- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Controlling primary/alternate paths under 11.31?
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
Discussions
Discussions
Forums
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
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
тАО03-07-2011 09:41 AM
тАО03-07-2011 09:41 AM
The problem I'm finding is that under 11.31, it is balancing the I/O load across all 4 paths (2 primary and 2 alternate). Due to the layout of the cables, we don't want to use the alternate path unless a switch is out for some reason. Can this be controlled? And if so, how?
BTW - all my VG's are set up with agile naming.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:16 AM
тАО03-07-2011 10:16 AM
SolutionHowever, the server will do round_robin per default:
# scsimgr get_attr -N /escsi/esdisk -a path_fail_secs -a load_bal_policy
You can change by using scsimgr (see manual or man page).
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:29 AM
тАО03-07-2011 10:29 AM
Re: Controlling primary/alternate paths under 11.31?
scsimgr lets you control the policy.
Policy impact:
round robin is easy on the system. The kernel does not need to do work to make that happen.
http://bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=120&prodSeriesId=417289&prodTypeId=18964&objectID=c01685302
Least load requires more kernel work but has been known to provide substantial performance impact.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:37 AM
тАО03-07-2011 10:37 AM
Re: Controlling primary/alternate paths under 11.31?
What I want/need to do is turn this off or set it purely as an alternate so ALL I/O goes only down the primary path. Unless of course there's an issue with the switch, when if that is the case, it needs to down the alternate path.
Make sense?
Thanks. I'll look at scsimgr.
-G
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:40 AM
тАО03-07-2011 10:40 AM
Re: Controlling primary/alternate paths under 11.31?
Thanks for the link. That is most helpful!
Points given.
I'll look at the links and suggestions. I knew there was a solution somehow!
-G
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:42 AM
тАО03-07-2011 10:42 AM
Re: Controlling primary/alternate paths under 11.31?
In this case the server should be aware of this and adjust automatically.
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-07-2011 10:45 AM
тАО03-07-2011 10:45 AM
Re: Controlling primary/alternate paths under 11.31?
# scsimgr get_info -D /dev/rdisk/disk__
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!