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DataMotion for Volumes in 8.1?

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rrue at fhcrc

May 2, 2012, 10:30 AM

Post #1 of 9 (2455 views)
Permalink

DataMotion for Volumes in 8.1?

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
to another (both are 64 bit aggrs). Ultimately I just need to move the
root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising
as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks
a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move
start" keeps failing because I have CIFS and/or NFS running. In fact, if I
turn them both off it still complains that I have NFS exports configured
and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully
live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

fcocquyt at stanford

May 2, 2012, 11:31 AM

Post #2 of 9 (2399 views)
Permalink

Re: DataMotion for Volumes in 8.1? [In reply to]

Randy,

have you tried using the Netapp Management Console (NMC) for this?
I've done a few dozen vFiler migrations using the NMC vFiler migration "wizard" -
it asks you for all the parameters you would otherwise need on the command line and is robust and reliable in my experience.

You get it from the "OnCommand Core Package", via:

https://iyourserver/clients/nmconsole-setup-3-1-win32.exe

I only had resort to a command line vfiler migrate for an offline migration for a special vfiler once.

I'm currently planning 32, 64 bit upgrades with data motion,

Good luck,

Fletcher.

On May 2, 2012, at 10:30 AM, Randy Rue wrote:

> Hello All,
>
> Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
> to another (both are 64 bit aggrs). Ultimately I just need to move the
> root and data volumes for these vfilers.
>
> Not finding a wealth of examples on the "vol move" command, not surprising
> as this is a pretty new feature.
> http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html
>
> NetApp's blurb says this can be done without interruption, but also talks
> a lot about when to do the "cutover." They say the cutover can be
> triggered manually or automatically. But I can't make the "vol move"
> command do anything but return a usage blurb unless I include a "start"
> switch.
>
> Also, their website claims this can be done nondisruptively. But "vol move
> start" keeps failing because I have CIFS and/or NFS running. In fact, if I
> turn them both off it still complains that I have NFS exports configured
> and that I need to remove them first.
>
> Anyone have experience moving volumes from one aggr to another, hopefully
> live?
>
> Randy Rue
> _______________________________________________
> Toasters mailing list
> Toasters [at] teaparty
> http://www.teaparty.net/mailman/listinfo/toasters

andrey.borzenkov at ts

May 2, 2012, 12:38 PM

Post #3 of 9 (2399 views)
Permalink

RE: DataMotion for Volumes in 8.1? [In reply to]

There are two DataMotions today - DataMotion for Volumes and DataMotion for vFilers. The former is supported between aggregates on the same filer and for block protocols (FCP. iSCSI, FCoE) only. This is what "vol move" does. The latter is between different filers only (I am not sure if even two controllers in HA pair are supported) and supports NAS protocol only (probably iSCSI too). To control it DFM (OnCommand Provisioning and Data Protection) is required.

So I am not sure it can be done easily. If you have DFM server and one more filer, moving via it could be the easiest thing :)

________________________________________
From: toasters-bounces [at] teaparty [toasters-bounces [at] teaparty] On Behalf Of Randy Rue [rrue [at] fhcrc]
Sent: Wednesday, May 02, 2012 21:30
To: toasters [at] teaparty
Subject: DataMotion for Volumes in 8.1?

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
to another (both are 64 bit aggrs). Ultimately I just need to move the
root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising
as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks
a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move
start" keeps failing because I have CIFS and/or NFS running. In fact, if I
turn them both off it still complains that I have NFS exports configured
and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully
live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

rrue at fhcrc

May 2, 2012, 2:23 PM

Post #4 of 9 (2394 views)
Permalink

RE: DataMotion for Volumes in 8.1? [In reply to]

Should "yourserver" be the name of the filer? Doesn't seem to work.

Downloaded the OnCommand Core app installer from the NOW page but it wants
a license key on install, even for the "express" option. Is this a
licensed feature?

Randy

From: Fletcher Cocquyt [mailto:fcocquyt [at] stanford]
Sent: Wednesday, May 02, 2012 11:32 AM
To: Randy Rue
Cc: toasters [at] teaparty
Subject: Re: DataMotion for Volumes in 8.1?

