toasters September 2000

toasters@lists.teaparty.net

122 participants
161 discussions

RE: SNMP counter - integer overflow?
by Hackworth, Brian 14 Sep '00

14 Sep '00

: Of course: I don't see this as the "perfect" solution. I : would love if : netapp would do a fix for this. (if one is possible?) ONTAP 6.0 addresses this problem by (a) storing NFS operation counts internally in 64-bit containers (b) adding two new variables (of type Counter, rather than the incorrect INTEGER type) to report the low-order 32 bits and the high-order 32 bits. See miscHighNfsOps and miscLowNfsOps in version 1.4 of the netapp.mib. SNMP client software is normally prepared for Counter variables to wrap around. Client software that really cares how many times the counter has wrapped around can figure that out from the miscHighNfsOps. - Brian -- Brian Hackworth hackwort(a)netapp.com Network Appliance 408.822.6654 Sunnyvale, CA USA

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Backup software comparison
by Leigh David Heyman 14 Sep '00

14 Sep '00

Hello, We are currently testing automated backup software products, for backup up our servers and NetApp filers via NDMP. We've narrowed our seach down to two products: Quick Restore from Workstation Solutions, and Backup Express from Syncsort. I'm wondering if anyone on this list has experience with either or both of these products and if so, would you care to share your opinions or experiences with them? Any input would be greatly appreciated. Thanks, -Leigh ===================================================================== Leigh Heyman, GCIA Artificial Intelligence Lab Systems Administrator Massachusetts Institute of Technology leigh(a)ai.mit.edu 617-253-1729

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NOW enhancement
by Todd C. Merrill 13 Sep '00

13 Sep '00

When I get email notification of a change in status of a support call, it looks something like: CASE #: xxxxxx.00000 SERIAL #: yyyyy Site: "mathworks" City: Natick Status: Closed Symptom: "CPU ECC ERROR; SYS ECC ERROR; DIMM=J27" Internal action associated with the case has been completed Actions due to be performed: --------------------------------------- Action: RMA Status: OPEN Due Date: Jul 6 2000 For further information, please view your case at "http://now.netapp.com/Self-Service/Forms/frmCaseView.asp?CaseId=xxxxxx.00000" If you reply to this mail please do not change the Subject line. Is it possible to include in this email the *changes* to the case? It is an annoyance to go to a web browser, login to the NOW site, and check. Seems like just enclosing the changed actions would be straightforward, and I can decide if I need to login to NOW to add comments or not. Thanks for listening. Until next time... The Mathworks, Inc. 508-647-7000 x7792 3 Apple Hill Drive, Natick, MA 01760-2098 508-647-7001 FAX tmerrill(a)mathworks.com http://www.mathworks.com ---

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RE: 2 volumes or 1
by Mohler, Anissa 13 Sep '00

13 Sep '00

Bruce is right... the quote as outlined in the e-mail below is incorrect. The exact quote from the Advanced Administration and Troubleshooting "202" Student Guide Dated April 2000 (Page 8 of the performance tuning section) is: "There is an approximate 10% decrease in write performance when the filer attempts to write to a RAID group spanning two adapters. This is due to inherent limitations in the PCI bus." Page 41 of the Performance Tuning Section does not specifically say WRITE performance but page 47 does. I'm sure this issue will be addressed in the next version of the course. Please note... the statement above may no longer apply to the F840 filer (or later filers) or later releases of Data ONTAP. That statement addresses a specific limitation of the PCI bus on Pre-F800 series filers. As always .... YMMV. -----Original Message----- From: Bruce Sterling Woodcock [mailto:sirbruce@ix.netcom.com] Sent: Tuesday, September 12, 2000 4:14 PM To: Todd C. Merrill; Chris Lamb Cc: toasters(a)mathworks.com Subject: Re: 2 volumes or 1 ----- Original Message ----- From: "Todd C. Merrill" <tmerrill(a)mathworks.com> To: "Chris Lamb" <skeezics(a)measurecast.com> Cc: <toasters(a)mathworks.com> Sent: Tuesday, September 12, 2000 10:09 AM Subject: Re: 2 volumes or 1 > On Mon, 11 Sep 2000, Bruce Sterling Woodcock wrote: > > > From: "Chris Lamb" <skeezics(a)measurecast.com> > > > But to turn this thread on a slight tangent, I was curious about the > > > performance advantages of spreading drives within a RAID group across > > > multiple controllers. > [...] > > > interested too. :-) Given that More Disks Is Bettah, the question becomes > > > whether or not it's worth the trouble (on a filer) to try to optimize the > > > physical placement of those drives. > > > > Worth the trouble? No. > > Worth the trouble? Yes IMHO. The NetApp 202 class notes state: > > "A RAID group that spans two different controllers shows a 10% > performance degradation." We've been over this before. This note, as written, is grossly false. The penalty is only on writes, and only noticeable if you're already saturating your NVRAM such that you are writing all the time. There is no constant 10% performance penalty. Bruce

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RE: NOW enhancement
by Nail, Larry 13 Sep '00

