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13514 discussions

RE: Help with vif's
by johnj.sasso＠ps.ge.com 16 Mar '00

16 Mar '00

The latest version of DataONTAP, 5.3.5, mentioned something about doing load-balancing across the links of a VIF. I have not delved into it any further, but can a NetApp person tell me if the new version indeed does load balancing across the VIF links (of course, on sending data from the NetApp to the client)? --john -----Original Message----- From: Michael S. Keller [mailto:mkeller@mail.wcg.net] Sent: Thursday, March 16, 2000 11:01 AM To: toasters(a)mathworks.com Subject: Re: Help with vif's Arthur Darren Dunham wrote: > > have the Catalyst set up properly. Can someone out there who's done > > this before tell me what we need to do on the cat? > > Do I need to put the vif commands into the rc file? > > Thanks in advance, > > The cisco (unless they've changed something recently) has a limitation > on how it sends packets across the links. Packets destined for the > truck will be hashed onto a link by the last two bits of the hardware > source address. That means if most of your traffic is coming from a > single router port, it's all going to get hashed down to only one link. The answer I received from NetApp, with a similar situation, was that the switch XORs the last two bits of source and destination MAC addresses, then uses that to choose the outgoing port within an EtherChannel trunk. With only four clients making heavy use of the VIFs, MACs clustered. With hundreds of clients, you should see a more even distribution. I built a truth table that showed then-current and desired states, then altered client MAC addresses. Does that answer the question? -- Michael S. Keller, Technical Solutions Consultant, Sprint Enterprise Network Services On loan to Williams Communications Group Voice 918-574-6094, Amateur Radio N5RDV

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Re: NetApp backup recommendations
by Steve Kappel 16 Mar '00

16 Mar '00

>> NetBackup (Veritas) can only dump to tape drives connected directly to an >> NDMP server (i.e. only to a locally-attached NetApp drive, or to a remote >> NetApp with attached tape). It cannot do NDMP backups to a "normal" >> NetBackup media server. I've been told that NetBackup can only restore >> NDMP dumps in place, too -- not to an alternate directory, for example >> (I haven't verified that with the vendor). >> >Hmm this could be deadly for us. Legato recommends direct attached >tape drives which I was preferring and it makes sense for performance. Directly attached drives are more efficient. Even with plenty of network bandwidth, backing up over the network still puts a significant CPU load on the boxes. If the filers are physically within reach, a large library can have some of its drives split off onto separate SCSI buses and one bus attached to each filer. "normal" NetBackup media servers can also have some of the drives. Robotic control can be anywhere in such a config. This is really the best of all worlds (IMHO) as you get direct attach performance on all boxes but you are sharing the library. If they are not physically within reach then 3-way backup to another filer can be used. Large sites may dedicate a NetApp as a "tape server". I believe there are library vendors that are looking at supporting NDMP directly in their libraries. >But we got discussing this issue, and the idea of the NetApp >spontaneously rebooting due to a SCSI bus error (from the tape drive) >came up. For our new NetApp we cannot afford to have this happen. >It's not so critical for our existing filer. Our existing filer runs >OnTap 5.2.1 and has rebooted once (in approx 7 months) due to a SCSI >bus error (a tape got stuck in the jukebox and the filer booted to >try to clear the error). Although with newer revs of OnTap and the >firmware, maybe this isn't an issue any more? I have never seen this with the NetApp's we have in NetBackup development. I see plenty of bus resets but never a reboot. __________________________________________________________________________ Steve Kappel steve.kappel(a)veritas.com VERITAS Software steve.kappel(a)iname.com (Personal)

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Subscription
by Donna Spitz 16 Mar '00

16 Mar '00

Hello, I would like to subscribe to your group: Donna Spitz DonnaS(a)Worksta.com Thank you for your help. Donna

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DLT recommendations
by Ethan Torretta 15 Mar '00

15 Mar '00

I need to buy a DLT device to backup a single F760 in an IS environment. The DLT7000 devices I've found, though, are single-ended. Does anyone have a favorite DLT7000 differential single- or multi-tape device? I've seen people have good luck with minilibraries, but that's an unnecessary expense in this case. I'm also curious about the DLT8000, as I'm buying a new drive anyway. Can they be set to be compatible with a filer? ejt

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NetApp Reseller
by TTSG 15 Mar '00

15 Mar '00

Hi, Can anyone suggest a good NetApp reseller? (In the North East is extra points, able to ship to Germany for even more extra points) (New or used) Also, wondering what the general availability/delivery of one is... Private replies please. Tuc/TTSG

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RE: Incremental backup of snapshots
by Anders Ljungberg S (QDT) 15 Mar '00

