ATA Over Ethernet tools

Brian Koebbe | 21 Sep 2009 17:11

aoe not building against 2.6.31

It looks like aoe-72 isn't quite building against 2.6.31... I'm getting the following error:

CC [M] /root/aoe6-72/linux/drivers/block/aoe/aoeblk.o
/root/aoe6-72/linux/drivers/block/aoe/aoeblk.c: In function 'aoeblk_request':
/root/aoe6-72/linux/drivers/block/aoe/aoeblk.c:255: error: implicit declaration of function 'elv_next_request'
/root/aoe6-72/linux/drivers/block/aoe/aoeblk.c:255: warning: assignment makes pointer from integer without a cast
/root/aoe6-72/linux/drivers/block/aoe/aoeblk.c:256: error: implicit declaration of function 'blkdev_dequeue_request'

Any chance a patch for this is around the corner?

Thanks,
Brian

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Ed Cashin | 21 Sep 2009 19:15

Re: aoe not building against 2.6.31

On Mon, Sep 21, 2009 at 10:11:56AM -0500, Brian Koebbe wrote:
> It looks like aoe-72 isn't quite building against 2.6.31...
...
> Any chance a patch for this is around the corner?

Yes, I'm integrating them into the compatibility system for
73.  You can try them out now.  I'll try attaching them here.
To use them, you do...

make KDIR=/usr/src/kernels/linux-2.6.31
patch -p0 < /tmp/aoe6-72-blk_peek_req.diff 
patch -p1 < conf/23-patches/old-new.diff
patch -p0 < /tmp/aoe6-72-blk_run_queue.diff 
patch -p1 < /tmp/72-no-autoload.diff
patch -p1 < /tmp/72-73pre1.diff
make KDIR=/usr/src/kernels/linux-2.6.31

Notice that one patch is part of the aoe sources already.

-- 
  Ed Cashin <ecashin@...>
  Find experimental aoe Linux driver patches at
  http://coraid.typepad.com/aoe_linux_proving_grounds/

Attachment (aoe6-72-blk_peek_req.diff): text/x-diff, 1466 bytes

Attachment (aoe6-72-blk_run_queue.diff): text/x-diff, 344 bytes

Attachment (72-no-autoload.diff): text/x-diff, 1312 bytes

Attachment (72-73pre1.diff): text/x-diff, 360 bytes

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Brian Koebbe | 21 Sep 2009 21:21

Re: aoe not building against 2.6.31

Thanks a lot. It's working great so far.

On Mon, Sep 21, 2009 at 12:15 PM, Ed Cashin <ecashin-kFqnmIA2sJXQT0dZR+AlfA@public.gmane.org> wrote:

On Mon, Sep 21, 2009 at 10:11:56AM -0500, Brian Koebbe wrote:
> It looks like aoe-72 isn't quite building against 2.6.31...

...
> Any chance a patch for this is around the corner?

Yes, I'm integrating them into the compatibility system for
73. You can try them out now. I'll try attaching them here.
To use them, you do...

make KDIR=/usr/src/kernels/linux-2.6.31
patch -p0 < /tmp/aoe6-72-blk_peek_req.diff
patch -p1 < conf/23-patches/old-new.diff
patch -p0 < /tmp/aoe6-72-blk_run_queue.diff
patch -p1 < /tmp/72-no-autoload.diff
patch -p1 < /tmp/72-73pre1.diff
make KDIR=/usr/src/kernels/linux-2.6.31

Notice that one patch is part of the aoe sources already.

--
Ed Cashin <ecashin-kFqnmIA2sJXQT0dZR+AlfA@public.gmane.org>
Find experimental aoe Linux driver patches at
http://coraid.typepad.com/aoe_linux_proving_grounds/

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Ed Cashin | 22 Sep 2009 23:01

aoe6-73pre2 has 2.6.31 support

Hi.  There's a prerelease of the next aoe tarball here:

  http://support.coraid.com/support/linux/aoe6-73pre2.tar.gz

It adds compatibility with 2.6.31, while aiming to preserve backwards
compatibility.  When backwards compatibility has been tested, aoe6-73
will be released.

--

-- 
  Ed Cashin
  http://noserose.net/e/
  http://www.coraid.com/

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Steve | 27 Sep 2009 17:59

Recommended gigabit switches?

