toasters

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13515 discussions

NTP not working
by Frank Bonnet 02 Apr '02

02 Apr '02

Hi I'm still in trouble wit a F85 running 6.1.1R2 the clock is getting late ( about 20 mins a week ) I have to reset it manually to correct the local time of the filer. Is this a known Ontap bug or is it a hardware problem ? NTP is on but it doesn't seems to works well as all our UNIX machines are NTP sync with success on the same NTP server ... Thanks for any help.

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FLOW CONTROL
by Noll, Kevin 02 Apr '02

02 Apr '02

Hi All We are standardized with Sun and Cisco equipment. All equipment on our Database Vlans are using Gig Ethernet. Flow control on our sun servers are set to on. However, on our Cisco Switches, the settings are as follows. set port flowcontrol 2/1-12 send desired set port flowcontrol 2/1-12 receive off I am not a cisco engineer, but would like to know if this is correct. I believe it should be both on. What type of throughput should you see of a file copy over gig ethernet? Thanks KEVIN NOLL ******************************************************************************************** " This message contains information that may be privileged or confidential and is the property of the Cap Gemini Ernst & Young Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message ". ********************************************************************************************

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SNMP Failure Detection
by Ben Rockwood 31 Mar '02

31 Mar '02

Hello Toasters. I've been using a script to monitor disk failures on our filers. It's worked pretty well in the past, but I've hit a snag today... Normally I can tell if a disk has failed in one of two ways: 1) Check the SNMP "disks.failed" value, if !eq 1, we've got a problem. 2) Check via SNMP, the total number of disks, then check the number of active disks, and add to it the number of spare disks. If total disks !eq to active plus spare disk, then there is a failure. The second method is often needed for the failures that "slip through the cracks", and is sufficent. However today a disk failed and in doing so was removed from the TOTAL disk count, and not added as a failed disk, so in a case where I have 84 disks, I get the following output from my script: The global message is: "The system's global status is normal. " Total disk count is: 83 The Active Disk Count is: 82 The Spare Disk Count is: 1 The Failed Disk Count is: 0 I've omitted the non-relevent output from my script, which does simple snmpget's from the Net-SNMP app. Anyway, three things went wrong here, the global message doesn't reflect a failure. The total disk count was decremented when it should not have and the failed disk count is still eq to zero. Now, because I know that all our filers should always have 2 spare disks I can rewrite my scripts to look for this, however I had previously written them in a very portable way, which hardcoding the number of spares to look for will degridate... Any ideas why this happens? I'm sure I'm not the only one who's seen this. Ben Rockwood brockwood(a)homestead-inc.com

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RE: Cluster licenses -- what if I break the cluster will they sti ll w ork?
by Art Hebert 31 Mar '02

31 Mar '02

I did a 100MB copy clustered and non clustered and I saw a 15% hit due to having to copy the nvram. But the clustering is very valuable, I just showed our ceo how it works and he was quite happy. He was in helping us do some computer room work. art -----Original Message----- From: kevin graham [mailto:kgraham@dotnetdotcom.org] Sent: Tuesday, March 26, 2002 8:44 PM To: Art Hebert Cc: 'toasters(a)mathworks.com' Subject: RE: Cluster licenses -- what if I break the cluster will they sti ll w ork? > I thought the license keys were different for every machine. Are you saying > I can use the license key for one machine on another. Aren't they tied to > serialnumbers? AFAIK, no. > Anybody else out there with a cluster, what does is listed when you run > license on each head? Now that I look, both heads of my cluster have the same license keys. I'm not sure if that's intentional, or the same lazy case mentioned previously. Ugh. > I figure we will get a 15% improvement in performance if I break the > heads. How much performance improvement have people seen when they have > moved from 100mb to gig? Haven't had a chance to compare them side to side, but the gige's are preferable even for equivalent traffic given some of the extras, such as checksum offloading, jumbo framing (if you can use it) and interrupt coalescing. Where are you extracting the 15% number though? (and how is the 100:1000mb related?) ..kg..

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RE: Vol/qtree/dir/file snapshots (was Re: DataONTAP 6.2) ORACLE DATABASES
by Melvin, Grant 31 Mar '02

