Hi guys, Thought I'd better let everyone know how I got on with my disk arrays. :)
First of all, thanks *heaps* to everyone who offered advice and tried to help me with this. I had fun experimenting and learning and I am now much better equiped to deal with any future problems with AoE. What ended up happening was that I updated the BIOS on the RAID card I am using to see if anything would happen. It was 10 builds (same version) newer than the one I was currently using. I installed it successfully on both machines and went through all the procedures again to build a target AoE device. I formatted it as ext3, (I was using ext2 before) and watched the disk IO from the target machine. What should happen, but I start seeing write speeds like 60MB/sec and NO reads! I was elated! Then I wanted to know whay it was only 60MB/sec... Went and looked at das lights enblink (excuse my bad German) and saw it was using the single spindle, which I tested earlier at the same speed natively. So I threw together an LVM partition on a RAID10 device, and tested again. Consistant speeds of about 140-150MB/sec, sustained! I went back and found the release notes for the BIOS upgrade and it turned out to be a one-liner (well, three, bvut you get the point)... I quote: ***** 3. Enhancements and Bug Fixes: ============================== - Fixed functionality issues with Supermicro SAS backplanes that are updated to "Boot 3" code - Fixed SATA drive discovery issues with Intel SC5400 SAS backplanes - Added support for Astek SAS backplanes ***** I am indeed using a Supermicro case/backplane. So this seems to be the problem I was looking for. I can now get speeds in excess of 140MB/sec and have verified that when *writing* a filesystem, it's not spending all it's time *reading* the filesystem. :) I see there is another version of vblade out today, also. Good work for getting it out, guys! But does it solve the cache alignment error? (*ducks*) Anyway, thanks again to everyone. I have now officially entered the world of AoE! Regards, Phillip. ----- Original Message ----- From: "maht" <[EMAIL PROTECTED]> To: "kelsey hudson" <[EMAIL PROTECTED]>; "Phillip Bennett" <[EMAIL PROTECTED]> Cc: <[email protected]> Sent: Monday, July 14, 2008 9:24 AM Subject: Re: [Aoetools-discuss] Introduction > On Thu, 10 Jul 2008 20:56:26 +0100, kelsey hudson <[EMAIL PROTECTED]> > wrote: >> I'll >> forewarn you though: plan9 has horrible hardware support, largely >> cause nobody uses it. Coraid was the first outside Bell Labs I've seen >> at use it in production Say Hi to Glenda for me. > > Your value of Nobody is a little low, you need to look a bit harder. > But you're right; one has to match the hardware to Plan 9, not the other > way around (usually). > > I know we don't have "Plan 9 inside" stickers on stuff but we do exist in > the wild. > > Don't come to Glenda for raw speed on comparative hardware, you'll be > disappointed. > > However you might have enjoyed the Sydney Olympics where Plan 9 was used > to control the stadium lighting system > It is also used in some Lucent Mobile phone masts with a hard RT kernel. > And a few of us have our internet facing servers running Plan 9. > Oh and IBM run it on one of their 64,000 CPU Blue Gene super-computing > systems, but mainly for research. > It is from Coraid and IBM that some high bandwidth devices do have drivers > for fibre and whatnot. > > Plan 9's networked nature means you can serve a vblade from files on any > transport from remote machines, not just over TCP/IP. > > see you in irc://irc.freenode.org/#plan9 or on the mailing list : > [EMAIL PROTECTED] > > matt > > p.s. sorry if this is a dupe, I'm playing with Opera and it cheated on me > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Aoetools-discuss mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/aoetools-discuss
