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13531 discussions

A-SIS (NetApp De-Duplication)
by Peter W. Osel 01 Aug '07

01 Aug '07

Hello *, we are in the process of consolidating several NetApp filers and NearStore systems onto a single FAS30x0HA system. The system's main function is to serve primary data (part from FCAL disks, part from SATA disks), it's secondary function is to act as the NearStore system for a second site, storing the copy of the other site's data on SATA disks. Now we would like to try A-SIS to reduce the required physical storage. It looks as if in order to add A-SIS (a_sis license), I also need to install the NearStore license. Now my concern is, that by giving the system a NearStore personality I might impact the system's primary role - serving primary storage data to users. Has anyone experience with how a system changes when the NearStore licenses is enabled? Any negative impact for serving data to users? Is the NearStore personality activated by installing the nearstore license, or could we install the nearstore and a_sis license, but keep the nearstore personality deactivated? For data that we volume SnapMirror, would we need an A-SIS license on both sides - source and target system? Will the volume SnapMirror transfer less data (assuming that A-SIS de-dupe of data saved some of the required data blocks)? yes?!) Any other experience (good or bad) or concerns when using A-SIS? Any reason to not use it on all (home directory type data) volumes? Any limitation encountered? Any experience how much savings can be achieved (e.g. for home directories volumes, volume storing tons of application software packages)? Cheers --pwo -- Peter W. Osel eMail: pwo(a)Qimonda.COM Principal Development Systems Phone: +1.919.677.6333 Qimonda North America Corp. Cell : +1.408.348.6735 3000 CentreGreen Way eFax : +1.804.952.3905 Cary, NC 27513-5760, USA www : http://pwo.de/

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Re: A-SIS (NetApp De-Duplication)
by Reinoud Reynders 28 Jul '07

28 Jul '07

Hi Roger, Also a posible setup: the source is on a regular FAS system without nearstore personality and asis, but for DR you use qtree snapmirror to a nearstore. Your can turn on asis only on the destination. . You don't save space on the source, but you save a lot on the destination site. Greetings, Reinoud ----- Original Message ----- From: owner-toasters(a)mathworks.com <owner-toasters(a)mathworks.com> To: Sels Roger <roger.sels(a)uptime.be> Cc: toasters(a)mathworks.com <toasters(a)mathworks.com> Sent: Sat Jul 28 12:14:38 2007 Subject: Re: A-SIS (NetApp De-Duplication) On Jul 28, 2007, at 2:17 AM, Sels Roger wrote: > > Does this mean that the amount of replicated data is also reduced when > you SM a A-SIS source volume to a filer running A-SIS as well? > I hope that you mean this, because that would be great ;-) Yes -- that's what he means! When you do a VSM of a volume with A-SIS enabled, you get corresponding bandwidth savings as the volume is transferred in its deduplicated state. -- Michael Barrow michael at michaelbarrow dot name

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RE: A-SIS (NetApp De-Duplication)
by Sels Roger 28 Jul '07