31 Mar '02

Hi Kevin, > We have multiple Oracle Databases of different sizes. > However, most of our databases are around 20 - 30 gigs. You might want to consider having each database be in its own 20 - 30GB qtree within a single volume. That way you can SnapMirror each qtree on an individual schedule, make multiple copies of the most critical databases to different locations or even backup to a NearStore R100 using SnapVault for later tape backup, etc. Obviously this means that you wouldn't use Volume based SnapRestore if you have more than one database per volume, but you could use Single File based SnapRestore within a single qtree. Unfortunately, we don't have directory or qtree based SnapRestore, as pointed out earlier, but you could possibly use a perl script (perhaps check on NOW) to perform the directory or qtree restoration. The database files would be restored without copying the data, but new inodes are created to reference the files in the active filesystem. > All my problems would be resolved if we could justify the > use and waste of so many disks. I wonder, having multiple > small databases on the same volume with qtree snapshots > would be something of the future. Or maybe not. Any > recommendations would be appreciated. I hope the above helps with your disk usage. I don't know your system intimately, but I'd expect that you could easily have a dozen or so databases per volume with Data ONTAP 6.2. For more info on SnapMirror, SnapVault and SnapRestore, etc. Check out the web page at: http://www.netapp.com/solutions/continuity Cheers, Grant For information on NetApp's Data Protection Solutions view http://www.netapp.com/solutions/data_protection.html. =========== grant(a)netapp.com ========== Grant Melvin === === Software Development Manager === === Data Availability & Management === |\ | __ ___ /\ __ __ === Network Appliance === | \ | |__ | /__\ |__| |__| === 475 East Java Drive === | \| |__ | / \ | | (R) === Sunnyvale === === California, 94089 === === Tel:(408)822-6761 =========== Network Appliance ========== Fax:(408)822-4578

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VLD drive for UNIX
by Uros Lampret 31 Mar '02

31 Mar '02

Hi! I know there is Virtual Local Drive software called SnapDrive for Win NT and 2000. Is there similar software to do this on UNIX. I have an aplication that don't want to run from NFS mount. I need to mount this in the way that OS will see it as local drive. I use IBM AIX. Best regards, Uros _____________________________

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RE: Freeing NFS locks
by Edward Hibbert 30 Mar '02

30 Mar '02

That sounds useful - would the reacquire be transparent to the client apps holding the locks? If so, then I could just issue that periodically...and so could the NetApp :-). -----Original Message----- From: Dylan Northrup [mailto:northrup@loudcloud.com] Sent: 30 March 2002 19:46 To: Edward Hibbert Cc: toasters(a)mathworks.com Subject: Re: Freeing NFS locks On Sat, 30 Mar 2002, Edward Hibbert wrote: :=I have a situation where I have a host which is not pingable, but lock_dump :=shows it as having a lot of NFS locks active. := :=Two questions: :=- Is there anything I can do to free up the locks (just for that host)? :=- Why doesn't the filer spot that the host has died, and free the locks :=automatically? There's an rpc call you can do to the filer to instruct it to free all locks and re-acquire them from hosts that are still responsive. You'll likely have to write a program to do this since I don't believe there is a utility that will allow you to do this already. You can get more information by looking at the NLM (Network Lock Manager) spec, particularly the NLMPROC4_FREE_ALL procedure. The reason the filer doesn't know the host has died is because NFS is inherently stateless and the NLM tries to impose state on top of NFS. Because NFS is stateless, the only time the filer knows anything has changed is when the client communicates with it. If the client panics or halts without shutting down normally the filer doesn't know it's fallen off the map and holds the locks like it should waiting for a a communication that won't come until the host is rebooted or its network connectivity is re-established. Hope this helps. -- Dylan Northrup <*> northrup(a)loudcloud.com <*> Evil Dylan, the Unix Dylan "Harder to work, harder to strive, hard to be glad to be alive, but it's really worth it if you give it a try." - Cowboy Mouth, 'Easy'

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Soundj - Skol Beats
by Soundj - Skol Beats 30 Mar '02

30 Mar '02

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Freeing NFS locks
by Edward Hibbert 30 Mar '02

30 Mar '02

I have a situation where I have a host which is not pingable, but lock_dump shows it as having a lot of NFS locks active. Two questions: - Is there anything I can do to free up the locks (just for that host)? - Why doesn't the filer spot that the host has died, and free the locks automatically? Thanks, Edward.

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Re: Vol/qtree/dir/file snapshots (was Re: DataONTAP 6.2) ORACLE D ATABASES
by ScottUCE＠aol.com 29 Mar '02

