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520 filer, CPU pegs...
by parker＠redback.com 03 May '01

03 May '01

Hi all, I have a 520 filer running 5.3.7R2 (firmware 2.1_a) with what I perceive to be a problem - I need someone to tell me if this is normal or not. Essentially, when I transfer a single big file (100 MB is my test file) to it over NFS, the CPU pegs at between 98% and 100% for the duration of the transfer (about 24 seconds). This causes some wierd things to happen... I've discovered that if I use NFS version 3 (either TCP or UDP), doing a transfer as above AND trying anything else on the filer (as simple as an 'ls -l') will cause the data transfer to break, i.e. the 'cp' will exit with an error "write: Resource temporarily unavailable". In actual fact, the transfer does not STOP, it continues in the background, however the copy returns an error code and the above message. Using NFS version 2, either TCP or UDP, the cp completes properly. Because the CPU is pegged, the aforementioned 'ls' can take 10 or more seconds in a directory with perhaps 10 files in it... not too good. I find this to be bizarre behaviour... both the CPU getting pegged while transferring a single file, and the copy breaking... has anyone else seen this? Cheers, Ross -- Ross Parker | | "Lisp has all the visual appeal of Diagnostic Engineer | oatmeal with fingernail clippings Redback Networks Inc. | mixed in" - Larry Wall parker(a)redback.com |

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ndmp restore process
by neil lehrer 03 May '01

03 May '01

hi, we got legato to do a backup and now we are trying a restore. i deleted a directory from the filer and selected it for restore. we are ontap 5.36r2, so no direct access restore. watching the filer from an nt machine, we immediately saw the file names come back, with 0 bytes and no attributes. much later the file sizes came back and the attributes, but legato keeps reading the tape and every 5 minutes we see the "we have read so many bytes" messages. i would think once the files are back the restore would complete, will it go to the end of the tape? --

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Re: Cluster + Cisco Switch
by Seth Moskowitz 03 May '01

03 May '01

Not sure about spantree portfast haven't heard of that before. I believe our first failover test was actually an accident but we didn't have live users on it yet. It was not spontaneous but there was only about a 10 second delay. All you need to do it make sure when you configure it that you specify the name of the partner when you set up the NIC's other then that the filer basically does all the work in the failover situation. There is a small delay during the give back as well. >From: Daniel Oxenhandler <daniel(a)sprintlabs.com> >To: "'toasters(a)mathworks.com'" <toasters(a)mathworks.com> >Subject: Cluster + Cisco Switch >Date: Thu, 3 May 2001 08:38:03 -0700 > >Friends, > >We have just brought up a cluster with two F740 filers, running ONTAP >5.3.6R2. They are connected by Gigabit Ethernet to a Cisco Catalyst 5500 >switch. This is on a 9 port Gigabit Etherchannel module. We didn't get a >chance to test the failover behavior, and have questions for anyone who >might be running a similar configuration. > >Is the failover instantaneous, as suggested by our NetApp sales rep and CE, >or is there a delay while things sort themselves out in the switch? Is >there special configuration on the switch port that should be configured >for >these (e.g. "set spantree portfast") that should be applied? > >Thanks for your insights... > >Regards, > >Daniel Oxenhandler >Senior Network Engineer >Sprint Laboratories >650-375-4281 _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

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Re: Cluster + Cisco Switch
by Thomas.L.White＠chase.com 03 May '01

03 May '01

never heard of spantree portfast we use cisco 6500's but thenetapp is the puppy what handles the failover as long as you specified the "partner" name when setting up the interfaces it knows who to send out ARP updates as when it takes over for the original owner. tw it is an easy test - halt one of the filers the other one takes over (as long as you have the partners identified and your options "match")

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Cluster + Cisco Switch
by Daniel Oxenhandler 03 May '01

03 May '01

Friends, We have just brought up a cluster with two F740 filers, running ONTAP 5.3.6R2. They are connected by Gigabit Ethernet to a Cisco Catalyst 5500 switch. This is on a 9 port Gigabit Etherchannel module. We didn't get a chance to test the failover behavior, and have questions for anyone who might be running a similar configuration. Is the failover instantaneous, as suggested by our NetApp sales rep and CE, or is there a delay while things sort themselves out in the switch? Is there special configuration on the switch port that should be configured for these (e.g. "set spantree portfast") that should be applied? Thanks for your insights... Regards, Daniel Oxenhandler Senior Network Engineer Sprint Laboratories 650-375-4281