28 Jul '07

Hi Vaugh, << In order to replicate de-duplicated data one will require A-SIS licenses on both the sopurce and destination FAS systems. VSM replication is my personal preference. >> Does this mean that the amount of replicated data is also reduced when you SM a A-SIS source volume to a filer running A-SIS as well? I hope that you mean this, because that would be great ;-) Roger -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of M. Vaughn Stewart Sent: za 28 jul 07 1:13 To: Peter W. Osel Cc: toasters(a)mathworks.com Subject: Re: A-SIS (NetApp De-Duplication) Peter, Hello and how are you my friend? The enabling of the Nearstore personality does not reduce the performance of a system as long as your maintain the number of replication streams (SnapMirror / SnapVault) to the non Nearstore limits for that platform. You can reference NOW for the limits. In order to replicate de-duplicated data one will require A-SIS licenses on both the sopurce and destination FAS systems. VSM replication is my personal preference. Vaughn Peter W. Osel wrote: > Hello *, > > we are in the process of consolidating several NetApp filers and > NearStore systems onto a single FAS30x0HA system. The system's main > function is to serve primary data (part from FCAL disks, part from > SATA disks), it's secondary function is to act as the NearStore system > for a second site, storing the copy of the other site's data on SATA disks. > > Now we would like to try A-SIS to reduce the required physical > storage. > > It looks as if in order to add A-SIS (a_sis license), I also need to > install the NearStore license. Now my concern is, that by giving the > system a NearStore personality I might impact the system's primary > role > - serving primary storage data to users. > > Has anyone experience with how a system changes when the NearStore > licenses is enabled? Any negative impact for serving data to users? > > Is the NearStore personality activated by installing the nearstore > license, or could we install the nearstore and a_sis license, but keep > the nearstore personality deactivated? > > > For data that we volume SnapMirror, would we need an A-SIS license on > both sides - source and target system? > > Will the volume SnapMirror transfer less data (assuming that A-SIS > de-dupe of data saved some of the required data blocks)? > yes?!) > > Any other experience (good or bad) or concerns when using A-SIS? > > Any reason to not use it on all (home directory type data) volumes? > > Any limitation encountered? > > Any experience how much savings can be achieved (e.g. for home > directories volumes, volume storing tons of application software > packages)? > > > Cheers > --pwo > > > -- > Peter W. Osel eMail: pwo(a)Qimonda.COM > Principal Development Systems Phone: +1.919.677.6333 > Qimonda North America Corp. Cell : +1.408.348.6735 > 3000 CentreGreen Way eFax : +1.804.952.3905 > Cary, NC 27513-5760, USA www : http://pwo.de/ > >

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How to reinstate "quota logmsg" settings after a reboot
by Chris Thompson 28 Jul '07

28 Jul '07

ONTAP 7.1.2 (and earlier versions) doesn't preserve "quota logmsg" settings over a reboot. There's a bug recorded for this (168726) at NOW, but it's only fixed in various 7.2.x releases, which I can't go to because I am stuck on an F8xx series filer :-( I tried putting an appropriate "quota logmsg" command at the end of /etc/rc (after "savecore"), but this didn't work for some reason. There's nothing in /etc/messages or /etc/log/auditlog that indicates it even tried to obey it. Any ideas? -- Chris Thompson Email: cet1(a)cam.ac.uk

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RE: Accessing snapmirrored (read only) LUN from Windows?
by Learmonth, Peter 27 Jul '07

27 Jul '07

Hi Steven I don't think Windows can mount NTFS read-only. You need to either break the mirror or FlexClone the dest vol. If using QSM, a LUN clone might work, but I haven't tried it. If you FlexClone, you should create a separate snapshot on the source to use as the baseline. If you use one of the SnapMirror snapshots, it could break SnapMirror (or so I've seen - others have said it depends on which SM snap you use). With vol SM, the dest is read-only which is why you put the snap on the source and let it replicate over. Share and Enjoy! Peter ... Sent from one of those phone+email doohicky things... I reserve the right to be wrong. -----Original Message----- From: Stephen C. Losen [mailto:scl@sasha.acc.virginia.edu] Sent: Friday, July 27, 2007 06:42 AM Pacific Standard Time To: toasters(a)mathworks.com Subject: Accessing snapmirrored (read only) LUN from Windows? We are working on a project that is housed in two separate buildings for disaster recovery. In each building we have a Windows server, a FAS270 filer and a FC SAN switch. The switches are not directly connected to each other, but we have long fibre runs so that each Windows server is connected to both switches. Each filer is connected to just its local FC switch. (This is a limitation of the FAS270, which has only one FC SAN port.) One filer is primary and the other is backup. On the primary filer I have a large volume containing a large LUN and this volume is being snapmirrored (synchronous) to the backup filer over ethernet. Both Windows servers can "see" both LUNs. We are using Windows clustering so that if the primary Windows server fails, the backup server will take over, using the primary LUN. If the primary netapp (or switch) fails, then we will need to manually intervene to cut over to the backup filer and LUN. So here is my question (at last). Is it possible to access both the primary LUN and the read only backup LUN on a Windows server? Windows seems to be confused by the read only LUN and I am seeing errors on the backup filer saying that Windows is trying to write to the LUN. I'm not a Windows guy, but is there any way to look at the files on the read only LUN from Windows? This isn't necessary for normal operations, I'm just curious. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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Accessing snapmirrored (read only) LUN from Windows?
by Stephen C. Losen 27 Jul '07

