toasters March 2006

toasters@lists.teaparty.net

156 participants
215 discussions

RE: wafl scan reallocate
by Glenn Walker 08 Mar '06

08 Mar '06

Lori, It's an index value based on how full the volume is. It's a bit arbitrary as far as values go, but the gist of the output is that you've got less fragmentation than the scanner expected you to have. Glenn -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Lori Barfield Sent: Wednesday, March 08, 2006 12:02 AM To: toasters(a)mathworks.com Subject: Re: wafl scan reallocate On 3/7/06, Glenn Walker <ggwalker(a)mindspring.com> wrote: > Looks like you are doing pretty good... > > Keep in mind, it's an average, so for specific data sets in the volume > it may be much higher (or lower). Workload measurements (statit during > specific operations) can tell you much more sometimes. > > Filling the volume is typically a bad idea (tm) as WAFL will spend more > time finding free space to write. If this is a flexvol and the aggr has > tons of space available, this is not a concern. > > 7.X has great improvements on fixing fragmentation and preventative > measures to keep it from becoming an issue. > > Remember: Fragmentation is NORMAL with any filesystem and isn't > necessarily a problem. What fragmentation _does_ do is introduce > latencies that can be detrimental to responsiveness... sometimes this > can be felt (ie, it's a problem), sometimes it cannot be felt... thanks, glenn. can you tell us what this means? Based on your free space, 6.53 is expected. ...lori

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CIFS Writes delayed
by Bret Jacobson 08 Mar '06

08 Mar '06

Running a 3050c (7.0.4), and for about an hour we had several instances where generic accounts could not write to specified CIFS shares. They could map them and read them but no writes. The issue then resolved itself. I didn't see any errors on the filers (cifs overdue requests or dc issues), however, given the scope of the problem and the mysterious fix leads me to belive it was an AD issue. I just wanted throw this out there and see if anyone else had run into this. Thx. -- View this message in context: http://www.nabble.com/CIFS-Writes-delayed-t1240082.html#a3281887 Sent from the Network Appliance - Toasters forum at Nabble.com.

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RE: CIFS Writes delayed
by Callaway, Michael 08 Mar '06

08 Mar '06

Did you have a drive fail during that time period? Thanks, Michael NTTA/IT http://www.ntta.org 214.461.2033 -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Bret Jacobson Sent: Tuesday, March 07, 2006 8:52 AM To: toasters(a)mathworks.com Subject: CIFS Writes delayed Running a 3050c (7.0.4), and for about an hour we had several instances where generic accounts could not write to specified CIFS shares. They could map them and read them but no writes. The issue then resolved itself. I didn't see any errors on the filers (cifs overdue requests or dc issues), however, given the scope of the problem and the mysterious fix leads me to belive it was an AD issue. I just wanted throw this out there and see if anyone else had run into this. Thx. -- View this message in context: http://www.nabble.com/CIFS-Writes-delayed-t1240082.html#a3281887 Sent from the Network Appliance - Toasters forum at Nabble.com.

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RE: Fwd: rsh times out after 5 min
by Lai, Derek 08 Mar '06

08 Mar '06

So we can use SSH with DOT 7.x without needing any additional licensing? Derek -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Tim McCarthy Sent: Tuesday, March 07, 2006 11:53 AM To: Sheldon Mustard Cc: toasters(a)mathworks.com Subject: Re: Fwd: rsh times out after 5 min Nope. Sorry. Prior to 7.0, NetApp issued a pass-through license fee from RSA fo ruse of the SSH implementation. In 7.0, that module was completely rewritten in C code (which makes it significantly faster than the JAVA code in pre-7 releases). It was developed from the OpenSSH stuff which is free and requires no pass through license fee. If you *really* want SSH, you should look at upgrading to 7.x if you can. (i.e. out of luck with a 700 series or F85) Sheldon Mustard wrote: > On 3/7/06, Tim McCarthy <tmacmd(a)gmail.com> wrote: >> Have you tried ssh? I use it exclusively. It is easy to setup to use >> without passwords.... > > Does ssh work in 6.5 without an additional license? I have been able > to get ssl working but but not ssh ... any ideas? When I tell it to > enable ssh2 it says "SecureAdmin is not installed", do I need to > install some binaries from the now site. > > SJM > > -- > Sheldon Mustard > smustard(a)gmail.com > "There will be no order, only chaos." - Pi (1998) > -- > >