Hi,

Is there a list of recommended gigabit switches that are known to work well with jumbo frames & AOE, or a list of switches known not to work well? Netgear and Dlink GE switches are cheaper than HP and Cisco equivalents - is there a difference? What are the technical aspects of a switch that I should be comparing for use with AOE?

Thanks,
Steve

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kelsey hudson | 27 Sep 2009 18:19

Re: Recommended gigabit switches?

Steve wrote:
> Is there a list of recommended gigabit switches that are known to work 
> well with jumbo frames & AOE, or a list of switches known not to work 
> well?  Netgear and Dlink GE switches are cheaper than HP and Cisco 
> equivalents -  is there a difference? What are the technical aspects of 
> a switch that I should be comparing for use with AOE?

When it comes to networking gear you really do get what you pay for. I'd 
stick with an HP, Cisco, Foundry (now Brocade, I guess), or Nortel. 
Avoid any manufacturer that also has products in the home office line 
like Netgear, D-Link, Linksys, etc. as they'll either immediately or 
later-on down-the-road give you issues. Issues are definitely not 
something you want on your storage area network. Stay away from 
garbageware switches!

That said, I've had very good luck with Cisco 3560G models and HP 2800 
series. The HPs are about 1/4 to 1/2 the price of the Cisco, and come 
with a lifetime warranty, lifetime software upgrades, and a couple other 
benefits. I'd reccommend the HP if you don't have a requirement for the 
rich featureset the Cisco brings to the table.

good luck,

--

-- 
Kelsey Hudson
Sr. Systems Administrator, DrJays.com
9180 Camino Santa Fe, San Diego, CA 92121
888.437.5297x134 (desk)    619.852.6374 (cell)

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Mark Sutton | 27 Sep 2009 18:09

Re: Recommended gigabit switches?

Hi Steve,

On 27 Sep 2009, at 16:59, Steve wrote:

Hi,

Is there a list of recommended gigabit switches that are known to work well with jumbo frames & AOE, or a list of switches known not to work well? Netgear and Dlink GE switches are cheaper than HP and Cisco equivalents - is there a difference? What are the technical aspects of a switch that I should be comparing for use with AOE?

It's worth noting that the Procurve 2800 series and lower don't support jumbo frames and flow control enabled at the same time, which is nice to have... We have definitely had problems with AoE on Procurve 2848 under high load conditions as these switches quickly run out of buffers with high packet rates and jumbo frames.

We've had great success with Procurve 5406zl switches though...

Regards,

Mark Sutton

Fubra Limited

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Hilko Bengen | 27 Sep 2009 19:57

Re: Recommended gigabit switches?

* Steve:

> Is there a list of recommended gigabit switches that are known to work
> well with jumbo frames & AOE, or a list of switches known not to work
> well?

Do not use Cisco/Linksys SLM2005/2008 "web managed" switches. I have
experienced data corruption and what appears to be hangs and reboots
from those devices in a setup involving jumbo frames and VLANs.

I have experienced no problems with a HP ProCurve 2810 in an otherwise
identical setup.

-Hilko

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Justin C. Darby | 28 Sep 2009 13:35

Re: Recommended gigabit switches?

I'm a little late, but I've heard good things about the new 3com/H3C
lineup. http://h3cnetworks.com/ (Note: I don't work for these guys or
any other network vendor and I myself am running on a Cisco N7K. They
just seem to have compelling products that are more than price
comparative to Cisco/HP.)

Justin

On Sun, Sep 27, 2009 at 10:59 AM, Steve <pupfuzz@...> wrote:
> Hi,
>
> Is there a list of recommended gigabit switches that are known to work well
> with jumbo frames & AOE, or a list of switches known not to work well?
> Netgear and Dlink GE switches are cheaper than HP and Cisco equivalents -
> is there a difference? What are the technical aspects of a switch that I
> should be comparing for use with AOE?
>
> Thanks,
> Steve
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay
> ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33;
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Aoetools-discuss mailing list
> Aoetools-discuss@...
> https://lists.sourceforge.net/lists/listinfo/aoetools-discuss
>
>

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Steve | 28 Sep 2009 20:11

Re: Recommended gigabit switches?

Thanks to everyone who responded.

From the responses on this list plus a google search for iSCSI switches, it seems that the HP Procurve line is a good choice for price/performance. The Procurve 2800/2810 seems to be the bare minimum, but the 2900 series is a better choice if you can afford it, with larger packet buffers. I'll be going with either a 2810 or a 2900.

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