29 Mar '02

Joe: Cheap 7x9gb FC7 NetApp shelves could make a great place to build a root volume on your customers' existing filers ........ and, coincidentally, we happen to have dozens of them! :-) I'd be happy to get around 800.00 or 900.00 for a fully populated FC7 shelf and would provide a one-year advance parts exchange warranty, to boot! :-) Scott Fischmann Union Computer Exchange, Inc. 6233 Idylwood Lane Minneapolis, MN 55436 Phone: 952 935 7282 FAX: 952 935 5056 scott(a)unioncomputer.com In a message dated 3/29/2002 11:13:54 AM Central Standard Time, joe.luchtenberg(a)data-line.com writes: > I think Chris' point has more merit than you give credit, Quentin. There > are many issues to consider, including segregating the root volume, parity > disks, costs of additional shelves/cabinetry/head units, etc. Granted the > cost of disk capacity does not scale linearly. However, if you're not > using > the additional capacity in a volume (30GB database on a volume of 5-6 72GB > drives, as in Chris' scenario) - and there may be very good reasons for > this > - then big drives are definitely not the most cost-effective way to scale > capacity. > Qtree-level SnapMirror and/or file-level SnapRestore may solve some of > these > issues related to capacity management, allowing you to put more databases > on > the same volume. Even still, it would be nice to have an internal 2x9GB > volume (maybe even with solid state disks!) to serve as root, rather than > "wasting" 72GB drives and shelf slots. > > Just musing... > > Joe > > > Joe Luchtenberg > Dataline, Inc. > > Email: joe.luchtenberg(a)data-line.com > Phone: 757-457-0504 (direct line) > 757-858-0600 (front desk) > 757-285-1223 (mobile) > Fax: 757-858-0606 > > Please visit us at www.data-line.com > > > > > -----Original Message----- > > From: Quentin Fennessy [mailto:quentin.fennessy@amd.com] > > Sent: Friday, March 29, 2002 8:29 AM > > To: Chris Lamb > > Cc: Melvin, Grant; 'Noll, Kevin'; 'Toasters (E-mail)' > > Subject: Re: Vol/qtree/dir/file snapshots (was Re: DataONTAP > > 6.2) ORACLE > > DATABASES > > > > > > > > Chris asked: > > > Of course, one just begs to ask: WHY is it that we > > continue this absurd > > > notion that bigger is always better? Who the hell needs a > > 72GB BOOT DISK? > > > Sure, maybe when Windows(tm) 2004 comes out... :-) > > > > This is a detail that is unnecessary to sweat. Large drives > > don't have to be > > full. The cost of capacity is dropping -- at a given time in > > product life, a > > 72GB disk is not 8x the cost of a 9GB drive. It may well be > > 1x the price, > > this 1/8x the cost! > > > > Leave the disk space empty if its use is not appropriate. > > > > If you need extra spindles for performance, buy them. Don't > > get caught in the raw capacity trap. > > > > I cannot imagine that it is economical to continue to sell > > relatively smaller disks, when for the same outlay the > > disk manufacturers can provide more capacity. The factories > > can provide X disks (or disk platters) per week. They will > > optimize appropriately. And they would go out of business > > if they did not, because the competition will! > > > > As a system administrator we (you and I) all have to exercise > > judgement on > > how to best manage these resources. If your boss or your > > customers override > > your judgement then something should change. But it won't be the > > manufacturing economics of disk drives! > > > > > > > Yes, it is a fundamental law of computing that files and > > databases will > > > always expand to fill the available disk space, but why is > > it that you > > > can't even buy a 9GB drive anymore? A 20-30GB database, even if you > > > double or triple it in size, is still going to fit on *one* > > shelf with > > > 9- or 18GB drives. > > > > > If I had a 30GB database, I'm sure my DBA would agree - > > striping 5-6 9's > > > together makes way, way more sense than throwing piles of > > higher-cost 36's > > > or 72's at it, only to waste massive amounts of space in an > > effort to keep > > > performance up. Of course, our database grows at over 30 > > million rows per > > > week, so adding 36's makes sense for us. :-) Still! I > > echo the call for > > > using appropriately-sized drives where it makes sense. :-) > > > > > All of my production servers have ridiculously huge boot > > drives because > > > that's the only way Sun (or anyone else) sells them these > > days. So I > > > mirror / & /var, interleave swap, and even after sizing > > things to some > > > absurd degree, there's usually a chunk of 8-10GB of free > > space - 'cuz all > > > the good stuff lives on the filers. Having that local disk > > space there > > > just means that someone is going to want to USE it, and > > that's bad - it > > > means I'd have to actually back up those machines, and I > > *hate* backups. > > > (In the exceedingly rare case where both drives of a > > mirrored boot volume > > > are corrupted or destroyed, it's always going to be faster > > to re-Jumpstart > > > and cfengine the machine from scratch than to restore from > > tape anyway. > > > Local data just messes up all that beautiful automation. :-) > > > > > A long time ago I was going to recommend that filers come > > with a pair of > > > internal boot drives - like a mirrored pair of 4GB or 9GB drives > > > _strictly_ for use as the boot volume, with some space for > > logs, etc. > > > There's plenty of room inside the big filer heads for a > > pair of drives. > > > But the move to Flash RAM cards in the newest machines is > > even better - > > > fewer moving parts. :-) > > > > -- > > Quentin Fennessy Quentin.Fennessy(a)amd.com > > Office: 512.602.3873 > > Cell: 512.694.7489 >

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