toasters February 2000

toasters@lists.teaparty.net

102 participants
113 discussions

level 2 oplocks and MS outlook
by Graham C. Knight 22 Feb '00

22 Feb '00

I think i am running into bug 20270: "Outlook users get access is denied (or similar) errors" The bug report states the cifs.lvl2_oplocks_cap should be turned off in order to fix the problem. I have about to 8000 CIFS users and only a handful have had this kind of problem. What are the ramifications to my other 7990 users if I turn off level 2 oplocks to fix the 10 users that are having the problem? Should i just ship the 10 problem users to an NT server? Looking for answers from those in the know. :-) Thanks, Graham

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toaster config for Cricket
by Ronan Mullally 22 Feb '00

22 Feb '00

I'm in the process of setting up cricket (http://www.munitions.com/~jra/cricket) to monitor some of our network equipment. I'd like to include our toaster in this. Before I sit down and try writing up the configs myself, has anybody done this? If so, care to share the config tree? -Ronan

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Moving from one NT domain to another
by Dani Tal 22 Feb '00

22 Feb '00

Did any of you toaster users have any experience with this ? I tried it yesterday and got cold fit in the middle. As a result I answered “no” to the delete computer account question , The filer proceeded and restarted CIFS with the old setup. The filer is in “coming up” status (On the GUI ) ever since. The filer looks normal, we have active CIFS shares etc. I did not like the idea of bring the filer CIFS down again before it completed the “coming up” status. Any Suggestions ? Is it really still “coming up” or just a GUI bug ? We are on release 5.2.1. P.S. after using the GUI to bring CIFS down we where unable to change the NT domain on the GUI. Best Regards , Dani Tal MIS Carmiel Information Systems and Technologies, SEABRIDGE Carmiel Site Newton House Industrial Area 5 , P.O.Box 323 Karmiel 21613 Israel Tel. +972-4-9953200 X 0403 FAX. +972-4-9888097 mail: mailto:dani.tal@seabridge.co.il <mailto:avi.ashkenazi@seabridge.co.il> Web: http://www.seabridge.co.il <http://www.seabridge.co.il>

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Part numbers/source needed for F630 RAM
by marcotte＠panix.com 21 Feb '00

21 Feb '00

I need to buy third party RAM and NVRAM for our F630. Does anyone have part numbers (or sources)? Thanks! -- - Brian

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Bug # 18641
by Jason Middlebrooks 21 Feb '00

21 Feb '00

What is Bug # 18641? I was told that was an internal bug and no ifo could be found on the now site. Thanks Jason

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RE: FTP uploads from the UK (fwd)
by Nguyen, Alan 21 Feb '00

21 Feb '00

After about a month and a half of testing with customers like yourself, Network Appliance has a new FTP site. The new FTP site will be available for all of our customer's use beginning tomorrow (2/2/2000) at 6PM PST. The transition from the current FTP site to the new will be transparent and the FTP site will not have any downtime. Please read below for more details regarding architecture. Again, thank you for your patience. If you have any questions, please reply to me at anguyen(a)netapp.com <mailto:anguyen@netapp.com> Alan. Mgr., IT Server Ops Network Appliance -----Original Message----- From: Nguyen, Alan Sent: Thursday, December 02, 1999 10:49 AM To: 'toasters(a)mathworks.com' Subject: FW: FTP uploads from the UK (fwd) To All, First, I must apologize for NetApp's poor FTP site performance. The responsibility for this in my group. The situation is our internet connection is highly-utilized and thus your access to our FTP site is affected by this. Actions have been taken to increase internet bandwidth in the next few weeks. However, despite this, it will be superseded by our new FTP implementation. We have designed a new FTP site to improve security, system management, increase internet bandwidth/presence (i.e. ISP hosted site), and system redundancy. Because our current infrastructure is very out-dated, we have taken the "big-bang" approach rather than making incremental improvements. In a little more detail, our new FTP site is at a web-hosted site with 100MB bandwidth capacity vs current T1, and is configured with two fail-over dual-processor Unix systems with cluster fail-over (F760) Filer pair for storage. In short, the new site is very robust and will scale to meet to our customers' needs. What has been done thus far? Contract has been signed with new web-hosting site. Networking infrastructure is in place. Programming is complete for account and directory management. The new systems are racked at the new web-hosted site. As I type this, we are plugging in the cables for the new systems. What's the schedule? In the next two days, we will perform internal/external FTP tests. On Monday (Dec 6th), we will start live tests with customers assuming everything goes well this week. After which, the new site will go live. I will announce to this list when we are live. If you have any questions, please direct them to me anguyen(a)netapp.com <mailto:anguyen@netapp.com> or reply to this list as I will be joining this list soon. Again, thank you for your patience. Alan Nguyen Network Appliance Mgr., IT Server Operations

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Netapp, AIX, and disk pacing
by Richard L. Rhodes 21 Feb '00

