- Community Home
- >
- Storage
- >
- Midrange and Enterprise Storage
- >
- HPE EVA Storage
- >
- Re: EVA 6110 with FC and FATA groups - Slow!!
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
тАО07-14-2010 02:19 PM
тАО07-14-2010 02:19 PM
EVA 6110 with FC and FATA groups - Slow!!
Our client has an EVA 6110 with FC and FATA disks.
Windows 2003 64 R2 and Windows 2008 R2
OS's are connected to it via Qlogic QMH2462 4Gb FC HBA's.
These are blade servers.
Now, the problem is the speed of the EVA.
Load and capacity have recently increased significantly, we are using nearly all of the 35TB worth of disks and there are nearly 1000 concurrent users connected to our database.
My questions are:
Will the capacity have an effect on performance? (I have heard mixed results) ie. There is not much available free disk...
The problem is most likely contention from other systems contending for IO. How can we get some good tests? EVAPerf?
Thanks.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-14-2010 10:51 PM
тАО07-14-2010 10:51 PM
Re: EVA 6110 with FC and FATA groups - Slow!!
There's quite a big difference between the FC and the FATA disks.
FATA disks are about 1/3 as fast as the FC disks.
A lot of times the performance is not fast because the vdisks are not balanced between the EVA controllers. You can see which is the owner by looking under presentation.
Some times the vdisk are balanced 50/50, probably also good to balance them based on load.
Are both DGs full? How many disks/disk type and how much free space do you have?
I believe HP recommends to have an occupancy around 95% but that it may be possible to do with higher if you have many disks.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-14-2010 10:54 PM
тАО07-14-2010 10:54 PM
Re: EVA 6110 with FC and FATA groups - Slow!!
This usage can damage the drives and it can slow down the whole array, because valuable cache space is blocked - try to turn of writeback caching on all virtual disks stored in FATAl disk groups.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:30 AM
тАО07-15-2010 12:30 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
the FC DG is about 99% full, the FATA DG is about 90% full.
I'm aware that the load on the controllers might not be optimal at the moment, especially when MPIO isn't configured properly on the Win2k8 R2 boxes to use full multipaths optimizing all 4 possible paths to the EVA. We are seeing one controller take most of the work and the other controller not doing much! I have a case logged with HP regarding configuring MPIO to properly load balance, I believe it should be (round robin with subset and all paths=Active/Optimized?) currently 2 paths are Active/Optimized and the other 2 are Active/Unoptimized.
------
The data is mainly databases (Jade databases to be exact) they are large object oriented DB's, there isn't many small files.
The FATA DG's are used for test and the FC DG's are used for production.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:34 AM
тАО07-15-2010 12:34 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
ALB .. ALP? Is that what it was called? The multipathing algorithm that senses which path is going to the owning controller.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:37 AM
тАО07-15-2010 12:37 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
All VDisks:
Preferred path/mode: No preference
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:39 AM
тАО07-15-2010 12:39 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
Especially proxied read I/Os are bad.
Non-preferred means that the EVA does a round-robin assignment during boot, but hosts with 'non-optimal' MPIO settings can kill that and in the extreme case force ownership of all vdisks to one controller.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:41 AM
тАО07-15-2010 12:41 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:43 AM
тАО07-15-2010 12:43 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
I need to setup MPIO on the server(s) for all paths to Active/Optimized? (as only 2 paths are at the moment)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-15-2010 12:47 AM
тАО07-15-2010 12:47 AM
Re: EVA 6110 with FC and FATA groups - Slow!!
If a host does read I/Os through the non-owning controller, this one asks the owning controller to 'pick up' the data from the disks and sends it back through the mirror port.
What you want to do is:
- configure ownership (=path preferrence in CV-EVA) to divide all vdisk across both controllers)
- turn on ALB in the MPIO.
This makes sure that I/Os are only using the "optimized" paths and the "non-optimized" ones only used in case of a failover.