Sorry for revisiting this but I'm in a predicament now. Trying to backup the
NDMP device is a miserable failure and frankly just ugly. I honestly can't see
why anyone would use TSM to backup any NDMP devices except for maybe speed
issues.
We decided to mount all of the NFS shares locally on the TSM server and allow
them to be backed up that way but now the problem is that even with
resourceutilization set to 20, it still takes 18+ hours just to do an
incremental because there are millions and millions of files in all of those
NFS shares. So this isn't going to work either. I can try the proxy node
solution but frankly I'm skeptical about it also because of the tremendous
number of small files. Of course this is all for a mission critical application
so I have to come up with a workable solution and I'm running out of ideas.
Help!
Oh, that works just fine. Then you're backing up over NFS, no NDMP involved.
And TSM will not back up an NFS-mounted volume by default, so you won't get
multiple copies.
Put the virtualmountpoint names in the DOMAIN statement in dsm.sys of the
client you want to run the backups (or create dsmc incr commands that list the
sharenames, however you roll), fight through whatever permissions issues pop
up, and Bob's your uncle. You'll get incremental-only backups of those files.
What you won't know for a while, is how long it takes to noodle through the
filesystems across the NFS mount- depends on how many kazillion objects in the
directories.
If you list the names in the DOMAIN statement, you can add "RESOURCEUTILIZATION
10" to the dsm.sys and process 4 shares at once, if the directory noodling is
more time consuming than the actual data transfer, which it usually is if these
shares are made of a lot of small files.
If you can't get through them by running 4 at a time, I've solved that before
by setting up multiple proxy clients (using GRANT PROXYNODE), to get even more
parallel streams running, but with all the backups stored under 1 nodename so
that it's easy to find them at restore time.
W
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Dury, John C.
Sent: Friday, February 14, 2014 3:46 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] file system backups of a Dell NDMP Equallogic device
We are more concerned about file level backups than an image backup. Eventually
the NAS devices will be replicating using Equallogic replication once we get
some more storage but for now, we want to make sure that the files in the NFS
shares are correctly backed up but I really wanted to avoid backing up the same
NFS data to multiple TSM nodes since some of the NFS mount are shared amongst
several servers/nodes. My strategy is to pick one TSM node and make sure it has
NFS mounts for all of the NFS that live on the NAS and then just backup it up
as virtualmountpoint(s) so something like this
/NAS exists off of root on TSM node and is local
mount NFS1 as /NAS/NFS1
mount NFS2 as /NAS/NFS2
etc
put entry in dsm.sys virtualmountpoint /NAS
and then just let incrementals run normally.
All restores would need to be done on the NODE that can see all of the NFS
mounts.
Think that will work?
I agree with Wanda. Our strategy for our filers (BlueARC, Isilon) is to
backup at the file-level exclusively, using NFS. Modern TSM servers support
no-query restores well enough that we can get a restore of the latest data
very quickly (make sure you have plenty of CPU and memory, along with very
fast database disks). To perform the backups efficiently, you might want to
think about splitting your data up into separate nodes or filespaces,
backed up with independent schedules, so that you're not bottlenecked on a
single component.
As far as I can tell, NDMP was written by storage vendors to make one buy
more expensive storage, and more of it than one needs.
You don't have to use tape.
You can do NDMP backups via TCP/IP to your regular TSM storage pool hierarchy.
But AFAIK you still have to do it at the volume/share level that the NAS device
understands, I don't think you can do it at the root.
Using "virtualmountpoint" is for backing up incrementally at the *file* level
via NFS or CIFS mounts, not NDMP, so I'm not sure which way you are headed.
Question is, what are you doing this for?
NDMP is a stupid, simplistic protocol. You won't like what you have to do to
achieve an individual file restore. If you are trying to get DR capability to
rebuild your NDMP shares in case of an emergency, it makes sense. If you are
just trying to provide backup coverage to restore people's files like you would
from a file server, it may not.
If you want to do NDMP via TCP/IP instead of direct to tape, reply with your
TSM server platform and server level, and I'll send you back the page reference
in the manual you need...
W
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Dury, John C.
Sent: Thursday, February 13, 2014 2:11 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] file system backups of a Dell NDMP Equallogic device
We have two Dell NDMP storage devices and a TSM server at both sites. We'd like
to be able to root file level (image backups don't help much) backups (and
restores if necessary) of the entire NDMP device to the local TSM server. Can
someone point me in the right direction or tell me how they did it? NAS/NDMP is
pretty new to me and from what I have read so far, the documentation talks
about backing up directly to tape, which we don't have any more. All of our
storage is online.
What I was originally planning on doing, was creating all of the NFS shares on
one linux server, and backing them up as /virtualmountpoints. I'd like to setup
just one which points to the root of all the NFS systems on the NAS device but
I see no way to do that either.
Any help is appreciated.
Op 13 feb. 2014, om 20:11 heeft Dury, John C. <JDury AT DUQLIGHT DOT COM> het
volgende geschreven:
> We have two Dell NDMP storage devices and a TSM server at both sites.
> We'd like to be able to root file level (image backups don't help
> much) backups (and restores if necessary) of the entire NDMP device
> to the local TSM server. Can someone point me in the right direction
> or tell me how they did it? NAS/NDMP is pretty new to me and from what
> I have read so far, the documentation talks about backing up directly
> to tape, which we don't have any more. All of our storage is online.
>
> What I was originally planning on doing, was creating all of the NFS
> shares on one linux server, and backing them up as
> /virtualmountpoints. I'd like to setup just one which points to the
> root of all the NFS systems on the NAS device but I see no way to do that
> either.
> Any help is appreciated.
if supported by the Dell, NDMP to disk is even simpler than NDMP to tape...
just don't define any paths from the datamover to tape (which you don't have
any way)....
--
Met vriendelijke groeten/Kind Regards,
Remco Post
r.post AT plcs DOT nl
+31 6 248 21 622
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