36 AM..
# 7  
Old 11-23-2010
You don't need nimsh.
Are you using concurrent vg's?
This User Gave Thanks to firefox111 For This Post:

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