- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Re: eva + lvm striping
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
тАО09-07-2005 09:57 PM
тАО09-07-2005 09:57 PM
eva + lvm striping
eva with a few virtual disk and then lvm stripe them into a single vg.
will there be performance improvement? is it a best practice?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-07-2005 09:59 PM
тАО09-07-2005 09:59 PM
Re: eva + lvm striping
No, it will not give any performance benefit nor be any "best practice".
You can activate the full performance of the EVA, using one single LUN.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-07-2005 11:00 PM
тАО09-07-2005 11:00 PM
Re: eva + lvm striping
When presenting only one vdsik to a HP-UX System you have to change the kernel paramater:
scsi_max_depth - standard is 8
Some of our customers had very poor performance, aftre raising this paramter everything works fine.
This parameter must be set in VMware ESX environments too, when using only one LUN.
Markus
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-08-2005 01:48 AM
тАО09-08-2005 01:48 AM
Re: eva + lvm striping
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=lpg35039
And Leif: In order to achieve full performance of an EVA you need to allocate at least 2 LUNs, 1 on each controller!
Cheers
Peter
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-08-2005 10:18 AM
тАО09-08-2005 10:18 AM
Re: eva + lvm striping
As you might be aware , EVA does the striping of its own. So there would be double striping .If you enable LVM striping , there are overheads involved as well. From OS perception , there would be slight LVM striping overhead . From EVA perception, it is little more overhead to it as you are making him work more. Although EVA is powerful enough to handle the overhead, it is always good to allow him to work of its own.
To get maximum throuput from EVA you can have 1 disk group and Vdisks/LUNs equally distributed/balanced on the two controllers.
Although it is not mentioned in HP's best practices about LVM striping, I would say it is not required.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-09-2005 12:04 AM
тАО09-09-2005 12:04 AM
Re: eva + lvm striping
Mike
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-09-2005 12:05 AM
тАО09-09-2005 12:05 AM
Re: eva + lvm striping
If you have free resources, then test the different configurations, to see the real impact.
Mike