Randy,

have you tried using the Netapp Management Console (NMC) for this?

I've done a few dozen vFiler migrations using the NMC vFiler migration
"wizard" -

it asks you for all the parameters you would otherwise need on the command
line and is robust and reliable in my experience.

You get it from the "OnCommand Core Package", via:

https://iyourserver/clients/nmconsole-setup-3-1-win32.exe

I only had resort to a command line vfiler migrate for an offline
migration for a special vfiler once.

I'm currently planning 32, 64 bit upgrades with data motion,

Good luck,

Fletcher.

On May 2, 2012, at 10:30 AM, Randy Rue wrote:

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
to another (both are 64 bit aggrs). Ultimately I just need to move the
root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising
as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks
a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move
start" keeps failing because I have CIFS and/or NFS running. In fact, if I
turn them both off it still complains that I have NFS exports configured
and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully
live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

rrue at fhcrc

May 3, 2012, 8:46 AM

Post #5 of 9 (2391 views)
Permalink

RE: DataMotion for Volumes in 8.1? [In reply to]

To catch up on what I've learned so far:

"vol move" is not a new feature, in fact it seems to be a little-used
older feature intended more for block-level services. I've used it to
successfully move a test vfiler to a different aggregate but only by
stopping and destroying the vfiler, then removing the default exports for
the root and data volumes from vfiler0, and then running vol move
sequentially for the volumes. Then I used the vfiler create NAME -r
/vol/vfiler_root_volume to recreate the vfiler (and then corrected the
broken network settings).

Usable if necessary but I'm looking at this as a last-ditch option.

To tell the whole story, we have a new 3240 that we installed running
8.0.2. Before putting it into production we decided to upgrade to 8.1GA,
and did so with no trouble. Now I'm trying to blow away the old aggregates
so I can build new ones with more spindles. But we do have one volume in
production use, a whopping 100GB of data, but containing binaries for some
HPC processing that is a problem to interrupt for more than a few seconds.
I need a graceful way to move that vfiler to one of the new aggregates so
I can nuke the remaining older ones and finish carving out the disks
optimally for 8.1.

We also need to finally get a grip on NetApp's management options. We run
a badly outdated NOM server, primarily for metrics for customer viewing.
We've used a lot of filerview and the CLI until now, as most of our filers
are still running 7.x or in a few cases 8.0x. But with 8.1 (no filerview)
in the house we need to get modern. I do have OnCommand System Manager 2.0
on my workstation.

Now I understand I need the NMC, which is part of the OnCommand Core. I've
found the installer for the Core, which needs Windows Server (or Linux).

So am I looking at bringing up another "NOM" like server? I get the NM
Console described below from a distribution point on that server? If so, I
can live with that, but when I try to install the Core, I get asked for a
license key. I've found multiple references to the Core being free. One
tip on finding a license key on my NOW page. But if I search my NOM
license page for ONCMD I get No Results Found.

I'd be grateful if anyone can point me toward a noob-level breakdown of
NetApp's management tools in their present state including what is and
isn't included as stock. I have a similar request out to both our VAR and
our NA contacts.

Hope to hear from you,

rrue

From: Fletcher Cocquyt [mailto:fcocquyt [at] stanford]
Sent: Wednesday, May 02, 2012 11:32 AM
To: Randy Rue
Cc: toasters [at] teaparty
Subject: Re: DataMotion for Volumes in 8.1?

Randy,

have you tried using the Netapp Management Console (NMC) for this?

I've done a few dozen vFiler migrations using the NMC vFiler migration
"wizard" -

it asks you for all the parameters you would otherwise need on the command
line and is robust and reliable in my experience.

You get it from the "OnCommand Core Package", via:

https://iyourserver/clients/nmconsole-setup-3-1-win32.exe

I only had resort to a command line vfiler migrate for an offline
migration for a special vfiler once.

I'm currently planning 32, 64 bit upgrades with data motion,

Good luck,

Fletcher.