21 Feb '00

<color><param>0100,0100,0100</param>Earlier this year we had a big thread about using NetApps as a DB disk subsystems. I had made the following comment in reference to performance on AIX: ></color>7) The one problem I do have, is that during a high sequential write >load, like creating an Oracle tablespace, the high sequential write >rate locks out other processes from doing I/o to the netapp. For >example, during a create of a 2gb db file, If I (in another window) >try and do anything that does I/O, I can wait for 5/10/15 seconds for >the command to come back. I'm not sure why this is, but I think >this is a problem in AIX, NOT the netapp - because if during the >massive sequential writes I try and access the netapp from another >computer I get great response. AIX must be queing NFS I/O's or<bigger> ><smaller>something - which doesn't make sense! Well, I kept looking for an answer . . . and finally found it. AIX has 2 options that control disk i/o pacing: minpout and maxpout. They are defined in the doc as follows: :D<color><param>0100,0100,0100</param>isk-I/O pacing is intended to prevent programs that generate very large :amounts of output from saturating the system's I/O facilities and causing :the response times of less-demanding programs to deteriorate. Disk-I/O :pacing enforces per-segment (which effectively means per-file) high- and :low-water marks on the sum of all pending I/Os. When a process tries to :write to a file that already has "high-water mark" pending writes, the :process is put to sleep until enough I/Os have completed to make the number :of pending writes less than or equal to "low-water mark." The logic of I/O- :request handling does not change. The output from high-volume processes is :just slowed down somewhat. The high- and low-water marks are set with <bold>smit</bold> :by selecting <bold>System Environments</bold> -> <bold>Change / Show Characteristics of :Operating System</bold> and then entering the number of pages for the high- and :low-water marks. The default value for the high- and low-water marks is 0, :which disables pacing. New I/O pacing parameters normally take effect :immediately and last until they are explicitly changed. The default for these parms is "0" - no limit. I found a comment in the performance tuning guide that said if your having problems with disk pacing, try setting these to maxpout=32 and minpout=16. After doing this i/o was much better (even normal) during a tablespace create. The manual stated that there is a small performance hit when setting these parms from default, but I didn't notice any in my testing. So, for those of you using a Netapp for a db on AIX, you might want to look into these parms for yourself! Rick <nofill> ---------------------------------------------------------------------- Richard L. Rhodes e: rhodesr(a)firstenergycorp.com Ohio Edison Co. p: 330-384-4904 f: 330-384-2514

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RE: NVRAM memory
by Y. Hiro Kaneiso 20 Feb '00

20 Feb '00

You should also pay attention to cp_from_cp. If you see non-zero numbers there, it means a cp could not be made in the background (even forced) and responces to clients' requests were made waited until a cp is finished. The system is obviusly short of NVRAM. -hiro -----Original Message----- From: Bruce Sterling Woodcock <sirbruce(a)ix.netcom.com> To: Eyal Traitel <eyal.traitel(a)motorola.com> Cc: Eyal Traitel (r55789) <eyal.traitel(a)motorola.com>; Karl Swartz <kls(a)netapp.com>; Jay Orr <orrjl(a)stl.nexen.com>; lrazo(a)netapp.com <lrazo(a)netapp.com>; toasters(a)mathworks.com <toasters(a)mathworks.com>; beepy(a)netapp.com <beepy(a)netapp.com> Date: Sunday, February 20, 2000 2:35 AM Subject: Re: NVRAM memory ----- Original Message ----- From: Eyal Traitel <eyal.traitel(a)motorola.com> To: Bruce Sterling Woodcock <sirbruce(a)ix.netcom.com> Cc: Eyal Traitel (r55789) <eyal.traitel(a)motorola.com>; Karl Swartz <kls(a)netapp.com>; Jay Orr <orrjl(a)stl.nexen.com>; <lrazo(a)netapp.com>; <toasters(a)mathworks.com>; <beepy(a)netapp.com> Sent: Saturday, February 19, 2000 8:52 AM Subject: Re: NVRAM memory > Thanks. > > I already can see this on one of the more used ones: > > cp_from_timer = 288539 > cp_from_snapshot = 210065 > cp_from_low_water = 0 > cp_from_high_water = 2 > cp_from_log_full = 138834 > cp_from_timer_nvlog = 10 > cp_from_cp = 6006 > > > Can someone from NetApp answer on if it would be useful to have an upgrade > for such machine ? To me cp_from_log_full seems high. I did some digging in my old notes and found that one engineer recommened cp_from_log_full should only be 10% of cp_from_timer. I'm not sure what cp_from_snapshot is but even if you add that to cp_from_timer your log is still filling up over 25% of the time. cp_from_cp is not too bad, though, so maybe it is not hurting you that much. Again, I'd check systat 1 during heavy loads and if it looks okay, your NVRAM is being heavily utilized but not overloaded. Bruce

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NetApp disk replacement "disaster": post-mortem
by Will Partain 19 Feb '00

