OK, got as far as trying to run vfiler migrate on a test vfiler and got the below. Source is a v3170 running 7.3.5.1P5, target is a 3240 running 8.0.2P5 (7 mode). Can we use vfiler migrate or vfiler dr to move this vfiler? Or are we hitting the NVRAM / version problem?
target> vfiler migrate start vfilerX@source source's Administrative login: source's Administrative password: Configuring SnapMirror to transfer vfiler vfilerX's data from remote filer source. After migrate, configure vfiler IP address 999.999.999.999? [y]: Interface to assign this address to {e0M, ifgrp1}: ifgrp1 Netmask to use: [255.255.254.0]: Starting snapmirror initialize commands. It could take a very long time when the source or destination filers are involved in many simultaneous transfers. The console will not be available until all initialize commands are started successfully. Please use the "snapmirror status" command on the source filer to monitor the progress.
Volume 'vfilerX_root' is now restricted. Unable to initialize SnapMirror for migrating vfilerX : replication transfer failed to complete. target>
-----Original Message----- From: Gelb, Scott [mailto:sgelb@insightinvestments.com] Sent: Tuesday, March 13, 2012 8:29 AM To: Randy Rue Cc: toasters@teaparty.net Subject: RE: migrate a vfiler between different HA clusters?
Once start is run the target snapmirror.conf file is updated with 0-59/3 entries (vfiler dr does the same thing). That usually isn't what is desired to run every 3 minutes, so most change to whatever is needed... once or twice a day, every hour, or whatever makes sense. Even staggering the mirrors. Then before the complete most customers manually keep mirrors more updated or update .conf to keep them closer in updates.
Once complete is run the source vFiler is stopped and destroyed. The final mirror waits for complete, quiesce and break then the target vFiler is brought up. The data on the source is left intact, so if you needed to go back to the source, you can run "vfiler create -r" ... the -r allows you to pick up the root volume of the vfiler (without any other volume names needed) and the vFiler is recreated as it was before, except the network is unconfigured... run ifconfig for each interface to reconfigure the network on the source.
vFiler DR would allow you to DR activate the target and leave the source up. It can be used for migrations as well but realize that you might have a split brain if you don't turn off protocol to the source vFiler. That may be a better solution for you since it keeps the source intact. You could stop the source vFiler, run mirror updates then vfiler dr activate the target. The source would still be there but in a stopped state. Just beware that any reboot or cluster takeover event would restart the vFiler. A stopped state is not persistent on reboot (although you could put a vfiler stop vfilername entry in /etc/rc just in case while you test the target and confirm it is working), then destroy the source vfiler later).
For throttling...standard snapmirror kbs throttling and the same licensing... multistore and snapmirror. Also confirm the target has matching protocol licenses like cifs, nfs, iscsi if used in the source vfiler.
-----Original Message----- From: Randy Rue [mailto:rrue@fhcrc.org] Sent: Tuesday, March 13, 2012 8:22 AM To: Gelb, Scott Cc: toasters@teaparty.net Subject: RE: migrate a vfiler between different HA clusters?
Once the "start" command is run, do I basically have a working snapmirror set up between the source and target volumes? Can it be tuned for sync time like a regular snapmirror?
Once the "complete" command is run, is the source vfiler destroyed? If so, is there a way to not do that? Ideally I'd like the source to stay where it is but remain stopped.
OK, did some reading in the man pages. Looks like "vfiler dr -s" is more like what I'm picturing, where the target is kept current in realtime to the source. Does anyone know what the performance overhead is like? Can it be throttled? What licensing is needed?
-----Original Message----- From: Gelb, Scott [mailto:sgelb@insightinvestments.com] Sent: Tuesday, March 13, 2012 8:08 AM To: Randy Rue Cc: toasters@teaparty.net Subject: RE: migrate a vfiler between different HA clusters?
Yes... -nocopy was formerly called SnapMover but is now included without a license. Without -nocopy, SnapMirror is used. The target is higher ONTAP and meets the SnapMirror rules for the mirror. There is no guarantee on the time to cutover, but it will work. I would test the time it takes to SnapMirror update every volume and keep the mirrors up to date as close as possible...then when idle with a low lag, run the vfiler migrate complete.
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Randy Rue Sent: Monday, March 12, 2012 4:09 PM Cc: toasters@teaparty.net Subject: Re: migrate a vfiler between different HA clusters?
OK, did a little reading. I've used vfiler migrate in the past but with the -nocopy switch and between nodes of the same HA cluster. I also didn't use the start and complete arguments.
Looks like if I set up target volumes with the same names as the source, and have snapmirror licensed on both clusters, this might work. Will it work between a 7.3.5 source and a 8.0.2 target?
The destination is on a new subnet. When I run the complete argument will the vfiler come up OK but with bad network settings?
----- Original Message ----- From: "Randy Rue" rrue@fhcrc.org Cc: toasters@teaparty.net Sent: Monday, March 12, 2012 3:45:24 PM Subject: Re: migrate a vfiler between different HA clusters?
vfiler migrate works between separate physical NetApp clusters? In different datacenters? How long would the outage be to move a 10TB vfiler?
----- Original Message ----- From: "Scott Gelb" sgelb@insightinvestments.com To: "Randy Rue" rrue@fhcrc.org, toasters@teaparty.net Sent: Monday, March 12, 2012 3:18:05 PM Subject: RE: migrate a vfiler between different HA clusters?
You can use "vfiler migrate" from the command line. It does not guarantee a 120 second failover like Data Motion for vFilers but that will create the target vFiler. You have to precreate the volumes and ipspaces on the target system first then issue the commands on the target. With ONTAP 8.1 (not GA yet) it does support different sized NVRAM (bigger to smaller) as well as faster to slower disk technologies (for example SAS to SATA) where 7.3.x did not support that as you mentioned below.
Your choices are vfiler migrate manually, or wait to upgrade to 8.1 (assuming you meet the other data motion criteria besides nvram).
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Randy Rue Sent: Monday, March 12, 2012 3:01 PM To: toasters@teaparty.net Subject: migrate a vfiler between different HA clusters?
Hello All,
We have a vfiler "x" currently sitting on one node of a v3170 HA pair. We want to move it to a new 3240 HA pair.
Looks like the automagic tools that NetApp offers for this can't work for us because a) the destination filer has less NVRAM than the source, and b) the source is at 7.3.5 and the destination 8.0.2.
We could create a new vfiler on the destination and snapmirror every volume. But we don't use qtrees. There are default qtrees on the dozen or two volumes on the source vfiler, but these can't be snapmirrored to the destinations as (if I understand this correctly) directly as the snapmirror process first deletes the destination qtree and then recreates it. And if you delete the default qtree (qtree0) for a volume you delete the volume. In other words, this path would require we create a qtree below the default and end up with an added folder in the path of the copied destination folder, and need to touch every client that connects to the export.
The new HA pair is in a different subnet than the source. So the IP address of the vfiler will change. But ideally nothing else should.
Anybody got any ideas for how to do this short of creating a new vfiler from scratch and using rsync to move all the data via NFS? RE-assigning DNS names and AD memberships during a switchover outage?
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