On May 2, 2012, at 10:30 AM, Randy Rue wrote:

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
to another (both are 64 bit aggrs). Ultimately I just need to move the
root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising
as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks
a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move
start" keeps failing because I have CIFS and/or NFS running. In fact, if I
turn them both off it still complains that I have NFS exports configured
and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully
live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

tmacmd at gmail

May 3, 2012, 9:15 AM

Post #6 of 9 (2394 views)
Permalink

Re: DataMotion for Volumes in 8.1? [In reply to]

If you are moving a volume on the same filer head, but into a different (or
same!) aggregate, then...

Have you all looked at snapmirror migrate:

https://kb.netapp.com/support/index?page=content&id=1010991

And you should get to System Manager 2.0.1 that fixes a nasty bug you
really do not want to hit.

--tmac
Tim McCarthy
Principal Consultant

RedHat Certified Engineer
804006984323821 (RHEL4)
805007643429572 (RHEL5)

On Thu, May 3, 2012 at 11:46 AM, Randy Rue <rrue [at] fhcrc> wrote:

> To catch up on what I've learned so far:****
>
> ** **
>
> "vol move" is not a new feature, in fact it seems to be a little-used
> older feature intended more for block-level services. I've used it to
> successfully move a test vfiler to a different aggregate but only by
> stopping and destroying the vfiler, then removing the default exports for
> the root and data volumes from vfiler0, and then running vol move
> sequentially for the volumes. Then I used the vfiler create NAME -r
> /vol/vfiler_root_volume to recreate the vfiler (and then corrected the
> broken network settings).****
>
> ** **
>
> Usable if necessary but I'm looking at this as a last-ditch option.****
>
> ** **
>
> To tell the whole story, we have a new 3240 that we installed running
> 8.0.2. Before putting it into production we decided to upgrade to 8.1GA,
> and did so with no trouble. Now I'm trying to blow away the old aggregates
> so I can build new ones with more spindles. But we do have one volume in
> production use, a whopping 100GB of data, but containing binaries for some
> HPC processing that is a problem to interrupt for more than a few seconds.
> I need a graceful way to move that vfiler to one of the new aggregates so I
> can nuke the remaining older ones and finish carving out the disks
> optimally for 8.1.****
>
> ** **
>
> We also need to finally get a grip on NetApp's management options. We run
> a badly outdated NOM server, primarily for metrics for customer viewing.
> We've used a lot of filerview and the CLI until now, as most of our filers
> are still running 7.x or in a few cases 8.0x. But with 8.1 (no filerview)
> in the house we need to get modern. I do have OnCommand System Manager 2.0
> on my workstation.****
>
> ** **
>
> Now I understand I need the NMC, which is part of the OnCommand Core. I've
> found the installer for the Core, which needs Windows Server (or Linux).**
> **
>
> ** **
>
> So am I looking at bringing up another "NOM" like server? I get the NM
> Console described below from a distribution point on that server? If so, I
> can live with that, but when I try to install the Core, I get asked for a
> license key. I've found multiple references to the Core being free. One tip
> on finding a license key on my NOW page. But if I search my NOM license
> page for ONCMD I get No Results Found.****
>
> ** **
>
> I'd be grateful if anyone can point me toward a noob-level breakdown of
> NetApp's management tools in their present state including what is and
> isn�t included as stock. I have a similar request out to both our VAR and
> our NA contacts.****
>
> ** **
>
> Hope to hear from you,****
>
> ** **
>
> rrue****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* Fletcher Cocquyt [mailto:fcocquyt [at] stanford]
> *Sent:* Wednesday, May 02, 2012 11:32 AM
> *To:* Randy Rue
> *Cc:* toasters [at] teaparty
> *Subject:* Re: DataMotion for Volumes in 8.1?****
>
> ** **
>
> Randy, ****
>
> ** **
>
> have you tried using the Netapp Management Console (NMC) for this?****
>
> I've done a few dozen vFiler migrations using the NMC vFiler migration
> "wizard" - ****
>
> it asks you for all the parameters you would otherwise need on the command
> line and is robust and reliable in my experience.****
>
> ** **
>
> You get it from the "OnCommand Core Package", via:****
>
> ** **
>
> https://iyourserver/clients/nmconsole-setup-3-1-win32.exe****
>
>
>
> ****
>
> I only had resort to a command line vfiler migrate for an offline
> migration for a special vfiler once.****
>
>
>
> ****
>
> I'm currently planning 32, 64 bit upgrades with data motion,****
>
>
>
> ****
>
> Good luck,****
>
>
>
> ****
>
> Fletcher.
>
>
> ****
>
> ** **
>
> On May 2, 2012, at 10:30 AM, Randy Rue wrote:****
>
>
>
> ****
>
> Hello All,
>
> Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
> to another (both are 64 bit aggrs). Ultimately I just need to move the
> root and data volumes for these vfilers.
>
> Not finding a wealth of examples on the "vol move" command, not surprising
> as this is a pretty new feature.
> http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html
>
> NetApp's blurb says this can be done without interruption, but also talks
> a lot about when to do the "cutover." They say the cutover can be
> triggered manually or automatically. But I can't make the "vol move"
> command do anything but return a usage blurb unless I include a "start"
> switch.
>
> Also, their website claims this can be done nondisruptively. But "vol move
> start" keeps failing because I have CIFS and/or NFS running. In fact, if I
> turn them both off it still complains that I have NFS exports configured
> and that I need to remove them first.
>
> Anyone have experience moving volumes from one aggr to another, hopefully
> live?
>
> Randy Rue
> _______________________________________________
> Toasters mailing list
> Toasters [at] teaparty
> http://www.teaparty.net/mailman/listinfo/toasters****
>
> ** **
>
> _______________________________________________
> Toasters mailing list
> Toasters [at] teaparty
> http://www.teaparty.net/mailman/listinfo/toasters
>
>

