- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Agile Addressing in SG
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 04:31 AM
04-04-2011 04:31 AM
Does it matter if disks have different agile addresses from node to node within a cluster?
In the past (11.23) the CTD numbers never matched either from node to node, so I don't think this is a problem, but just wanted to be sure.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 04:50 AM
04-04-2011 04:50 AM
SolutionYes, this is normally something that worries people but is not_an_issue. As you talk in terms of two different kernels on two different nodes, the likelihood of the DSF being the same is not high and yes this is pretty much of one of the features in terms of an "asymmetric cluster". Not only can you have different persistent DSF on two different nodes, you can have the a legacy DSF on one node and a persistent DSF on the other. In turn which leads to the execution of ioscan -m dsf many times...
Anyways in a nutshell, incomplete vgimport execution will import with legacy DSF if not used with appropriate options and yes there is_no_issue regarding this. Talking about the manageablity aspect came the concept of a cDSF. Don't forget to assign points.
Regards
Ismail Azad
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 05:22 AM - last edited on 07-11-2011 02:59 PM by Kevin_Paul
04-04-2011 05:22 AM - last edited on 07-11-2011 02:59 PM by Kevin_Paul
Re: Agile Addressing in SG
Hey;
Just to reiterate: no, no issue. This was one of the central themes to another conversation we had here on ITRC regarding cluster wide device special files: http://h30499.www3.hp.com/t5/System-Administration/dev-cdisk-disk/m-p/4755089#M388582
Hope that helps.
Doug
------
Senior UNIX Admin
O'Leary Computers Inc
linkedin: http://www.linkedin.com/dkoleary
Resume: http://www.olearycomputers.com/resume.html
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 11:08 AM
04-04-2011 11:08 AM
Re: Agile Addressing in SG
You could see that the correct Symmetrix disk was at the agile address, and because they're LVM disks I knew it was right.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 07:54 PM
04-04-2011 07:54 PM
Re: Agile Addressing in SG
THe thing to make sure is the wwid. BUt when you import a disk using the VGID or when the VXVM disk group is activated it figures out the local device file for the disk.
In the olden days when I clustered using K boxes and T boxes(im dating myself) we could never have the same device files on different systems.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 08:39 PM
04-04-2011 08:39 PM
Re: Agile Addressing in SG
Most Serviceguard administrators would prefer a cluster that is symmetric (where the disk device files for shared volume groups are identical between nodes) as it is easier to administer. And while it is possible to alter device file names through the procedure below, this concept is quickly becoming a moot point with the introduction of SANâ s and other disk arrays into Serviceguard environments. With SANâ s and certain arrays, it is nearly impossible to create identical disk device file names between nodes.
In a SCSI disk environment, it is possible to alter instance numbers in order to create identical device file names for disks.
Rgds...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2011 11:44 PM
04-04-2011 11:44 PM
Re: Agile Addressing in SG
a little more on reorganizing the IO tree:
http://viktorbalogh.net/blog/hp-ux/hp-ux_sysadm/reorganizing-io-tree-general-steps
Unix operates with beer.