- Community Home
- >
- Storage
- >
- Midrange and Enterprise Storage
- >
- StoreVirtual Storage
- >
- Re: Windows MPIO DSM - How Many Sessions?
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
тАО02-09-2011 12:02 PM
тАО02-09-2011 12:02 PM
I've then created and assigned luns in the CMC.
In the MS iSCSI initiator I've followed the guide in the Windows Solution Pack, so:
Added the vip's and done a refresh
Connected each volume twice - once for each iSCSI NIC/IP
Changed MPIO from "vendor specific" to "Round Robin"
And I'm seeing that in the CMC if I look at each volume I don't see the same number of sessions for each one.
LUN1 shows 6 connections to node1 (3 from each NIC)
LUN2 shows 2 connections to node2 (1 from each NIC)
LUN3 shows 6 connections to node3 (3 from each NIC)
LUN4 shows 4 connections to node4 (2 from each NIC)
LUN5 shows 2 connections to node1 (1 from each NIC)
Does this seem/sound normal please?
Thanks in advance,
Paul
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО02-09-2011 06:56 PM
тАО02-09-2011 06:56 PM
SolutionDoes the eventlog from msiscsi that show any MPIO errors?
You might want to delete the target portals, reboot and enter them in again.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО02-10-2011 01:55 AM
тАО02-10-2011 01:55 AM
Re: Windows MPIO DSM - How Many Sessions?
Then I moved my server to the same site as some of my storage, rebooted it, and now I have DSM sessions showing up?!
See, we have two sites with P4000 nodes in them running in network raid 10, but the cluster uses a single subnet and is a stretch LAN, so in theory a server can connect to any node in any site, so I didn't assign the server to a site because when I do that it "prefers" the servers in that site, if that makes sense?
I'm logging it with HP as I think I may have found a quirk or "something" that isn't clearly documented, or it may just be co-incidence.
Paul
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО02-10-2011 05:43 AM
тАО02-10-2011 05:43 AM
Re: Windows MPIO DSM - How Many Sessions?
This is by Design.
Its called Site Aware feature.
Hence the Server on the Site connects only to the Storage Systems on the same Site.
Hence the performance is much better.
Server Aware Sites
HP StorageWorks SAN/iQ software version 9.0 sites can be defined to contain specific host servers which enhances the load balancing and path management capabilities of the SAN for all MPIO and load balancing modes. Some of these enhancements were available previous to 9.0 but required multiple subnets to be used in the multi-site SAN. All load balancing improvements can now be used in either single subnet, or multi-subnet clusters.
When servers and storage nodes are assigned to sites using the HP P4000 CMC:
HP P4000 DSM sessions are automatically connected to only the storage systems that are in the same site as the host sever. This reduces overall session count and improves performance by favoring IO connections to storage systems that are more local to the host.
All other (non HP P4000 DSM) sessions are automatically load balanced to storage systems in the same site if the volume is not already being accessed at another site.
--------------------------------------------------------------
How to assign points? Click the KUDOS! star!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО02-10-2011 05:47 AM
тАО02-10-2011 05:47 AM
Re: Windows MPIO DSM - How Many Sessions?
For everyone else, as Jitun says it is the site aware feature, *but* it appears that if you aren't organized and simply leave your servers in "Unassigned" it uses DSM and connects to nodes in all sites.
I tried being tidy and created a site called "Servers" and put a server in it - when you do this it doesn't appear to use DSM, only regular MPIO.
I've asked for clarification from L2 and a possible feature request as it seems a little contrary to benefit from being disorganized :)
Paul
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-20-2012 08:50 AM
тАО09-20-2012 08:50 AM
Re: Windows MPIO DSM - How Many Sessions?
Your link no longer resolves! Any idea of the name of the manual that you referenced?