jkennedy at qualcomm

May 3, 2012, 3:07 PM

Post #7 of 9 (2400 views)
Permalink

RE: DataMotion for Volumes in 8.1? [In reply to]

I don't know about DataMotion but our team has tested vfiler migrate between cluster partners and it works seemingly fine. It even worked despite the documentation indicating it shouldn't, at least not for how we're setup. We use qtrees exclusively for mounting and the documentation indicated that clients mounting qtrees would need to re-mount; this was not the case. Vfiler migrate caused the client to hang and report NFS server not responding but once complete the client operations continued without a re-mount and no hung mounts. A nice surprise given the documentation.

Something else (besides the transparency of qtree mounts during a vfiler migrate) that we've not found a definitive answer to is whether or not a volume limit exists. At one point in the documentation it uses 20 volumes as an example of a DFM managed migration, but nothing that says "the maximum volume count is.....". We've checked with support as well, the answer is no known limit.
Has anyone done a transparent vfiler migrate of more than 20 volumes?

We'll be testing this in our lab but haven't gotten to it yet.

Jeff Kennedy
Qualcomm, Incorporated
QCT Engineering Compute
858-651-6592

-----Original Message-----
From: toasters-bounces [at] teaparty [mailto:toasters-bounces [at] teaparty] On Behalf Of Borzenkov, Andrey
Sent: Wednesday, May 02, 2012 12:39 PM
To: Randy Rue; toasters [at] teaparty
Subject: RE: DataMotion for Volumes in 8.1?

There are two DataMotions today - DataMotion for Volumes and DataMotion for vFilers. The former is supported between aggregates on the same filer and for block protocols (FCP. iSCSI, FCoE) only. This is what "vol move" does. The latter is between different filers only (I am not sure if even two controllers in HA pair are supported) and supports NAS protocol only (probably iSCSI too). To control it DFM (OnCommand Provisioning and Data Protection) is required.

So I am not sure it can be done easily. If you have DFM server and one more filer, moving via it could be the easiest thing :)

________________________________________
From: toasters-bounces [at] teaparty [toasters-bounces [at] teaparty] On Behalf Of Randy Rue [rrue [at] fhcrc]
Sent: Wednesday, May 02, 2012 21:30
To: toasters [at] teaparty
Subject: DataMotion for Volumes in 8.1?

