I think Flexclone will save a lot of time and IOPS in creating new VMs from your golden image; then you can split the clone and A-SIS after, right?
Glenn (the other one)
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Page, Jeremy Sent: Monday, October 29, 2007 8:33 AM To: toasters@mathworks.com Subject: RE: A-SIS questions
Not sure what flexclone would buy you over ASIS for VMs. That's the main reason I am considering ASIS, something like 4 gig of data per VM minimum will be de-duped. We have quite a few VMs. Add to it sparse provisioning and the fact that we can use snapvault for our backups and I'm pretty excited about it.
-----Original Message----- From: M. Vaughn Stewart [mailto:mvstew@gmail.com] Sent: Saturday, October 27, 2007 5:08 PM To: Jack Lyons Cc: Page, Jeremy; toasters@mathworks.com Subject: Re: A-SIS questions
FlexClone will clone a datastore, for VM level cloning granularity you gonna have to wait I think something is just around the corner.
As for MSCS you need RDMs as VMDKs are not supported with MSCS
RDMs can be either FCP or iSCSI VMDKs can be on NFS or VMFS (which is over FCP or iSCSI)
We are in the process of testing ESX on NFS. We have 2 out of 60 on NFS now. I just started thinking about using flexclones, is any one using flex clones with NFS for creating clones of VM's.
Also, from what I have read, to use MSCS I need to use an RDM from iscsi or FC luns...correct?
Thanks Jack
M. Vaughn Stewart wrote:
Jeremy,
A-SIS has a slight write performance penalty (a few points) and typically also sees a slight read performance gain (of the same amount), so in short customers who are using it love it. Now you don't use it everywhere, like on DB files.
As for VMware on NFS, enjoy your solution it rocks, don't take my word for it. Google VMware on NFS and sort by date, you'll have allot of reading to do. Quotes from executives at EMC and VMware just support what you are deploying. Make sure to see NetApp's TR3428 for deployment details.
See ya Vaughn
I have read some of the info on how A-SIS works but I have a couple of questions:
- Assuming an average compression rate (say /home with random docs
in it) how much of a performance hit does it impose 2) Does it change how much data is sent over the wire when you use SnapMirror/SnapVault? I.e. if I get 30% compression on a 1 gig snapshot do I send 1 gig or 700 mb to update my target?
Oh, and for the folks who helped earlier, we are moving our Oracle and ESX systems to NetApp, the pSeries will be fibre connected, at least at first but the ESX stuff is all going on NFS.
~Jeremy *__* This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.
This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.