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RE: [Xen-users] disk backend performance

To: "'Joseph L. Casale'" <JCasale@xxxxxxxxxxxxxxxxx>, "'Xen Users'" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] disk backend performance
From: "Venefax" <venefax@xxxxxxxxx>
Date: Fri, 28 Nov 2008 12:05:46 -0500
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It will be AOE, but I find weird that I cannot write to the virtual disk
exported from the container box. There must be a way to mount it on the
container without the packets having to go round trip. Like cluster file
system, but how? I could install a cluster file system on the client side,
but if I need open a file from the server side, the packets would still go
around the wire.
Am I wrong?

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Joseph L. Casale
Sent: Friday, November 28, 2008 11:57 AM
To: 'Xen Users'
Subject: RE: [Xen-users] disk backend performance

>My system disk is a raid 5 array, 800 GB, so it has plenty of throughput.
>But you say that any technique even NFS or even SAMBA, versos creating a
>file and sharing it via AOE will be comparable?
>Which technique would you pick? I have a back-to-back 1 GB Ethernet cable
>between the two servers.

Given that you're still using one array for everything, I would just use
whatever is most convenient. Although AoE has some apparent advantages, I am
not a fan as it lacks the security that iSCSI has native. I would probably
export an NFS directory or use iSCSI and export a file using fileio mode.

OTOH, your network between the two is pretty secure :) Use AoE...

I wouldn't even consider Samba, why muddy the waters sharing data between
hosts emulating a non native Linux protocol. That's just silly?

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