15 Mar '00

Hi! I think your problem is the way Legato is handling archive bits in NT. On the readonly snapshot area archive bits cant be reseted. On the NT frontend set the variable NSR_AVIODE_ARCHIVE to YES ( i think ). This will take archive bits out of play and you'll be using mtime. Unfortunally NT is'nt always that consekvent about modifying mtime. Good Luck Anders Ljungberg -----Original Message----- From: Christopher Algar [mailto:christopher.algar@s1.com] Sent: Tuesday, March 14, 2000 5:02 PM To: toasters Subject: Incremental backup of snapshots Have a backup problem using Solstice backup 5.1.1 - Legato networker in drag. I'm backing up the ntfs qtrees of an F760 by adding \\filer\share\.snapshot\nightly.0 to the client save sets on an nt server running the solstice backup client. We have 3 qtrees backed up in this way, all within the same volume, ntfs security style and oplocks enabled. Share Qtree \\filer\home\.snapshot\nightly.0 vol0/home \\filer\fs04_bak\.snapshot\nightly.0 vol0/be01fs04 \\filer\fs02_bak\.snapshot vol0/be01fs02 All of them are copied to tape, but only home has incremental smaller than full backups. Any ideas what to check, or why one should work and not the others. Obviously this using a lot more taps and bandwidth than required. Thanks, Chris Algar

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RE: Incremental backup of snapshots
by Muhlestein, Mark 14 Mar '00

14 Mar '00

Snapshots are read only. That means the backup app can't clear the DOS archive bit. It sounds like the solstice backup app is using the archive bit. If they were using the times on the files it would work. Incremental mode should work on the live filesystem. Mark Muhlestein -- mmm(a)netapp.com -----Original Message----- From: Christopher Algar [mailto:christopher.algar@s1.com] Sent: Tuesday, March 14, 2000 9:02 AM To: toasters Subject: Incremental backup of snapshots Have a backup problem using Solstice backup 5.1.1 - Legato networker in drag. I'm backing up the ntfs qtrees of an F760 by adding \\filer\share\.snapshot\nightly.0 to the client save sets on an nt server running the solstice backup client. We have 3 qtrees backed up in this way, all within the same volume, ntfs security style and oplocks enabled. Share Qtree \\filer\home\.snapshot\nightly.0 vol0/home \\filer\fs04_bak\.snapshot\nightly.0 vol0/be01fs04 \\filer\fs02_bak\.snapshot vol0/be01fs02 All of them are copied to tape, but only home has incremental smaller than full backups. Any ideas what to check, or why one should work and not the others. Obviously this using a lot more taps and bandwidth than required. Thanks, Chris Algar

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Incremental backup of snapshots
by Christopher Algar 14 Mar '00

14 Mar '00

Have a backup problem using Solstice backup 5.1.1 - Legato networker in drag. I'm backing up the ntfs qtrees of an F760 by adding \\filer\share\.snapshot\nightly.0 to the client save sets on an nt server running the solstice backup client. We have 3 qtrees backed up in this way, all within the same volume, ntfs security style and oplocks enabled. Share Qtree \\filer\home\.snapshot\nightly.0 vol0/home \\filer\fs04_bak\.snapshot\nightly.0 vol0/be01fs04 \\filer\fs02_bak\.snapshot vol0/be01fs02 All of them are copied to tape, but only home has incremental smaller than full backups. Any ideas what to check, or why one should work and not the others. Obviously this using a lot more taps and bandwidth than required. Thanks, Chris Algar

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SQL Server 7 and I/O error 59
by Jack Verdirame 14 Mar '00

14 Mar '00

Hello, We are running into an issue with the TCP/IP stack on an NT SQL Server machine over multi-gigabit ports. We have tried eliminating ports, reconfiguring and the error never seems to go away. We have not seemed to isolate the problem other then it seems to be the NT machine. We see no errors in the etc/messages and the interfaces seems to be running flawlessly (246 million packets and only 10 errors, 27 CRC's). We have seen only a few CP to CP but never when the problem occurs. We currently are simulating approx 20 - 40 meg of traffic over 2 gig cards using the test software that comes with SQL server 7. It is built on the traffic simulator and load generator IOMeter. The filer seems to be running great - 11,000 + ops per second without a problem. Any ideas or things to look for would be helpful. I have found some problems with NT and the net use command and found a service pack but it was for terminal server. The error was an I/O error 59 problem with tearing down multiple TCP sessions over UNC path mapped file transfers. Thanks for your time, Jack Verdirame www.zerowait.com www.loadbalancing.net Las Vegas: 302.559.5962 Corp: 302.266.9408

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problem in .profile
by bhaskar.g＠philips.com 13 Mar '00

13 Mar '00

Hi, We started creating user accounts with their home folders on the filer 720. But the new users are unable to set the environment as they login. The problem is the terminal doesnot read the .profile in the home folder though .profile exists and the user owns it. But when we remsh to some other system or the same system the .profile is working. When the user logs in from the Xterm this problem occurs. Please let us know what is the problem. regards Bhaskar G Systems Engineer, Philips Semiconductors, #3, Sterling Square,Madras Bank Road, Off St Mark's Road,BANGALORE-560 001. Voice : +91 80 222 9200 Ext 5060 Fax: +91 80 2229700

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