toasters

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13515 discussions

RE: Unix applications accessing ntfs qtree
by Muhlestein, Mark 07 Jun '01

07 Jun '01

See the security troubleshooter FAQ: http://now.netapp.com/NOW/knowledge/docs/olio/guides/53_troubleshooting/faq… "I tried to 'gunzip' (un-tar, check out, etc.) a file in an NTFS qtree and it failed! Why? "Any attempts to set UNIX security will fail in an NTFS qtree. Some UNIX applications fail to operate properly if they cannot set security. If you need to run such applications you must use a Mixed or UNIX qtree. In some cases Win32 versions of these commands are available (for example, with the cygwin tools or MKS Toolkit), which allows them to be run from CIFS clients in NTFS qtrees." Mark -----Original Message----- From: Steven Boyer [mailto:Steven.Boyer@GD-WTS-CENTCOM.COM] Sent: Wednesday, June 06, 2001 4:51 PM To: toasters Subject: Unix applications accessing ntfs qtree Our configuration is 760 running 6.1R1 When I try to save a file from a Unix/Solaris application to a ntfs qtree/directory I get access denied. Using an xterm I can access the directory as myself and rm, touch, vi any file, just cant do the same form a Solaris application ie...file manager and 3rd party Unix apps. I have checked the group perms, and wcc -s and -u also wcc-d and all seem ok. Has anyone seen this problem before? -- Steven N. Boyer UNIX/NT/NetApp Support HQUSCENTCOM General Dynamics --

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add
by Puneet Gulati 07 Jun '01

07 Jun '01

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Unix applications accessing ntfs qtree
by Steven Boyer 06 Jun '01

06 Jun '01

Our configuration is 760 running 6.1R1 When I try to save a file from a Unix/Solaris application to a ntfs qtree/directory I get access denied. Using an xterm I can access the directory as myself and rm, touch, vi any file, just cant do the same form a Solaris application ie...file manager and 3rd party Unix apps. I have checked the group perms, and wcc -s and -u also wcc-d and all seem ok. Has anyone seen this problem before? -- Steven N. Boyer UNIX/NT/NetApp Support HQUSCENTCOM General Dynamics --

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Moving data from one volume to another
by Robert.Sabo＠ecomm.bc.ca 06 Jun '01

06 Jun '01

Hello all, We have a F720 filer where the data from one volume needs to be copied to another volume in the same filer. From the previous discussions on this mailing list, it appears that NDMPcopy 'infinite incremental' feature is the solution which provides the shortest possible downtime. What I would like to ask more experienced NetApp admins is whether there are known caveats in issuing something like: jndmpcopy filer:/vol/vol1 filer:/vol/vol2 -sa root:<passwd> -da root:<passwd> -level i Data ONTAP version is 6.01R1, and there is ~ 43 GB of data that needs to be moved. Any feedback on positive/negative experiences with this procedure is highly appreciated. Robert

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Renaming a Qtree
by Dale Wolf 06 Jun '01

06 Jun '01

The web interface doesn't provide a Qtree rename option. Is there a way to rename a Qtree without having to create a new Qtree, copy the data, and deleting the old Qtree? I have been told this copy process is the only way to rename a Qtree.

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RE: SQL Database on Filer ??
by Tom "Mad Dog" Yergeau 06 Jun '01

