toasters

toasters@lists.teaparty.net

2 participants
13529 discussions

Sudden CIFS performance degradation
by Dianna Mullet 07 Jun '01

07 Jun '01

We're running OnTap 5.3.6 on an F760, serving both NFS and CIFS. It ran fine since we upgraded to 5.3.6 around 10 months ago, until early this week, when we began experiencing severely degraded CIFS performance. In some cases, CIFS times out and the client experiences data loss. What should I be looking for? We had a similar problem with our other filer a few months ago, but never determined the cause; we ended up solving the problem by upgrading to OnTap 6. This time, I would like to determine the cause _before_ we upgrade, but time is of the essence. Help/tips appreciated. Thanks, Dianna

1 0

remove
by christian.witt＠philips.com 07 Jun '01

07 Jun '01

remove

1 0

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

07 Jun '01

In that case it doesn't sound like the app is trying to set Unix security. Yes, the filer maps the UID to a SID, but as described in the FAQ, you can't set Unix security in an NTFS qtree no matter what NT user you map to. Assuming you've unsuccessfully tried to use the security troubleshooter to diagnose this, open a case with Netapp and get them a packet trace, along with the exact permissions of the files in question and the "wcc -dvv" output. Alternatively, if it is a standard application, give them a full description of how to reproduce this. Mark -----Original Message----- From: Steven Boyer [mailto:Steven.Boyer@gd-wts-centcom.com] Sent: Wednesday, June 06, 2001 7:30 PM To: 'Steven.Boyer(a)GD-WTS-CENTCOM.COM'; toasters; Muhlestein, Mark Subject: RE: Unix applications accessing ntfs qtree But if I change the folder permissions to full control I can then save a file from a 3rd party Unix/Solaris application. Also doesn't the filer map a user's UID and GID to a SID. ---------- Original Message ---------------------------------- From: "Muhlestein, Mark" <mark.muhlestein(a)netapp.com> Date: Wed, 6 Jun 2001 17:52:58 -0700 >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 >-- > -- Steven N. Boyer UNIX/NT/NetApp Support HQUSCENTCOM General Dynamics --

1 0

RE: Unix applications accessing ntfs qtree
by Steven Boyer 07 Jun '01

07 Jun '01

But if I change the folder permissions to full control I can then save a file from a 3rd party Unix/Solaris application. Also doesnt the filer map a user's UID and GID to a SID. ---------- Original Message ---------------------------------- From: "Muhlestein, Mark" <mark.muhlestein(a)netapp.com> Date: Wed, 6 Jun 2001 17:52:58 -0700 >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 >-- > -- Steven N. Boyer UNIX/NT/NetApp Support HQUSCENTCOM General Dynamics --

1 0

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 --

1 0

add
by Puneet Gulati 07 Jun '01

07 Jun '01

1 0

Unix applications accessing ntfs qtree
by Steven Boyer 07 Jun '01

07 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 --

1 0

Moving data from one volume to another
by Robert.Sabo＠ecomm.bc.ca 07 Jun '01

07 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

3 2

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.

5 6

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.

3 2

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

toasters