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Re: Sharing files between NT and Unix
by Mark Muhlestein 17 Feb '99

17 Feb '99

Actually it depends on the application. If the Windows application has the file open exclusively, then you won't be able access it from NFS. But if it is open in a mode that allows readers, it will work. And some applications open a file, copy it to a temporary file, close the original file, operate on the copy, then rename it to the original name when you do a save. And byte range locking also comes into play with some applications. All these types of lock are supported in a multi-protocol manner on the filer. Mark Muhlestein -- mmm(a)netapp.com -----Original Message----- From: Tom Limoncelli <tal(a)research.bell-labs.com> To: Schepers, Jan <Jan.Schepers(a)nl.origin-it.com> Cc: 'toasters(a)mathworks.com' <toasters(a)mathworks.com> Date: Tuesday, February 16, 1999 7:32 PM Subject: Re: Sharing files between NT and Unix >"Schepers, Jan" wrote: >> "NetApps Filers can't share files between NT and Unix *simultaneously*." > >I do it every day! > >It should be noted that the exact same file can't be opened at the exact >same time (ie. you can't "cat" a file in unix at the exact moment >MS-Word is reading the file). This is because MS-Word locks the file! >So, if you find a product that WILl "cat" the file while MS-Word is >using it, it sounds like they aren't implementing any locking! Ouch! > >--tal >

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cont: Sharing files between NT and Unix
by Schepers, Jan 17 Feb '99

17 Feb '99

>Hello People, > >This was my question to you: >Apparently I have never understood the concept of an netapp filer, >but this is what an HP guy is trying to tell me: >"NetApps Filers can't share files between NT and Unix *simultaneously*." > >What could he have meant ? Thanks to all the numerous people that gave their reaction. I realized that dropping the question amongst equal tuned people would result in responses that line with my observations. Ergo, the place the get the answer is of course the HP sales-rep. I'll let you know when it comes to something beautiful :-) MNY THKS, Jan >

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Sharing files between NT and Unix
by Schepers, Jan 17 Feb '99

17 Feb '99

Hello People, Apparently I have never understood the concept of an netapp filer, but this is what an HP guy is trying to tell me: "NetApps Filers can't share files between NT and Unix *simultaneously*." What could he have meant ? cheers, Jan

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Question on 5.x
by Jaye Mathisen 17 Feb '99

17 Feb '99

I'm still running 4.3.4, going to upgrade to 5.x shortly. One question: On the volumes that can be created, can I set up some to have snapshots, and some that don't? Or is it only system-wide?

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Re: Netapp nfs over tcp
by Gordon Keegan 16 Feb '99

16 Feb '99

> On Fri, 12 Feb 1999, Gordon Keegan wrote: > > > > > Speaking of NFS over TCP, we'd also like to try turning nfs.tcp.enable > > on to do some testing. Does anyone know if this would affect current > > mounts if we just enable it at the filer command line with > > "options nfs.tcp.enable on", or can that be done? > > Your clients aren't currently mounting with tcp, you'll have to have > them umount the server and then remount after you've enabled it on > the server. So it is kind of a chore. > I probably didn't phrase the question as well as I should have. If I enable NFS over TCP, then mount a single host using TCP and do testing, will that stomp on the dozens of other clients that still have their UDP mounts? (there; hopefully that was better :) -- Gordon Keegan, M10-10 Phone: (508) 261-4696 Motorola ISG Fax: (508) 261-5757 20 Cabot Boulevard Mansfield, MA 02048 email: lgk011(a)dma.isg.mot.com

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Re: Sharing files between NT and Unix
by mds＠gbnet.net 16 Feb '99

16 Feb '99

On Tue 16 Feb, 1999, "Schepers, Jan" <Jan.Schepers(a)nl.origin-it.com> wrote: > Hello People, > > > Apparently I have never understood the concept of an netapp filer, > but this is what an HP guy is trying to tell me: > "NetApps Filers can't share files between NT and Unix *simultaneously*." Well as the above statment is totally, provably incorrect... > > What could he have meant ? ...he evidently meant 'I will lie outrageously to try to boost my company's chances of a sale'. So many companies' sales-forces resort to this that I find myself proposing a cull of salespeople - in the Canadian-baby-seal style, to preserve the viability of the rest of the species. > > cheers, You're most welcome. > > Jan > >-- End of excerpt from "Schepers, Jan"

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Re: Netapp nfs over tcp
by Daniel Quinlan 16 Feb '99

16 Feb '99

Actually, I have one question: is there any reason we wouldn't want to start using NFSv3/UDP for Solaris boxes on our switched LAN? - Dan

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Shared Snapshot directory
by Patrick.Day.B＠bayer.com 16 Feb '99

16 Feb '99

This is kinda long, so i appologize ahead of time... We are running OnTap version 5.2.1 on a 740. When we ordered the system we got an autoloader backup (powerstor L500). Unfortuantly, Ontap can't handle the loader to meet our needs. So, as a solution, we attached the device to an NT server running BackupExec 7.2. I was thinking that in order to get a good backup of the system i could share out the .snapshot/nightly.0 as shapc$. This would give me a look at the system from the the root directory. At first it appeared that this would work fine, the CIFS SHARE command shows the snapc$ share as always being mapped to the nightly.0 directory, even after the nightly.0 is changed to nightly.1. However, when i did a snap list command, it shows that the nightly.1 is "busy". When i do a backup, it backs up the OLD snapshot directory and when i open the directory, i confirm that it is the old data. It seems that the Netfiler remembers which directory is mapped regardless of the name. I have found that when i reboot, the share is recreated to the correct directory, but rebooting every night is not an option. I have also changed the saved nightly snapshots to 1. The system will not create a new snapshot because the old one is busy and of course, having only one nightly snapshot is not an option. Is there any way to get the netfiler to refresh the share automatically? ---or make it stupid and not remeber that today's nightly.1 is yesterday's nightly.0? Any input would be appreciated. --Patrick Day Sys. Admin Bayer Corporation

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Linux NFS over TCP
by Daniel Quinlan 16 Feb '99

16 Feb '99

FYI - with the current Linux release (version 2.2.1), NFS over TCP is now working (it went into 2.2.0-pre6). But, only NFS version 2. Anyone have an opinion on NFSv2 over TCP compared to NFSv2 over UDP? I seem to remember seeing some benchmark that showed it was better, but now I can only find benchmarks (like SPEC SFS 2.0) that show it has a faster response time, but not throughput. - Dan

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Tape Drives Question????
by Jason Middlebrooks 15 Feb '99

15 Feb '99

Will a Redwood Tape Drive work with a Netapp Filer. Has anybody tried this yet??? Jason Middlebrooks Systems Engineer Datalink Phone: 888-933-9327x260 2264 Northwest Parkway, Suite I Pager: 888-502-1625 Marietta, GA 30067 Fax: 770-933-9272

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