19 Feb '00

Folks, I've just been through a "replace a disk" scenario that went wrong. It *isn't* a "disaster", because the machine wasn't being used for anything interesting at the time. I am recounting it here in case others can benefit (and so you can all smirk at my expense :-). Old NetApp F220. One disk died. Called support guys; they sent another disk. Typed 'disk swap', swapped a disk, typed 'disk unswap'. Hmmm. One thing wrong, another possibly. I'd swapped the wrong disk (counted them from the wrong end), and I'd possibly taken too long to complete the swap. All I know is, the filer went down in a blaze of glory. When I rebooted, it failed to load the OS; error "Invalid opcode" (i.e. it read junk off the disk). So I rebooted from floppies (after swapping the disks back around correctly), and that seemed cool -- it figured out which disk was what, and did all the necessary RAID reconstruction. Everything looked OK. Rebooted. Failed to load the OS: 'Invalid opcode' again. Hmmm... At this point, I said, "Never mind" and just rebuilt the whole thing from scratch. What I *think* I could've done was: reboot from floppies; splat the ontap stuff into /vol/vol0/etc from afar; typed 'download' at the filer, and it might've worked. (But would I have had reason to trust any of the ordinary RAID data at this point?) If you spot a place where I (+ support guy) went badly wrong, other than what I've outlined, I'd like to know. Thx, Will

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Re: Backing up a filer
by mds＠gbnet.net 19 Feb '00

19 Feb '00

A few mails condensed here: On Tue 15 Feb, 2000, Jay Orr <orrjl(a)stl.nexen.com> wrote: > My understanding of Budtool and Quick Restore was that you could pull tar > files off of the tape directly. Generally, the desire for this ability is: > > 1) if the machine with the backup software goes down, you can still do > recoveries, and > 2) you can restore to differing systems. That was what used to be my line on tape formats too. Then I investigated how Legato could be used in the case of the backup server itself dying. The key is to know (have writtenfor yourself) a procedure for rebuilding a backup server efficiently. I used to think Legato was a pain at this, but it turns out that if you set up a server reasonably you can follow their Disaster Recovery Guide and be back in business pretty quickly. In about as much time as it would take you to find the right tapes somehow and trawl them by hand using tar or dump/restore. I'm assured ADSM and Veritas and presumably everyone else as well has their own Way. > I will grant that the Veritas solution of interleaving streams does sound > well thought out and probably more efficient, but from an admin's > perspective, you have to figure some day the worst will happen. AFAIK The interleaving thing was born of expediency, for all the backup product vendors: for backing up from slow individual clients to tapes that only work efficiently when streaming. Tape lifetimes are also reduced sharply when tapes are constantly stopped, rewound-a-bit and set to streaming again. The fact that most admins like to get their backups done in the same windows, and using the same policies, relying on the backup software to work at least some of it out for them, means many backups get scheduled for the same time anyway. On a more banal note, is it not tempting to set client-paralellism up a notch, it sounds sexy and you never know, it *might* help. > Reminds me of Microsoft's argument against solaris : "Sun is trying to > resurrect the 1960s-era mainframe paradigm and return computing to > old-style timesharing." (www.dot-truth.com) Amazing how marketing appeals > to feelings, not empirical data. Always the way. Often works too - like when vendors sell to managers who don't then employ their technical staff in product evaluation and selection cycles. Or worse, they do but it's all a shame exercise, which means that the time was wasted on top of the bogus decision.. I'm not bitter, really. 8) > Until the system with the backup-product fails.... Ah, well I refer to my point about having a good procedure for dealing with that. IMHO it's more important for business continuity to have the whole backup service back than it is to get the first restore done - because Murphy will most likely have the most restores you ever saw be requested in that window, just after you decided that doing that one restore *then* getting the backup system going again would be the best policy. Been there. Got bitten. > But that all said, your comments are appreciated and gives me food for > thought. I guess it weighs in as one of the older Unix paradoxes - ease > vs. utility (can't think of a better way to phrase that). Sure, who > wouldn't want the easiest to use backup software? But from an admin > perspective, we have to be able to pick up the pieces if it all explodes > and put it back together ASAP. Yup it's a balancing act - the two aren't necessarily mutually exclusive goals though. >-- End of excerpt from Jay Orr On Tue 15 Feb, 2000, Steve Kappel <steve.kappel(a)raistlin.min.ov.com> wrote: > Interleaving (multiplexing is the term in NetBackup) is optional in > NetBackup. You can turn it off for any class. This is good to know - though I guess you have to be confident of the ability of a given client to supply data to keep the tapes fed. > NetBackup NDMP does NOT use multiplexing. Also note that for NDMP > the tape format is determined by the NDMP server vendor. NDMP uses dump format as well doesn't it? So all the propositions above get a little messed around here anyhoo. >-- End of excerpt from Steve Kappel On Tue 15 Feb, 2000, "Eyal Traitel" <eyal.traitel(a)motorola.com> wrote: > Are there any plans / ideas from Veritas on improving backup/restore times of > filers ? Here's hoping. > It seems that the tape/backup s/w is not keeping up well with the filers' huge > sizes ? Oh the number of times I've bewailed this too. > What is the best configuration that can give us best performance ? Anyone fancy a quick poll on how fast they can backup how much? >-- End of excerpt from "Eyal Traitel" -- -Mark ... an Englishman in London ...

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toasters February 2000