13 Sep '00

I second this suggestion.. -----Original Message----- From: Todd C. Merrill [mailto:tmerrill@mathworks.com] Sent: Wednesday, September 13, 2000 10:44 AM To: toasters(a)mathworks.com Subject: NOW enhancement When I get email notification of a change in status of a support call, it looks something like: CASE #: xxxxxx.00000 SERIAL #: yyyyy Site: "mathworks" City: Natick Status: Closed Symptom: "CPU ECC ERROR; SYS ECC ERROR; DIMM=J27" Internal action associated with the case has been completed Actions due to be performed: --------------------------------------- Action: RMA Status: OPEN Due Date: Jul 6 2000 For further information, please view your case at "http://now.netapp.com/Self-Service/Forms/frmCaseView.asp?CaseId=xxxxxx.0000 0" If you reply to this mail please do not change the Subject line. Is it possible to include in this email the *changes* to the case? It is an annoyance to go to a web browser, login to the NOW site, and check. Seems like just enclosing the changed actions would be straightforward, and I can decide if I need to login to NOW to add comments or not. Thanks for listening. Until next time... The Mathworks, Inc. 508-647-7000 x7792 3 Apple Hill Drive, Natick, MA 01760-2098 508-647-7001 FAX tmerrill(a)mathworks.com http://www.mathworks.com ---

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qtree name with white space - how does quota work?
by ushwy1 13 Sep '00

13 Sep '00

Situation: A qtree name with white space within - "/vol/vol0/human resources" Question: How do I modify quotas file to make qtree quota work for this qtree? "/vol/vol0/human resources" 100m 3k The above line does not work ... Thanks for your help! Steve. __________________________________________________ Do You Yahoo!? Yahoo! Mail - Free email you can access from anywhere! http://mail.yahoo.com/

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AIT libraries
by Larry Goodman 13 Sep '00

13 Sep '00

If any of you kind toaster'ites have experience with AIT2 tape libraries, I'd like to here your advice about the different brands available. I've been researching these devices and they all seem to claim pretty much the same specs (duh, they're all using the same Sony drive!). I'm particularly interested in the durability of the robotics. I've been looking at libraries from Spectra Logic, Qualstar, Adic and Overland Data, usually providing from 12 to 24 slots (single drive). The Qualstar folks claim that they're the only supplier that uses a "lead-screw" design instead of belts for better reliability. Any comments? Thanks, Larry.Goodman(a)Intense3d.com

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RE: Solved (Was [toasters] Problems with quotas )
by Davis, Barry 13 Sep '00

13 Sep '00

Just an FYI...NetApp has put a "Panic Message Analyzer" onto the NOW site at http://now.netapp.com/NOW/pmsg/pmsg.cgi I pasted the Panic message below into the analyzer and it came up with the same conclusion: Bug Identified: 26472 Bug Title: quota on/resize can panic the machine Description: If user or group names are specified in /etc/quotas and a name cannot be resolved using /etc/passwd or NIS, the filer will panic when reading the quota names file during a quota resize or quota on. Workaround: Avoid doing quota resize and quota on, or use numeric ids to specify users and groups, or make sure any names used will resolve. Suggestion: Upgrade to release 5.3.6R2 Let the Release Comparison Tool show you the differences between 5.3.6R1 and 5.3.6R2. Download the suggested release. > -----Original Message----- > From: kubek [mailto:kubek@insa-tlse.fr] > Sent: Tuesday, September 12, 2000 3:00 PM > To: toasters(a)mathworks.com > Subject: Solved (Was [toasters] Problems with quotas ) > > > > Thanks to the list ... > > I received many answers : one solution is to reboot the netapp with > floppy, at the menu choose "boot without /etc/rc" then delete the > offending quotas file. In my case the error came from an unknown user > being assigned a quota. > > But ... this problem is already known by netapp which kindly created > some time ago a new release of data ontap ( bug number 26472 > corrected by 5.3.6R2). I'll wait for my NOW account ... > > The filer is now up and waiting for my next error :) > > thanks one more time, > Jean-Marie >

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OID's and MIB's
by Demon Toasters Exploder 13 Sep '00

13 Sep '00

Hello all, I've been recently twiddling about with some snmp monitoring of the funky netapps we have here. The big problem I've fallen over is the complete lack of details when it comes to lists of OID's and specific snmp queries you can make. I need a list of all the things that can be queried on the Netapp, I've managed to pull bits and bobs from the mib and other sources, but the biggest one I've had so far is find entries for Bytes/s per interface (the same for collisions/errors). Are there such entries for load, tempuratures and so on? I've trawled now.netapp, a few FAQ's and also the archived mailing list without much joy :( Any lists or pointers in the right direction would be appriciated. Regards, D. -- Drav Sloan - Insane Senior Mail n News Admin - Platform Management Work Email: dsloan(a)demon.net / Fun Email: holborn(a)real-life.tm

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2 volumes or 1
by Pesce, Nicholas (FUSA) 13 Sep '00

13 Sep '00

Gentlemen, I need your opinion on a creation I am about to unleash on our unsuspecting production site where I work. I currently have a 740 filer with 2 shelves and 7 disks. 3 disks are in the first shelf and configured for volume 0 root volume 4 disks are inthe second shelf and configured for volume 1 Now, since I didn't put this box together. I was wondering if it is better to make all of these disks one volume. There are heavy reads and writes to the volume1, but I don't know if having a heavily used volume combined with root functions will kill my performance. Besides this will make a larger volume for more distributed writes (8 total disks versus 4). Also I will be saving 1 disk of data space because I won't need the second parity disk. Addition information is that they are fibre channel shelves (of course). And that the data is not important (washed away daily). Assuming that the root volume functions do not critically affect my box (and I don't believe that they do, as most of it is running from memory) I believe my choice is correct. Just wondering if you guys agree with this hypothesis or not. Nicholas Pesce Internet Production Services Phone: 847 488-6384 Pager: 888 785 3455 Fax: 847 488 3434

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toasters September 2000