27 Jul '07

We are working on a project that is housed in two separate buildings for disaster recovery. In each building we have a Windows server, a FAS270 filer and a FC SAN switch. The switches are not directly connected to each other, but we have long fibre runs so that each Windows server is connected to both switches. Each filer is connected to just its local FC switch. (This is a limitation of the FAS270, which has only one FC SAN port.) One filer is primary and the other is backup. On the primary filer I have a large volume containing a large LUN and this volume is being snapmirrored (synchronous) to the backup filer over ethernet. Both Windows servers can "see" both LUNs. We are using Windows clustering so that if the primary Windows server fails, the backup server will take over, using the primary LUN. If the primary netapp (or switch) fails, then we will need to manually intervene to cut over to the backup filer and LUN. So here is my question (at last). Is it possible to access both the primary LUN and the read only backup LUN on a Windows server? Windows seems to be confused by the read only LUN and I am seeing errors on the backup filer saying that Windows is trying to write to the LUN. I'm not a Windows guy, but is there any way to look at the files on the read only LUN from Windows? This isn't necessary for normal operations, I'm just curious. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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CIFS shares presentation to users
by Paul Letta 27 Jul '07

27 Jul '07

Hello, We we getting ready to consolidate several older filers onto a single FAS3040. Each of these older filers had several CIFS shares exposed. My users are used to going to the Run box in windows and typing \\filerA to get filersA's shares and \\filerB to get filer B's shares and so on. But now there is just \\Newfiler. This produces a list of all the CIFS shares that used to be on several different filers. Is there a way to group several cifs shares together and present them in a folder, or another share ? I would like to be able to go to \\NewFiler, and get a window that has a few folders, each of which holds several shares. I don't think this can be done, but I thought I would ask here anyways. Thanks, Paul

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Snapshot delete
by Steffen Kammerer 26 Jul '07

26 Jul '07

Hi Toasters List, we create manually snapshots to make backups if we deploy new software releases. Now I want to delete automatically all snapshots older than 6 hours, because of special restrictions. I read the manual about snap autodelete but I cant find an option. Has anyone experience in those things? Greetings Steffen

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RE: usermapping UNIX <-> NT
by Willeke, Jochen 26 Jul '07