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate to another (both are 64 bit aggrs). Ultimately I just need to move the root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks a lot about when to do the "cutover." They say the cutover can be triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move start" keeps failing because I have CIFS and/or NFS running. In fact, if I turn them both off it still complains that I have NFS exports configured and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

rrue at fhcrc

May 3, 2012, 3:16 PM

Post #8 of 9 (2395 views)
Permalink

RE: DataMotion for Volumes in 8.1? [In reply to]

I've gotten as far as getting the Core installed on a server and
installing the NMC tool from there. I've seen the better vfiler migrate
wizard but haven't made it work yet. Two problems:
* It won't let me migrate from the HA pair node to itself. To use this
I'll need to migrate twice, from the desired node to its partner and back.
Not the end of the world.
* The wizard is complaining about snapmirror licensing on the source node.
I'm running an eval license, waiting to hear back from NA about that.

Worst case is I end up using vol move after all. I've confirmed from the
documentation that it doesn't work within vfilers but with only 100GB on
the vfiler, copying shouldn't take too long.

Will keep you posted,

rrue

-----Original Message-----
From: toasters-bounces [at] teaparty [mailto:toasters-bounces [at] teaparty]
On Behalf Of Kennedy, Jeffrey
Sent: Thursday, May 03, 2012 3:07 PM
To: toasters [at] teaparty
Subject: RE: DataMotion for Volumes in 8.1?

I don't know about DataMotion but our team has tested vfiler migrate
between cluster partners and it works seemingly fine. It even worked
despite the documentation indicating it shouldn't, at least not for how
we're setup. We use qtrees exclusively for mounting and the documentation
indicated that clients mounting qtrees would need to re-mount; this was
not the case. Vfiler migrate caused the client to hang and report NFS
server not responding but once complete the client operations continued
without a re-mount and no hung mounts. A nice surprise given the
documentation.

Something else (besides the transparency of qtree mounts during a vfiler
migrate) that we've not found a definitive answer to is whether or not a
volume limit exists. At one point in the documentation it uses 20 volumes
as an example of a DFM managed migration, but nothing that says "the
maximum volume count is.....". We've checked with support as well, the
answer is no known limit.
Has anyone done a transparent vfiler migrate of more than 20 volumes?

We'll be testing this in our lab but haven't gotten to it yet.

Jeff Kennedy
Qualcomm, Incorporated
QCT Engineering Compute
858-651-6592

-----Original Message-----
From: toasters-bounces [at] teaparty [mailto:toasters-bounces [at] teaparty]
On Behalf Of Borzenkov, Andrey
Sent: Wednesday, May 02, 2012 12:39 PM
To: Randy Rue; toasters [at] teaparty
Subject: RE: DataMotion for Volumes in 8.1?

There are two DataMotions today - DataMotion for Volumes and DataMotion
for vFilers. The former is supported between aggregates on the same filer
and for block protocols (FCP. iSCSI, FCoE) only. This is what "vol move"
does. The latter is between different filers only (I am not sure if even
two controllers in HA pair are supported) and supports NAS protocol only
(probably iSCSI too). To control it DFM (OnCommand Provisioning and Data
Protection) is required.

So I am not sure it can be done easily. If you have DFM server and one
more filer, moving via it could be the easiest thing :)

________________________________________
From: toasters-bounces [at] teaparty [toasters-bounces [at] teaparty] On
Behalf Of Randy Rue [rrue [at] fhcrc]
Sent: Wednesday, May 02, 2012 21:30
To: toasters [at] teaparty
Subject: DataMotion for Volumes in 8.1?

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one aggregate
to another (both are 64 bit aggrs). Ultimately I just need to move the
root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not surprising
as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.html

NetApp's blurb says this can be done without interruption, but also talks
a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol move
start" keeps failing because I have CIFS and/or NFS running. In fact, if I
turn them both off it still complains that I have NFS exports configured
and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another, hopefully
live?