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RE: iSCSI on Windows Question
by Lai, Derek 08 Mar '06

08 Mar '06

We were also running without SnapDrive for a long time. About 2 years. I just recently upgraded to use SnapDrive. If you don't need to do snapshot on the fly, you can do without SnapDrive. However, you need to shutdown your server before you take a snapshot and growing luns take a long time since you need to use something like diskpart yourself. SnapDrive makes all these tasks a breeze. It also is pretty low cost. Derek -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Joseph King Sent: Monday, March 06, 2006 2:11 PM To: toasters(a)mathworks.com Subject: iSCSI on Windows Question Is anyone running iSCSI on windows without SnapDrive or is it just a big pain w/o SnapDrive? How does SnapDrive for Windows make your life easier, is it work the license? Joe

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RE: rsh times out after 5 min
by Holland, William L 08 Mar '06

08 Mar '06

No NIDS involved. This network is not visibleto our production network. -----Original Message----- From: Glenn Dekhayser [mailto:gdekhayser@voyantinc.com] Sent: Wednesday, March 08, 2006 10:45 AM To: Holland, William L; toasters(a)mathworks.com Subject: RE: rsh times out after 5 min ....Most likely because they are using Snort NIDS to log all access to the filer (government work). Understandable. If you used SSH, they couldn't see what you were doing! Of course, unless you used the serial console.... :-) Glenn -----Original Message----- In our environment the "owners" of the Intranet expressly forbid using SSH on our filers. I am also expressly forbidden to use any form of shareware or freeware and I do not wish to purchase a software package for this one task. -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:Mike_Sphar@bmc.com] Sent: Tuesday, March 07, 2006 3:27 PM To: toasters(a)mathworks.com Subject: RE: rsh times out after 5 min I agree totally. I don't mean to lean on anyone to change anything, just wanted to point out there are decent free ssh utilities for windows. (I use SecureCRT personally as I've used it for a long time, but it's not free.) -- Michael W. Sphar - IS&T - Lead Systems Administrator SMBU Engineering Support Services, BMC Software -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Chris Thompson Sent: Tuesday, March 07, 2006 1:35 PM To: toasters(a)mathworks.com Subject: Re: rsh times out after 5 min Mike Sphar writes > There are free/open-source ssh utilities for windows, like putty. Yes, yes, but ... It seems quite inappropriate to lean on William to convert from rsh to ssh until we know what the cause of his 5-minute cutoff is. For all we know, it will apply just as much to ssh as to rsh. If it's an "idle"-TCP-connection detector somewhere, it probably will. -- Chris Thompson Email: cet1(a)cam.ac.uk

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RE: rsh times out after 5 min
by Holland, William L 08 Mar '06

08 Mar '06

Windows 2000 Server with SP4. I started an rsh .... sysstat 1 and it ran for over 10 min before I manually terminated. So, it appears to be only when doing ndmpcopy via rsh. Something to do with the way ndmpcopy sends status info back every 5 min? Possibly resetting the stdout? OnTap 7.0.3 on the R200 I am rsh'ing to. Absolutely certain there is no firewall... built this network myself. It is a one switch network dedicated to backing up all our systems to an R200 using SnapVault and Syncsort's Open System Snapvault. -----Original Message----- From: Neil Stichbury [mailto:Neil.Stichbury@gen-i.co.nz] Sent: Tuesday, March 07, 2006 4:49 PM To: Holland, William L Subject: RE: rsh times out after 5 min What Windows client ? If you perform other rsh activity between this box and the Filer do you still get a connection reset or is it only when using ndmpcopy? What is the DOT version? Absolutely certain the path is not via a Firewall?(ie tracert works with no hops?) -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Holland, William L Sent: Wednesday, 8 March 2006 4:58 a.m. To: 'toasters(a)mathworks.com' Subject: rsh times out after 5 min I am trying to perform an ndmpcopy operation using rsh from a Windows client. I am able to initiate the ndmpcopy fine and transfer actually starts. However, after EXACTLY 5 minutes, the rsh times out with a "connection reset by peer" message. Anyone know of any way to get around this? This communication, including any attachments, is confidential. If you are not the intended recipient, you should not read it - please contact me immediately, destroy it, and do not copy or use any part of this communication or disclose anything about it. Thank you. Please note that this communication does not designate an information system for the purposes of the Electronic Transactions Act 2002.

