toasters August 1999

toasters@lists.teaparty.net

104 participants
129 discussions

SUMMARY: really bad NFS write performance but NFS reads are OK
by Matt Harrington 26 Aug '99

26 Aug '99

the fix was simple. i didn't realize that things were set up for synchronous writes. once i set it to asynchronous mode, write performance skyrocketed. to Bruce: the performance of this box is quite good actually. NetApp isn't the only game in town. i sent my question to this list because from time to time people talk about systems from auspex, emc, and many others. ---matt

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Re: really bad NFS write performance but NFS reads are OK
by sirbruce＠ix.netcom.com 26 Aug '99

26 Aug '99

On 08/26/99 11:37:05 you wrote: >what could be causing this poor NFS write performance? The fact that the NAS box is from Western Scientific and not a Netapp filer? Bruce (wondering what this mail is doing on this list)

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really bad NFS write performance but NFS reads are OK
by Matt Harrington 26 Aug '99

26 Aug '99

I have a NAS device on eval which performs well with NFS reads but not with NFS writes. I can read at about 9 MByte/sec (or faster) with certain NFS clients but I can only write at 0.22 MByte/sec from any client. nfsstat looks fine -- no badcalls. here is the setup: - RAID5 NAS device (from Western Scientific) 218GB - Alteon gigabit ethernet NIC - NFS version 2 - clients mostly run Irix 6.5 but there are a few Alphas running DU 4.0E and a Linux box running RH6 (kernel 2.2.5-15). - clients are on 100baseT - NAS box is connected to a Baystack 350-24T switch with a gigabit uplink module what could be causing this poor NFS write performance? matt harrington 415-476-4628

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Re: NDMP and Security
by Steve Kappel 26 Aug '99

26 Aug '99

>We have a UNIX machine running Netbackup. It is initiating backups to >locally attached tapes drives on our filer. Can anyone explain how the filer >knows it's supposed to allow the UNIX host to initiate backups? I would >assume the machine/userid pair would need to be in the hosts.equiv before >this would work. However, backups are working without this entry. How does >security work with NDMP? The command set_ndmp_attr is used to set the password for the filer. Usage: set_ndmp_attr -auth ndmp_server username set_ndmp_attr -robot ndmp_server robotic_device robot_ctrl scsi_id logical_unit_number set_ndmp_attr -list The password is stored in an encrypted format. During NDMP authentication, the password will be sent to the filer either as clear text (NetBackup 3.1.1 or if the filer doesn't support MD5) or a MD5 digest. __________________________________________________________________________ Steve Kappel steve.kappel(a)veritas.com VERITAS Software steve.kappel(a)iname.com (Personal)

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Copying small directory on netapp
by Stephen C. Losen 26 Aug '99

26 Aug '99

We are using our netapps for home directories in a mixed NFS and CIFS environment. We have a prototype new user directory that we set up with some unix "dot" files, a public_html directory, etc. Most of our CIFS users never touch unix, so from CIFS we make the unix dot files hidden. We do this in the hope that they won't delete them and then later on give unix a try and have problems when their account doesn't behave as documented. We use the netapp dump program to dump the prototype directory to a disk file. We create new accounts from unix. We make a new user directory and populate it with netapp restore. Then we chown all the files to the new user. This works great because it preserves the "hidden" attribute on all the "dot" files. Unfortunately, the netapp dump utility writes all the inode information for the entire filesystem to the dump file. So our little prototype directory, which tars into a file of about 20K, dumps into a 2.5M file. This really slows down bulk user adds, because it takes several seconds for each restore to run. Not a surprise when you have to rsh over 2.5M. We added 4700 accounts for our new incoming students and it took about a day -- almost all of the time taken up by restore. And yes, we dump once to file, and do multiple restores from it. I suppose I could build a very small and empty netapp filesystem and put the prototype in there and dump it. That would certainly reduce the size of the dump, but that's an impractial waste of resources. So here are my questions: 1) Is there some way other than dump/restore to copy a directory on a netapp that preserves all NFS and CIFS attributes? 2) We are running 5.2.2P1 and I don't see any dump flags that avoid including all the inode info in the dump. Am I missing something? 3) Is there a way from unix to set the CIFS hidden attribute? If so, I would just use tar and set the attribute. Steve Losen scl(a)virginia.edu phone: 804-924-0640 University of Virginia ITC Unix Support

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RE: Copying small directory on netapp
by Benn, Paul 25 Aug '99

25 Aug '99

Hello Steve, Perhaps this has been answered already.... Anyway, you can also do this by using an NT based backup application (backing up over CIFS). I published a white paper detailing this: http://www.netapp.com/tech_library/3052.html Best Regards, Paul -----Original Message----- From: Stephen C. Losen [mailto:scl@sasha.acc.virginia.edu] Sent: Tuesday, August 24, 1999 8:23 AM To: toasters(a)mathworks.com Subject: Copying small directory on netapp So here are my questions: 1) Is there some way other than dump/restore to copy a directory on a netapp that preserves all NFS and CIFS attributes?

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NDMP and Security
by grdodson＠lexmark.com 25 Aug '99

25 Aug '99

NDMP requires the client to know the password to the NetApp. Depending on the implementation it is either sent in the clear or as a hash from the client to the NetApp during authentication. Graydon Dodson ----- Begin Included Message -----

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RE: NDMP and Security
by Davis, John 25 Aug '99

25 Aug '99

I recently assisted our Veritas resellar technician setup Netbackup on a pair of filers that I installed; the Sun Workstation served as the filers admin host as well as the NDMP "server/controller"; in addition to having the hosts.equiv entry which the filer admin host is in by default, she ran an authentication script like: "set_auth_ndmp toaster root" which then prompts for the filers password...sooooo, I would assume someone at some point in time set the authorization on your unix machine.. -----Original Message----- From: Sean Hinchey [mailto:skh@nortelnetworks.com] Sent: Wednesday, August 25, 1999 11:38 AM To: 'toasters(a)mathworks.com' Subject: NDMP and Security We have a UNIX machine running Netbackup. It is initiating backups to locally attached tapes drives on our filer. Can anyone explain how the filer knows it's supposed to allow the UNIX host to initiate backups? I would assume the machine/userid pair would need to be in the hosts.equiv before this would work. However, backups are working without this entry. How does security work with NDMP? -Sean

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FW: Legato ClientPak for NetApp
by Yu, David 25 Aug '99

25 Aug '99

Re-submitting to toasters(a)mathworks.com . ------------------------------ > The Legato ClientPak for NetApp was announced yesterday. > > Please see: > > http://biz.yahoo.com/bw/990824/ca_legato__2.html > > for details. The ClientPak, which is a Java-based, non-NDMP solution, > will be available in September. The ClientPak is compatible with > Networker Server and Storage Node and backs up over the network. > > Obviously, Legato has invested heavily in NDMP, so it has a prominent > role in Legato's strategy. The Java ClientPak provides a solution right > now for Networker customers. > > Legato plans to provide a complementary NDMP-based Networker solution for > NetApp early next year. > > David >

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NDMP and Security
by Sean Hinchey 25 Aug '99

25 Aug '99

We have a UNIX machine running Netbackup. It is initiating backups to locally attached tapes drives on our filer. Can anyone explain how the filer knows it's supposed to allow the UNIX host to initiate backups? I would assume the machine/userid pair would need to be in the hosts.equiv before this would work. However, backups are working without this entry. How does security work with NDMP? -Sean

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toasters August 1999