toasters June 2001

toasters@lists.teaparty.net

115 participants
141 discussions

Backup: Tape Libraries
by Puneet Gulati 08 Jun '01

08 Jun '01

Hi All, I just bought a F840 with 300gb usable but our growth rate is pretty rapid. One year from today the expected space usable will touch 1.5 TB. I am looking at two products for backup (using Veritas Netbackup 3.4/ data center running on a Sun Solaris 220R) that can handle it properly with good support and technology. This is what I short listed 1. Adic Scalar 100 with AIT II Tape drives. 4 drives( 2 drives for reserved for Netapp and 2 for other stuff ....) 2. Spectra … [View More]

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RE: Moving data from one volume to another
by Robert.Sabo＠ecomm.bc.ca 07 Jun '01

07 Jun '01

> o "Level i" copies will *not* work with level 0-9 copies of > the same source > and destination. That is, you cannot do a "-level 0" > ndmpcopy to move > data initially, then use "-level i" to make updates. For > that matter, you > can't use any other method to do the initial copy such as > "vol copy", > dump/restore, rsync, etc. If you want to use "-level i" at > all, you must > use it to do the initial copy in addition to all updates > (… [View More]

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SQL Server Performance Problem on Filer
by Dale Wolf 07 Jun '01

07 Jun '01

In case anyone remembers I wanted to let you know our local NetApp System Engineer discovered flow control was turned off for our environment. Once the network setting was changed we started getting better performance. Testing is continuing. I want to extend my thanks to all of you who replied to my email earlier in the week.

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RE: Moving data from one volume to another
by Robert.Sabo＠ecomm.bc.ca 07 Jun '01

07 Jun '01

> In my experience, the quickest way to move whole volumes > within a filer is vol copy. There seem to be several concerns with using 'vol copy' in our situation: 1. The downtime - judging from our previous experience with 'vol copy', around 2 hours would be required to move 45 Gigs of data. 2. Someone has pointed out that 'vol copy' would not work in situation where the source and the destination volumes have different number of hard drives and different RAID group sizes. > If you … [View More]

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Re: Backup: Tape Libraries
by ilya.birman＠abnamro.com 07 Jun '01

07 Jun '01

Puneet, We using StoraeTek L 700 with 4 fiber attached 9840 tape drives ( StorageTek claims that their are the fastest on the market (?) ) Tape drives and NetApp and the SunBox 220r running NetBackup 3.4 are connected to a Brocade fiber switch. We have set up 3 zones on the switch with @ tape drives visible to SUN box ( for other backups) and other 2 tapes drives visible only to two NetApps. Runing NDMP backup, excellent throughput, after 6.1R no issues. Since each of the NetApp have a … [View More]

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Dumb and possibly impossible question
by Edward Hibbert 07 Jun '01

07 Jun '01

I'm having difficulty accessing NOW just now, so forgive me if a) this is on there or b) it's a stupid question. I'm debugging a client-side problem, using pktt trace from the NetApp. To assist with this I want to be able to go from the file handles I which I see in the pktt trace to a filename on the client. Normally I would try to to ls -i on the client to find an inode and work from there, but I'm not sure if that makes sense in a NetApp context. Any pointers? Edward Hibbert Internet … [View More]

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Experiences with running filers over WAN
by Roger Lindell 07 Jun '01

07 Jun '01

Hello, I wonder if anyone out there has any experiences with running filers over WAN. We are thinking about placing a filer about 600 Km from the users in a move to centralize the storage. The users would be connected via dual 622 Mbps ATM connection so the transfer speed should be OK but the question is if the latency would be acceptable and also how many users could you usefully have at the remote site. The filer would be running both CIFS and NFS. Regards, Roger Lindell

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RE: Moving data from one volume to another
by Fox, Adam 07 Jun '01

07 Jun '01

In my experience, the quickest way to move whole volumes within a filer is vol copy. If you need incremenal support, then SnapMirror also works great. The only downside to SnapMirror is it isn't free. But do you really need "infinite incrementals" I mean you should be able to do it with minimal downtime with only a few levels. Even if you did 1 incremental per day for a week before doing the final incremental with downtime, you should be able to fit within 10 levels of incrementals. How … [View More]

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RE: Sudden CIFS performance degradation
by Nail, Larry 07 Jun '01

07 Jun '01

What kind of connections do you have? SQL, WTS, or just regular file shares? -----Original Message----- From: Dianna Mullet [mailto:drmullet@link.com] Sent: Thursday, June 07, 2001 10:01 AM To: toasters(a)mathworks.com Subject: Sudden CIFS performance degradation We're running OnTap 5.3.6 on an F760, serving both NFS and CIFS. It ran fine since we upgraded to 5.3.6 around 10 months ago, until early this week, when we began experiencing severely degraded CIFS performance. In some cases, … [View More]

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Re: Changing UIDs on LOTS of files
by Steve Losen 07 Jun '01

07 Jun '01

Someone (sorry, deleted message) pointed out that perl's chown() call probably follows symlinks, and that is indeed the case. However, there is a very simple workaround for that: find dir ! -type l -print | mychown.c Also, as someone pointed out, if you use chown -R you also want to use -h (if your unix flavor supports that option) to change the owner of the symlink itself rather than what the symlink points to. > > If you run a separate chown process for each file, yes, that will be … [View More]

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toasters June 2001