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RE: rsh times out after 5 min
by Holland, William L 08 Mar '06

08 Mar '06

In our environment the "owners" of the Intranet expressly forbid using SSH on our filers. I am also expressly forbidden to use any form of shareware or freeware and I do not wish to purchase a software package for this one task. -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:Mike_Sphar@bmc.com] Sent: Tuesday, March 07, 2006 3:27 PM To: toasters(a)mathworks.com Subject: RE: rsh times out after 5 min I agree totally. I don't mean to lean on anyone to change anything, just wanted to point out there are decent free ssh utilities for windows. (I use SecureCRT personally as I've used it for a long time, but it's not free.) -- Michael W. Sphar - IS&T - Lead Systems Administrator SMBU Engineering Support Services, BMC Software -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Chris Thompson Sent: Tuesday, March 07, 2006 1:35 PM To: toasters(a)mathworks.com Subject: Re: rsh times out after 5 min Mike Sphar writes > There are free/open-source ssh utilities for windows, like putty. Yes, yes, but ... It seems quite inappropriate to lean on William to convert from rsh to ssh until we know what the cause of his 5-minute cutoff is. For all we know, it will apply just as much to ssh as to rsh. If it's an "idle"-TCP-connection detector somewhere, it probably will. -- Chris Thompson Email: cet1(a)cam.ac.uk

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by Habib Tijan 08 Mar '06

08 Mar '06

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RE: wafl scan reallocate
by Glenn Walker 08 Mar '06

08 Mar '06

I agree with Herbert's comments that it works exceptionally well in 7.x! Be warned, if you reallocate the source, the SM updates are going to be large and take a long time (potentially, depending on how much data is shifted around). As for measure_layout: it has always been my experience that this is something good to look at, but not the rosetta stone for fragmentation... it is an average of all the blocks on the volume and how fragmented they are. What I've always looked at to determine fragmentation is statit output (from perfstat) as it drills down a bit more to what the disks are actually doing. That by itself is also sometimes misleading, however... I'm sure NetApp support will review both to come up with a more accurate prediction. Glenn -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Herbert Langenbach Sent: Tuesday, February 21, 2006 4:26 AM To: philip.boyle(a)eircom.net; toasters(a)mathworks.com Subject: RE: wafl scan reallocate Philip, a wafl scan reallocate is just a defragmentation. Did NetApp ask you to run a wafl scan measure_layout? What was the result? BTW, I do not remember any improvement with reallocate in ONTAP 6.x It moves blocks around and comes back with pretty much the same fragmentation as it was before. It really works in 7.x However, to rule out fragmentation you need the measure_layout value. Herbert -----Original Message----- From: Philip Boyle [mailto:philip.boyle@eircom.net] Sent: Tuesday, February 21, 2006 9:06 AM To: toasters(a)mathworks.com Subject: wafl scan reallocate Hi guys, I am seeing increased cpu on a filer. It appears to jump when the filer kicks off a number of snapmirrors. I've updated the threshold so that the mirroring runs a little more frequent and this appears to have reduced the high cpu issue. Note, I'm only running approximately 4 snap mirror threads on a clustered environment so I'm not hitting any mirroring thread limitations. This increase in cpu is unexpected as the filer is running around 50% less snapmirror threads and 40% less volumes from 6 months ago. so if anything I should see a drop in cpu activity. Support are advising me to run a 'wafl scan reallocate' as one volume is close to 80% full. I'm not convinced and reluctant to kick off wafl commands. For your information, I'm running 6.5.3P4 on a 940C cluster. Has anyone else had similar issues or have ran 'wafl scan reallocate'. Any recommendations for debugging? I've passed on the relevant 'sysstat' data for a 24hr period to Netapp Support. Regards, Philip --

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toasters March 2006