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RE: Does Netapp send out new docs automatically or do you have to req uest them?
by Eaken, Pam 03 May '01

03 May '01

Hi Art, We don't automatically ship new doc boxes for upgrades. However, you can order them through your NetApp rep. They're also online on the NOW site. http://now.netapp.com/NOW/knowledge/docs/ontap/ontap_index.shtml If you happen to order a new Media Package, the online docs are on the CD. Let me know if you need more info. Pam Eaken Mgr. Technical Publications Network Appliance (408) 822-6612 -----Original Message----- From: Art Hebert [mailto:art@arzoon.com] Sent: Wednesday, May 02, 2001 4:34 PM To: 'toasters(a)mathworks.com' Subject: Does Netapp send out new docs automatically or do you have to req uest them? We have docs based on an older release and are going to be upgrading out OS to 6.0, do we need to request new docs? Or does netapp send them out periodically after its designated FCS? Art Hebert Email: art(a)arzoon.com <mailto:art@arzoon.com> Arzoon IT Dept. Phone: 650 522-6125 Mobile: 650 444-8667

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Does Netapp send out new docs automatically or do you have to req uest them?
by Art Hebert 03 May '01

03 May '01

We have docs based on an older release and are going to be upgrading out OS to 6.0, do we need to request new docs? Or does netapp send them out periodically after its designated FCS? Art Hebert Email: art(a)arzoon.com <mailto:art@arzoon.com> Arzoon IT Dept. Phone: 650 522-6125 Mobile: 650 444-8667

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ndmpcopy errors
by Thomas.L.White＠chase.com 03 May '01

03 May '01

I am using ndmpcopy to create a copy of an existing volume on another filer. I have done this before with success. Last night before I left, I started two ndmpcoppies from different filers to different filers. the "share" went through with no errors (247 gig) the "home" is still trying with the following errors as far as I can scroll back in my xterm. intersting fact however when I type rsh source_filer df it shows 230.4 gigs and when issued against the destination filer it shows 230.7 gigs. any known quantities here ? p.s. there are unix homes on the home volume - so maybe the missing ACLs is normal ? sunegibna01: LOG: RESTORE: sunegibna01: LOG: Cannot restore ACL on file 5156302 -- no ACL found on tape. sunegibna01: LOG: RESTORE: sunegibna01: LOG: Cannot restore ACL on file 19140323 -- no ACL found on tape. sunegibna01: LOG: RESTORE: sunegibna01: LOG: Cannot restore ACL on file 16670540 -- no ACL found on tape. sunegibna01: LOG: RESTORE: sunegibna01: LOG: Cannot restore ACL on file 13493699 -- no ACL found on tape. tw

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RE: Does Netapp send out new docs automatically or do you have to req uest them?
by Walters, Mike 03 May '01

03 May '01

The full documentation is available on the NOW site (I hope you're familiar with this - http://now.netapp.com) in either html format or downloadable (& zipped or tarred ;-) pdf form. AFAIK we do not automatically ship any documentation out. Go to the NOW service & Support Home page -> Access product Documentation & work down from there (Data ONTAP, Disk Shelves, Filers, NetCache, etc, etc) Hope this helps ! Mike -----Original Message----- From: Art Hebert [mailto:art@arzoon.com] Sent: 03 May 2001 00:34 To: 'toasters(a)mathworks.com' Subject: Does Netapp send out new docs automatically or do you have to req uest them? We have docs based on an older release and are going to be upgrading out OS to 6.0, do we need to request new docs? Or does netapp send them out periodically after its designated FCS? Art Hebert Email: art(a)arzoon.com <mailto:art@arzoon.com> Arzoon IT Dept. Phone: 650 522-6125 Mobile: 650 444-8667

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RE: Backup solutions for NDMP with F740's
by Melvin, Grant 03 May '01

