Thanks for the info, perhaps it's time to get a NFS license for my
filers.
-----Original Message-----
From: Glenn Dekhayser [mailto:gdekhayser@voyantinc.com]
Sent: 11 July 2007 14:55
To: Davies,Matt; Scott Lowe; Forest Leonard; toasters@mathworks.com
Subject: RE: List still active?
Advantages IMHO
1) VMDKs on NFS are by default THIN-Provisioned;
2) Throughput is about equal
3) NFS is a heck of a lot easier to administer
4) There's 3x longer history and knowledgebase on NFS network
t-shooting.
Dis-Advantages:
1) You can do a QLogic iSCSI card to offload CPU processing of packets;
2) In a big environment you can use iSNS;
3) You can be much more granular with masking/etc (although I can
imagine you can be creative with NFS)
4) NFS is stateless (v2), to be run fastest you use UDP; so to make it
reliable it gets a little slower (but still not a real biggie)
-----Original Message-----
From: owner-toasters@mathworks.com [mailto:owner-
toasters@mathworks.com] On Behalf Of Davies,Matt
Sent: Wednesday, July 11, 2007 9:35 AM
To: Scott Lowe; Forest Leonard; toasters@mathworks.com
Subject: RE: List still active?
Scott,
Any chance you could expand on the advantages of NFS over Iscsi ? NFS
isn't an area I have any experience of....
Cheers
Matt
-----Original Message-----
From: owner-toasters@mathworks.com [mailto:owner-
toasters@mathworks.com]
On Behalf Of Scott Lowe
Sent: 11 July 2007 14:05
To: Forest Leonard; toasters@mathworks.com
Subject: Re: List still active?
Forest,
When it comes time to configure VMkernel for VMotion, then I'd
definitely recommend keeping it separate from the virtual machine
network. As it stands right now, you don't even need a VMkernel NIC
configured because it sounds like you are using Qlogic iSCSI HBAs and
only have a single ESX Server. Since the Qlogic cards handle the
iSCSI traffic and there is no VMotion, there no current need for a
VMkernel NIC (unless you want to use NFS from the FAS to provide
additional storage for VMs--which, by the way, works pretty well and
has some nice advantages over iSCSI, IMHO).
Regards,
Scott Lowe
ePlus Technology, Inc.
slowe@eplus.com
On Jul 11, 2007, at 8:33 AM, Forest Leonard wrote:
Interesting stuff. I only have one ESX server so I haven't gotten
to the
Vmotion configuration yet.. That should be later this year.
I just configured a RDM to run a Virtual server on. I found an
article
where you want to create the type as NTFS if it is a RDM for a
windows
host. Not sure if I am going to use this going forward. I actually
don't
know if you can migrate into a RDM. It doesn't look like it.
I am only using 2 NIC's on my Vmware server.. and a QLOGIC card for
my
ISCSI access.. I may need to look at bulking up my NIC
configuration. It
looks like I may gain some performance if I separate my VMKernal
from my
Virtual Machine network?
Thanks,
Forest
-----Original Message-----
From: Davies,Matt [mailto:MDAVIES@generalatlantic.com]
Sent: Wednesday, July 11, 2007 8:18 AM
To: Forest Leonard; ggwalker@mindspring.com; toasters@mathworks.com
Subject: RE: List still active?
Sounds like we are both at the same stage.
We are not using RDM's yet, however when it comes to exchange we
have to, or I may just stick with using the Microsoft Iscsi
initiatator
from within the VM, not exactly supported, but I know of other
doing it.
We have migrated 8 machines so far, into just one datastore and
have not
seen any performance problems at all, although most of the machines
have
very low IO requirements.
We are using a script to snapshot and then replicate using
snapmirror,
it works very well, however our Virtual Centre server is also a VM
which
was causing a few problems with the snapshots on the VMware side not
being removed, but moving this to a separate datastore seems have
cured
the problems, even SQL doesn't seem to have a problem.
The script is the one written by Evan Battle, that is in the newest
netapp docs on VMware. I did have a few problems with ssh to the
filer,
but we are now using rsh and it seems to be ok.
I don't know how you have setup your virtual switches on the ESX
side,
but I got some best practice information out of VMware on that
subject.
Each of our ESX IBM3550 host servers have 6 Nics, connected as
follows.
2 Nics for service console VMKernel for Vmotion, load balance using
Virtual port ID
2 Nics for Virtual Machine network, load balance using Virtual port
ID
2 Nics for ISCSI (Service Console and VMKernel), load balance using
IP
Hash
Hope this helps....
-----Original Message-----
From: Forest Leonard [mailto:fleonard@rvigroup.com]
Sent: 11 July 2007 11:06
To: Davies,Matt; ggwalker@mindspring.com; toasters@mathworks.com
Subject: RE: List still active?
Hey Matt... I am actually doing the exact same thing on a FAS 270..
have migrated about 7 servers so far.
Are you using RDM's (remote device mappings) for the Virtual
Machines? I
actually just created 2 200GB LUNs on the netapp to use as
and have not had any performance issues.
Just wondering what your experience with RDM's are.. I added one
into a
virtual machine.. It just lets you map a LUN directly to a Virtual
machine.
Has anyone out there used the netapp script to capture a VM
Thanks,
Forest
From: owner-toasters@mathworks.com on behalf of Davies,Matt
Sent: Wed 7/11/2007 1:00 AM
To: ggwalker@mindspring.com; toasters@mathworks.com
Subject: RE: List still active?
Still working by the looks of things.
busy in process of migrating all our physical severs to VM, stored
on a
iscsi lun on a FAS 270.
For those that want to know we are using the software iscsi
within ESX and have not had any problems so far.
cheers
matt
-----Original Message-----
From: owner-toasters@mathworks.com owner-toasters@mathworks.com
To: toasters@mathworks.com toasters@mathworks.com
Sent: Wed Jul 11 01:03:49 2007
Subject: List still active?
I've noticed that I'm still subscribed, but have received no email
since
July 4th. Everyone didn't trade their NetApp gear for something
while I was out of town did they?? J
This e-mail (including all attachments) is confidential and may be
privileged.
It is for the exclusive use of the addressee only. If you are not
addressee,
you are hereby notified that any dissemination of this
communication is
strictly
prohibited. If you have received this communication in error, please
erase all
copies of the message and its attachments and notify us immediately
at
help@generalatlantic.com mailto:help@generalatlantic.com. Thank
You.
######################################################################
##
#############
Note:
If you have received this message in error, please notify the
original
sender immediately by telephone (203)975-2100 or by return e-mail,
and
delete the message, along with any attachments from your computer.
If
you have received this message in error, you are hereby notified
any dissemination, distribution or copying of this e-mail, and any
attachments thereto, is strictly prohibited.This note is also to
notify
the recipient of this email that it has been scanned for all known
viruses and attacking techniques. Thank you. http://www.rvigroup.com
######################################################################
##
#############
######################################################################
###############
Note:
If you have received this message in error, please notify the
original sender immediately by telephone (203)975-2100 or by return
e-mail, and delete the message, along with any attachments from
your computer. If you have received this message in error, you are
hereby notified that any dissemination, distribution or copying of
this e-mail, and any attachments thereto, is strictly
prohibited.This note is also to notify the recipient of this email
that it has been scanned for all known viruses and attacking
techniques. Thank you. http://www.rvigroup.com
######################################################################
###############
Davies,Matt