26 Jul '07

Hi, we have a directory service which is our AD, but only for windows. But maybe this is not enough.... Do we need a special one for the unix side, too?? Rgds Jochen -----Original Message----- From: tmac [mailto:tmacmd@gmail.com] Sent: Tuesday, July 24, 2007 3:13 PM To: Willeke, Jochen Subject: Re: usermapping UNIX <-> NT IF you are not using a name service (like LDAP or NIS), then yes it is expected. Every CIFS SID must map to some UNIX UID. If you look at your password file, you probably have at least the "pcuser" in there, which may even be 65534. From your original post, I would say this is the case. Either install a name service, or create a password file: username::UID:GID::: That is all you need unless you want to get fancy with FTP or something. You may need to terminate current CIFS sessions to force them to re-authenticate properly. On 7/24/07, Willeke, Jochen <Jochen.Willeke(a)wincor-nixdorf.com> wrote: > Hi colleagues, > > i found out something strange... > > After setting wafl.default_nt_user "" > i ended up, that no User from Windows was able to access shares, because > it seems that the filer maps every user from our Domain to "pcuser". > > I was never aware of that fact....Is this correct behaviour?? > > Rgds > > Jochen > > -----Original Message----- > From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] > On Behalf Of Willeke, Jochen > Sent: Monday, July 23, 2007 3:17 PM > To: toasters(a)mathworks.com > Subject: FW: usermapping UNIX <-> NT > > Hi, > > wafl.default_nt_user > > was it.... > > No set it to wafl.default_nt_user "" > > and it is working lika a charm :D > > Rgds and thanks to all > > Jochen > > -----Original Message----- > From: Parisi, Justin [mailto:Justin.Parisi@netapp.com] > Sent: Monday, July 23, 2007 3:02 PM > To: Willeke, Jochen > Subject: RE: usermapping UNIX <-> NT > > Check your options for mappings from PC users - options > cifs.guest_account and options wafl.default_nt_user - you may have > nobody as an entry in one of those options... > > -----Original Message----- > From: Willeke, Jochen [mailto:Jochen.Willeke@wincor-nixdorf.com] > Sent: Monday, July 23, 2007 7:02 AM > To: toasters(a)mathworks.com > Subject: usermapping UNIX <-> NT > > Hi toasters, > > we currently have a strange problem. We have setup a volume with mixed > security style and exports and CIFS shares on it. I have made an entry > in the usermap.cfg like this > > Domain\jochen.willeke == utest > > In filers local passwd utest has UID 1234 (only for a test). > Mapping checked with wcc seems to work well, but when i create a folder > from the windows side with my user jochen.willeke and then check with > "ls -n" from a unix host, it shows me the UID and group ID from nobody > (65534). > > Has anybody an idea where my mistake is?? > > Best Regards and thanks in advance > > Jochen > > > -- --tmac RedHat Certified Engineer

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RE: NetApp Thin Provisioning and VMware ESX
by Kenneth Heal 26 Jul '07

26 Jul '07

HiDon't know if you have seen http://www.netapp.com/library/tr/3428.pdf. This talks a bit more about ESX and Netapp together.Reading this description it sounds like there may be old snapshots and/or space reservations at play here. In the case of the former snapshot auto-deletion may prove to be a help.Could you check this and grab us a df output?I haven't tried this combo, so there may be someone out there who has already done this and could say more.regardsKenneth HealStorage ConsultantSenet Eindhoven bvSubject: NetApp Thin Provisioning and VMware ESXDate: Tue, 17 Jul 2007 22:54:03 +0200From: drenthjd(a)wxs.nlTo: toasters(a)mathworks.com Hi Toasters, We created something of an interesting dilemma for ourselves. The original problem was the lack of a means to extend existing VMFS LUNs through ESX without an extent and or downtime. The idea was to use NetApp thin provisioning as a way to offer up a large disk to ESX without the need to back that up with real disks, as a way to monitor real disk usage we created a hard volume and monitor with df the real use of disk against a hard limit (being the volume). So a 1 TB Lun (thin) was created inside a 200 GB (hard) volume, subsequently we wanted to keep track of ESX 3's usage through controlling the size of the VMDK files we would create. As this environment hosts desktops and was a testing ground at first there were a whole bunch of VMDK being created and destroyed. The situation we end up with is VMware thinking it has 60 GB in use of a 1 TB LUN while NetApp reports 180 GB in use of 200 GB (being the hard limit at this time). Basically the question becomes whether we can force ESX to actually reuse any of the [netapp in use] - [real use according to ESX] = 130 GB of space. Probably we need to clean up and start over with a new clean LUN, which we could then either hard provision and forget about thin provisioning altogether, because in our scenario it is no help. A broader question becomes were we went wrong? Our situation seems to suggest that we waste a whole lot of disk space - which VMware wont reuse on its own, and which NetApp can't touch (how would it know it was now freed up space) In that sense thin provisioning is just a space waster in an environment with VMDK's being destroyed and recreated from scratch. Of course we could always go flexcloning... but that would force netapp world on a whole lot of admins. Best regards, Delorean _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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