06 Jun '01

We've typically seen performance increases when moving from local storage to the filer. What kind of pipe are you using? If you're using 100 Mbps Ethernet, you'll see a performance hit since that's at best 8 MB/sec network throughput, which is trivial compared to local attach. If you are using gigabit Ethernet you should see excellent performance. Also how many disks are you using? Just like with local storage, more spindles = better performance. Are you using a private (or at least dedicated) network connection for the SQL Server to filer connection? If you're sending SQL queries to the box on the same interface that is talking to the filer that could cause significant performance degradation. Finally are you using OLTP or OLAP databases with the filer? (i.e. random or sequential reads?) NetApp folks might disagree but I think WAFL is a bad thing to mix with OLAP if you're using snapshots. It's great, absolutely phenomenal for OLTP, but sequential reads are not a filer's strong point (that's why it's called write ANYWHERE file layout, not "Write In Order and Minimize Fragmentation File Layout"). (Please no flames on how WAFL minimizes fragmentation--if you're using snapshots and you change any data in a database, the new data will be written elsewhere than the original disk location, causing the head to jump around like mad during what should be sequential reads. A copy-on-write snapshot would be MUCH better in this scenario.) Tell us more about your configuration so we can try to figure out why you're seeing problems. Also try pinging your sales rep, NetApp has people dedicated to making SQL Server work well with filers and I'm sure you could get some pointers from them. MD -----Original Message----- From: Dale Wolf [mailto:wolfd@agcs.com] Sent: Tuesday, June 05, 2001 7:32 PM To: toasters(a)mathworks.com Subject: SQL Database on Filer ?? Has anyone placed a SQL database on a filer and seen a significant performance increase of 10% or more or a performance decrease of 10% or more? Our initial test of a source change management application using a SQL database on our filer showed a significant decrease in performance to the tune of 2-3 times slower than a local storage array. We understand ours wasn't an apples to apples comparison but we weren't expecting the difference to be this great. Has anyone else experienced a similar story where they have seen negative/positive results they would like to share? Our filer is a model F840.

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Changing UIDs on LOTS of files
by Tom "Mad Dog" Yergeau 06 Jun '01

06 Jun '01

You might remember my bringing up a lot of questions about dealing with huge numbers of inodes to support an application we use. Well, now that application has another interesting need. They are starting to use NIS on a bunch of the application servers and so have the change the UIDs on MILLIONS of files and directories on our F840. Obviously the usual methods (chmod, chgrp) are exceedingly slow for something like this.. we could be at it for weeks. Can anyone suggest a method to change the uid and gid on massive quantities of files/directories more quickly? Thanks! Tom

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list delays
by fubar＠pir.net 06 Jun '01

06 Jun '01

People may have noticed some rather lengthy delays on the mailing list. The MathWorks recently deployed a virus scanning solution between their real mail server and The Rest of The World. This seems to be slowing things down rather a lot; hopefully, this won't last too long, but I'll try to keep everyone up to date... K. owner-toasters

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SQL Database on Filer ??
by Dale Wolf 05 Jun '01

05 Jun '01

Has anyone placed a SQL database on a filer and seen a significant performance increase of 10% or more or a performance decrease of 10% or more? Our initial test of a source change management application using a SQL database on our filer showed a significant decrease in performance to the tune of 2-3 times slower than a local storage array. We understand ours wasn't an apples to apples comparison but we weren't expecting the difference to be this great. Has anyone else experienced a similar story where they have seen negative/positive results they would like to share? Our filer is a model F840.

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RE: Renaming a Qtree
by Fox, Adam 05 Jun '01

05 Jun '01

You can rename a qtree by simply rename the top level directory. So if you're qtree is /vol/vol0/mytree. >From an NFS or CIFS client, rename that mytree directory to something else. Just watch your /etc/exports, CIFS share points, and your /etc/quotas file since you've changed something underneath them. But you should be able to avoid moving data from one tree to another. -- Adam Fox NetApp Professional Services, NC adamfox(a)netapp.com > -----Original Message----- > From: Dale Wolf [mailto:wolfd@agcs.com] > Sent: Tuesday, June 05, 2001 4:15 PM > To: toasters(a)mathworks.com > Subject: Renaming a Qtree > > > The web interface doesn't provide a Qtree rename option. Is > there a way > to rename a Qtree > without having to create a new Qtree, copy the data, and deleting the > old Qtree? I have been told this copy process is the only > way to rename > a Qtree. > >

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