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rbreidenstein Enthusiast 86 posts since
Apr 1, 2004
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Jul 11, 2005 7:23 PM

ATA over ethernet (AoE)

i don't know much about AoE, but it seems like a decent low cost SAN solution.

kimono Master 1,996 posts since
Mar 3, 2005
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1. Jul 12, 2005 3:36 AM in response to: rbreidenstein
Re: ATA over ethernet (AoE)

aren't you going to tell us more about it?

/kimono/
blackpuma Hot Shot 210 posts since
May 5, 2005
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3. Jul 12, 2005 8:34 AM in response to: rbreidenstein
Re: ATA over ethernet (AoE)

The June 2005 Re: ATA over ethernet (AoE)Linux Journal[/i] has a nice article on AoE.

 

AoE is new and promising. I'm looking forward to expermenting with it.

blackpuma Hot Shot 210 posts since
May 5, 2005
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5. Jul 12, 2005 8:42 AM in response to: rbreidenstein
Re: ATA over ethernet (AoE)

Here's the June 2005 Re: ATA over ethernet (AoE)Linux Journal[/i] article about AoE. It's a non-routable network protocol that's more primitive than IP, giving enough capability for a server to (1) identify existing AoE disks and (2) send ATA commands and transfer data as any other ATA disk controller. 

 

http://www.linuxjournal.com/article/8149

 

With gigabig ethernet, LVM, and filesystems that can be expanded, one has unlimited control over how the disks can be sliced and diced.

Ken.Cline Champion 5,167 posts since
Jul 7, 2004
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6. Jul 12, 2005 10:28 AM in response to: blackpuma
Re: ATA over ethernet (AoE)

Since it's still talking the ATA protocol, don't expect to see support in ESX anytime in the near future. ATA is still not a "datacenter class" solution - and since it would require the inclusion of a complete ATA stack in ESX, there's not much benefit to it yet.

 

Especially when you can plug SATA into your SAN (whether FC attached or iSCSI) and get many of the cost benefits while retaining the benefits of "good old SCSI" - I don't really see the justification...

Ken Cline VMware vExpert 2009 VMware Communities User Moderator Blogging at: http://KensVirtualReality.wordpress.com/
jmpnz Novice 10 posts since
Aug 4, 2005
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7. Nov 30, 2005 8:49 PM in response to: Ken.Cline
Re: ATA over ethernet (AoE)

That last AoE comment is nonsensical.  It's like saying ISA bus is no good when you can use SCSI. Apples to tree trunks. AoE is faster and cleaner than iSCSI.

 

AoE is a way of transporting disk commands at layer two across the network.  The AoE  host may actually using be SATA or SCSI devices.

 

May I ask what you mean by having to install a stack for AoE? Did you mean the two layer Ethernet protocol as opposed to the iSCSI four layer TCP/IP protocol?

devzero Master 2,776 posts since
Dec 27, 2004
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8. Dec 1, 2005 7:08 AM in response to: jmpnz
Re: ATA over ethernet (AoE)

never heard of AoE before  - the only one i know about is HyperSCSI, which seems to be similar concept.(->http://www.linuxdevices.com/files/misc/hyperscsi.pdf)

 

what i wonder: are there any "target" implementations for that ? (in software, not in hardware)

 

roland

 

Message was edited by:

        devzero

devzero Master 2,776 posts since
Dec 27, 2004
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9. Dec 1, 2005 4:01 PM in response to: devzero
Re: ATA over ethernet (AoE)

>what i wonder: are there any "target" implementations for that ? (in software, not in hardware)

 

there is!

 

actually, i gave AoE a try.

 

folks - this is cool stuf - and really trivial to get this working.

 

i wonder about that "big noise" regarding iSCSI.

Why isn´t there some more noise about AoE ?

 

who needs a storage protocol being routed over the internet?

 

AoE is small and elegant. I hope this will have a bright future!

 

roland

 

ps:

after reading back to the beginning of this thread, i would call this slightly off-topic, though

jmpnz Novice 10 posts since
Aug 4, 2005
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10. Dec 2, 2005 7:25 PM in response to: devzero
Re: ATA over ethernet (AoE)

Roland,

  Have you gotten AoE to mount as a VMFS?

devzero Master 2,776 posts since
Dec 27, 2004
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11. Dec 3, 2005 1:44 AM in response to: jmpnz
Re: ATA over ethernet (AoE)

hello!

 

no - i didn`t try at all, because i`m not ESX user.

but i'm not sure, if this would work at all - ESX has not IDE/ATA "stack" at all (afaik)

 

regards

roland

devzero Master 2,776 posts since
Dec 27, 2004
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12. Dec 4, 2005 1:07 PM in response to: devzero
Re: ATA over ethernet (AoE)

i'd like to add:

there already is a AoE Target implementation as a linux kernel module - and a windows driver is in beta stage (and actually working)

 

regards

roland

jmpnz Novice 10 posts since
Aug 4, 2005
Currently Being Moderated
13. Dec 7, 2005 6:04 AM in response to: devzero
Re: ATA over ethernet (AoE)

Shoot,

Thats right I forgot about that VMFS is supposed to be on a scsi drive.  I will test this next week, when I have some time and post my results here.

devzero Master 2,776 posts since
Dec 27, 2004
Currently Being Moderated
14. Dec 17, 2005 6:52 AM in response to: jmpnz
Re: ATA over ethernet (AoE)

hello!

 

for trying AoE you need a target implementation - there is vblade at sourceforge.net, but I had some luck in getting an implementation as a kernel module.  it`s weird that it seems to have disappeared from the author's ( Lelik P. Korchagin, lelik@price.ru)  website at http://lpk.com.price.ru/~lelik/

 

I don't know the reason, why the author doesn't provide it to the public at the moment or why he doesn't seem to run a project website for this - but since it is GPL'ed code, i put a copy on http://www.computerkeek.de/projects/AoE/vblade-kernel-0.2.4.tar.gz

 

regards

roland

 

UPDATE: Inaccessibility of the author's website has been a temporary problem

 

Message was edited by:

        devzero

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