- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Any way to tune pvlinks failover times?
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
тАО07-29-2004 03:38 AM
тАО07-29-2004 03:38 AM
Thanks....Geoff
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 03:43 AM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 03:52 AM
тАО07-29-2004 03:52 AM
Re: Any way to tune pvlinks failover times?
Set the IO_timeout value for a physical volume to zero (0) to use the
driver default:
pvchange -t 0 /dev/dsk/c2t0d2
-t IO_timeout Set IO_timeout for the physical volume to the
number of seconds indicated. An IO_timeout
value of zero (0) causes the system to use
the default value supplied by the device
driver associated with the physical device.
IO_timeout is used by the device driver to
determine how long to wait for disk
transactions to complete before concluding
that an IO request can not be completed (and
the device is offline or unavailable).
Thanks...Geoff
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 03:54 AM
тАО07-29-2004 03:54 AM
Re: Any way to tune pvlinks failover times?
IE - If I set it to 1 second - will there be any issues?
Thanks...Geoff
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 03:58 AM
тАО07-29-2004 03:58 AM
Re: Any way to tune pvlinks failover times?
Setting it to 1, would cause some problems like I/O timeout, SCSI resets. For example, If a write request could not be completed in 1 sec, it would result in I/O timeout. 1 sec would be too low. Go for the defaults.
With internal disks, I set it to default or 120 secs. For SAN disks, I set it to 120-180 secs.
Anil
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 04:01 AM
тАО07-29-2004 04:01 AM
Re: Any way to tune pvlinks failover times?
This is OK as long as all of your primary paths have nt failed over to the secondary :-)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 04:01 AM
тАО07-29-2004 04:01 AM
Re: Any way to tune pvlinks failover times?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 04:05 AM
тАО07-29-2004 04:05 AM
Re: Any way to tune pvlinks failover times?
But here's what happens.
If a time out occurs (30 secs), LVM sends a test IO, then waits another 30 secs, then it fails over - and waits a further 15 seconds before allowing access to alternate link - total time: 75 seconds
On a time sensitive system that does transaction processing - it is way too long.
Rgds...Geoff
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 04:08 AM
тАО07-29-2004 04:08 AM
Re: Any way to tune pvlinks failover times?
Rgds...Geoff
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-29-2004 11:19 PM
тАО07-29-2004 11:19 PM
Re: Any way to tune pvlinks failover times?
your observations are correct. See also http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=430929. Default timout is indeed 30 secs.
Best regards...
Dietmar.