03 May '01

Hi Tom, Its possible that your backup throughput of 5-10 MB/sec via NDMP to a single DLT drive is limited by the DLT tape device. Anyone with a filer can run basic benchmarking on their filesystem(s) by running a test "dump to null" by running on the console or via rsh: dump 0f null /vol/vol_name Our rule of thumb is to add another 5% overhead in time for the actual writing to tape. Our supported tape devices has increased recently in 6.1 to include: AIT AIT-2 DLT7K DLT8K Mammoth-1 Mammoth-2 9840 3590E You may get faster throughput either by running concurrent qtree backups from each volume or by employing a faster tape device. I'll preempt the "when are you going to support LTO" question by saying we have this drive in our dev labs, but please speak to your sales team about availability of this and other tape devices. I would be interested in receiving either private or public (in this forum) what you (our customers) are planning to do regarding tape devices in the short & long term though. Cheers, Grant -----Original Message----- From: Tom "Mad Dog" Yergeau [mailto:MadDog@fool.com] Sent: Tuesday, May 01, 2001 3:21 PM To: 'Eric Hester'; ''Toasters@Mathworks. Com' ' Subject: RE: Backup solutions for NDMP with F740's Eric, When we went from over-the-wire backups to direct-attach NDMP backups, I saw a big increase in backup performance. Especially in incremental backups. NetApp is very good at finding changed files and dumping them to tape quickly, since on an NDMP backup WAFL figures out what has changed. If you're backing up over the network, your backup server has to parse your entire directory structure looking for changed files. WAFL, on the other hand, can just do an inode scan which is blazingly fast compared to walking a large directory tree over the wire. We generally see 5-10 MB/sec throughput via NDMP to a single DLT drive, depending on how well the data compresses. Oddly enough, database files compress really well and gzip'd files compress really poorly. :-) The only downside is that we use NetBackup 3.4, which does not support the NDMP "DAR" feature. Which means if you have a backup that spans three tapes, and you need to restore a 5K file that's on the third tape, you have to read the first two tapes and and to get to the file you need. So a restore can be painful. But, that is VERITAS' fault for not supporting DAR, and if you use Legato or Syncsort, I think you won't have this problem. (If anyone from VERITAS is on this list... DAR support would be really really nice!) MD -----Original Message----- From: Eric Hester [mailto:erich@nuvox.net] Sent: Tuesday, May 01, 2001 4:47 PM To: ''Toasters@Mathworks. Com' ' Subject: Backup solutions for NDMP with F740's We have been using an ADIC Scalar 218 for some time with our F740 cluster with fairly good results until recently. Our Netapps provide the storage for our Web and Mail clusters. We have experienced pretty serious growth and are seeing some significant slow downs in backup turnaround time. We have up until this point also just been backing up the data over NFS mounts to our NetBackup server. Being that most of the data comes from the mail server side and we use maildir, it is not a huge amount of data but is a huge number of smaller files. I'm not very confident that NDMP would completely correct the problem, but it seems that removing the network/nfs overhead couldn't hurt. I think I have made the decision to go with the ADIC Scalar 1000 with 2 drives dedicated to the Netapps (1 to each in the cluster) with NDMP and 4 more drives dedicated to the backup server for other systems. 2 questions: 1) What are some impressions on NDMP as a performance gain for backups? Right now the network does not seem to bottleneck the process as we have dedicated 100m links from the servers to a separate NFS/backup network, and 4 channel etherchannel from each netapp to that same network. From MRTG graphs this network is mostly idle (10-20m max) even during backups. I don't appear to be able to keep the DLT's saturated (in other words the activity light doesn't stay on the whole time, so it is not streaming non stop) during backups, and I don't know if this is NFS overhead, or there is another problem. Is NDMP more capable of keeping a DLT fully saturated and therefore more efficient, or do I still need to look at this as a Netbackup issue? 2) A little OT but - Does anyone have any good experience with this particular library (ADIC Scalar 1000)? I loved our smaller Scalar.. but have more long term experience with StorageTek. My salesperson has done a good job convincing me of the advantages of this box, and I am pretty much sold. Just curious if anyone else has any horror stories or glowing recommendations. Eric Hester Director of Systems Engineering NuVox Communications eric(a)nuvox.net

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