Randy Rue
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters
_______________________________________________
Toasters mailing list
Toasters [at] teaparty
http://www.teaparty.net/mailman/listinfo/toasters

sgelb at insightinvestments

May 3, 2012, 3:40 PM

Post #9 of 9 (2400 views)
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RE: DataMotion for Volumes in 8.1? [In reply to]

The documentation is a little confusing. If the vFiler owns the volume,
then all mounts (volume or qtree) stay intact since VSM is used and
FSIDs and File Handles move. If the vFiler owns only the qtree then
vfiler migrate uses QSM and the volume FSID doesn't move so clients have
to remount. Most don't assign qtrees to vfilers so this isn't an issue.

Vfiler migrate doesn't have a volume limit, but doesn't have a guarantee
on the time it takes to failover. Data Motion for vFilers from the NMC
with the guaranteed 120 second migrate does have this limit (20 for
6000/6200, 8 for 3000/3100/3200/2200 controllers)

-----Original Message-----
From: toasters-bounces [at] teaparty
[mailto:toasters-bounces [at] teaparty] On Behalf Of Kennedy, Jeffrey
Sent: Thursday, May 03, 2012 3:07 PM
To: toasters [at] teaparty
Subject: RE: DataMotion for Volumes in 8.1?

I don't know about DataMotion but our team has tested vfiler migrate
between cluster partners and it works seemingly fine. It even worked
despite the documentation indicating it shouldn't, at least not for how
we're setup. We use qtrees exclusively for mounting and the
documentation indicated that clients mounting qtrees would need to
re-mount; this was not the case. Vfiler migrate caused the client to
hang and report NFS server not responding but once complete the client
operations continued without a re-mount and no hung mounts. A nice
surprise given the documentation.

Something else (besides the transparency of qtree mounts during a vfiler
migrate) that we've not found a definitive answer to is whether or not a
volume limit exists. At one point in the documentation it uses 20
volumes as an example of a DFM managed migration, but nothing that says
"the maximum volume count is.....". We've checked with support as well,
the answer is no known limit.
Has anyone done a transparent vfiler migrate of more than 20 volumes?

We'll be testing this in our lab but haven't gotten to it yet.

Jeff Kennedy
Qualcomm, Incorporated
QCT Engineering Compute
858-651-6592

-----Original Message-----
From: toasters-bounces [at] teaparty
[mailto:toasters-bounces [at] teaparty] On Behalf Of Borzenkov, Andrey
Sent: Wednesday, May 02, 2012 12:39 PM
To: Randy Rue; toasters [at] teaparty
Subject: RE: DataMotion for Volumes in 8.1?

There are two DataMotions today - DataMotion for Volumes and DataMotion
for vFilers. The former is supported between aggregates on the same
filer and for block protocols (FCP. iSCSI, FCoE) only. This is what "vol
move" does. The latter is between different filers only (I am not sure
if even two controllers in HA pair are supported) and supports NAS
protocol only (probably iSCSI too). To control it DFM (OnCommand
Provisioning and Data Protection) is required.

So I am not sure it can be done easily. If you have DFM server and one
more filer, moving via it could be the easiest thing :)

________________________________________
From: toasters-bounces [at] teaparty [toasters-bounces [at] teaparty] On
Behalf Of Randy Rue [rrue [at] fhcrc]
Sent: Wednesday, May 02, 2012 21:30
To: toasters [at] teaparty
Subject: DataMotion for Volumes in 8.1?

Hello All,

Running 8.1GA on a 3240 and trying to move two vfilers from one
aggregate to another (both are 64 bit aggrs). Ultimately I just need to
move the root and data volumes for these vfilers.

Not finding a wealth of examples on the "vol move" command, not
surprising as this is a pretty new feature.
http://www.netapp.com/us/communities/tech-ontap/tot-data-motion-1102.htm
l

NetApp's blurb says this can be done without interruption, but also
talks a lot about when to do the "cutover." They say the cutover can be
triggered manually or automatically. But I can't make the "vol move"
command do anything but return a usage blurb unless I include a "start"
switch.

Also, their website claims this can be done nondisruptively. But "vol
move start" keeps failing because I have CIFS and/or NFS running. In
fact, if I turn them both off it still complains that I have NFS exports
configured and that I need to remove them first.

Anyone have experience moving volumes from one aggr to another,
hopefully live?

Randy Rue
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