toasters April 2001

toasters@lists.teaparty.net

205 participants
286 discussions

Netbackup and tape compression
by Clawson, Simon 09 Apr '01

09 Apr '01

HI Is anyone using Netbackup with tape compression at the DLT drive? Our DLT 7000 will write at faster speeds with compression on, but we dont use it. Is there any reason why we cannot if we use Netbackup to control the write and restore operation? Simon Simon Clawson HDS Team Systems Administrator Mentor Graphics Uk Rivergate London Road Newbury Berkshire RG14 2QB <<Clawson, Simon.vcf>>

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RE: Block checksum and Zone checksum drive
by Brookes, Matt 09 Apr '01

09 Apr '01

Max, Benefits: ZCS and BCS drives both offer the added reliability of checksums, which allow WAFL to confirm that the data a hard-drive returns is what was written to in in the first place. BCS drives are formatted to allow this checksum to be stored with the data, rather than in a separate block, so BCS drives offer the same protection but with potentially increased performance, depending on workload. Limitations: BCS drives can be used in ZCS volumes but will be treated as a ZCS drive. A filer with BCS volumes must use DOT6.0.1 or above and cannot be reverted to 5.x BCS drives CANNOT be used on pre 6.0.1 filers. Other Questions: A FAQ on Zoned and Block Checksums using Data ONTAP OS 6.0.1 may be found in the NOW knowledge base: http://now.netapp.com/Knowledgebase/solutionarea.asp?id=ntapcs753 Regards, Matt. > -----Original Message----- > From: max chan [mailto:maxchan0@yahoo.com] > Sent: 06 April 2001 10:48 > To: toasters(a)mathworks.com > Subject: Block checksum and Zone checksum drive > > > Dear all, > > Is there any different for Block checksum and Zone > checksum drive? in term of preformance, reliability, > limitation etc.. If i use ontap 6x, which one should i > chose? > > Max > > __________________________________________________ > Do You Yahoo!? > Get email at your own domain with Yahoo! Mail. > http://personal.mail.yahoo.com/ >

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RE: Data Copy from Filer to Filer
by Israel, Meital 09 Apr '01

09 Apr '01

Jessica, It depends of the type of data you wish to copy: If you need to copy NFS (Unix) from filer to filer, it will be better to copy it via Unix host, using tar command (be carefull not to copy the .snapshot dir). If you need to copy CIFS files, you can use the vol copy (I think you can copy from filer to filer with this) or you can use a copy utility found in NOW web site (I don't remember the name of it). Good Luck! ************************************** Meital -----Original Message----- From: Jessica Fernandez [mailto:jasf@lanl.gov] Sent: Friday, April 06, 2001 23:23 To: toasters(a)mathworks.com Subject: Data Copy from Filer to Filer What are your recommendations of copying data from one filer to another? I have estimated time of 28 hours to transfer 70 GB via a copy command on the host machine. I have tried to copy via CIFS accessing from NT servers using drag and drop. Encountered errors which halted the copy process due to files that were linked to incorrect locations. Unix files in the users desktop were linked to other machines and the path was invalid. Did a grep to locate these linked files in the user folders, and found too many to change one by one. The vol copy command is only useful when copying from volume to volume on the same filer, correct? I am looking for the most efficient way to move data. Any suggestions would be great! Jessica JESSICA A. S. FERNANDEZ ESA-FM Facility Management E-mail: jasf(a)lanl.gov TA-16-661-101, MS-C933 Voice: 505-665-8051 Los Alamos National Laboratory Pager: 104-6707 Los Alamos, New Mexico 87545 FAX: 505-665-9490

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RE: reducing getattr's
by Traitel, Eyal 08 Apr '01

08 Apr '01

Kevin, For Solaris, look at <http://docs.sun.com/ab2/coll.707.1/SOLTUNEPARAMREF/@Ab2PageView/8183?DwebQu…> This is from docs.sun.com, Solaris Tunable Parameters Collection , Solaris Tunable Parameters Reference Manual The default of the kernel flag nfs:nfs3_lookup_neg_cache is 1 - DO cache negative lookups on mounted NFS servers. Hope it helps, Eyal. ---------------------------------------------------------------------- eTraitel - I'm the new eBuzzword around !!! ---------------------------------------------------------------------- Eyal Traitel - Filer Escalation Engineer CNA, MCSE, CSA, LCA, NetApp CA Network Appliance BV Holland Office Center Kruisweg 799b 2132 NG, Hoofddorp The Netherlands Office: +31 23 567 9685 Cellular: +31 6 5497 2568 Email: eyal(a)netapp.com ---------------------------------------------------------------------- Get answers NOW! - NetApp On the Web - http://now.netapp.com ---------------------------------------------------------------------- -----Original Message----- From: kevin graham [mailto:kgraham@dotnetdotcom.org] Sent: Sunday, April 08, 2001 5:00 AM To: toasters(a)mathworks.com Subject: reducing getattr's Slightly OT, as it isn't directly netapp related, but does anyone know of a way to test if a file exists in Solaris besides a full-fledged stat() or attempting an open? I'm looking through web server stats, and I noticed I'm spending most of my nfs time doing getattrs, which I presume map back to stats that (mostly) test for existance. It strikes me that a getattr is rather painful in contrast to a lookup, but I have no idea how (or if) if the lesser can be forced. I've toyed with the idea of increasing actimeo and friends up, but am not sure of all the caveats of doing so (namely, are negative entries cached? I'm thinking along the lines of DNS's NXDOMAIN cachine semantics .. false positives would be OK, but the false negatives would be baaad). Ideas? Thanks. ..kg..

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RE: Data Copy from Filer to Filer
by Knight, Graham 07 Apr '01

07 Apr '01

Ndmpcopy version 2 doesn't require command line passwords. It prompts for the passwords when the session starts. The source is available on the ndmp.org website. I haven't played with it, but it looks interesting. For version 1 you can hardcode the password and compiled it down to a binary that only root can read or execute. That stops people from being able to find the password from the executable unless they are the root user. It worked pretty well when I did this at my previous job. All you have to do is add default passwords in the main.h file. Hardcode the filer passwords in the DEF_SRC_AUTH_PASSWORD and DEF_DEST_AUTH_PASSWORD definitions and recompile. It really helps if all you filers have the same password. :-) Graham -----Original Message----- From: Brian Tao [mailto:taob@risc.org] Sent: Saturday, April 07, 2001 8:00 AM To: Francett, Robert D (SAIC) Cc: 'Jessica Fernandez'; toasters(a)mathworks.com Subject: RE: Data Copy from Filer to Filer On Fri, 6 Apr 2001, Francett, Robert D (SAIC) wrote: > > The form I use is: > $ ndmpcopy filer1:/vol/volname/qtree filer2:/vol/volname/qtree -sa root:password -da root:password -dhost GbE_IP_address -level 0-9 This is the greatest failing of ndmpcopy... plaintext passwords to privileged accounts on the command line, in your shell history, up there in a "ps" for everyone to see, etc. It would be nice to have an "ndmp" user on the filer that can *only* initiate or receive NDMP sessions. Combine that with a new ability to read user/password information from a file in ndmpcopy, and you at least have some modicum of security. One of these days, I'll hack ndmpcopy to do that... unless someone else has done that already. ;-) -- Brian Tao (BT300, taob(a)risc.org) "Though this be madness, yet there is method in't"

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RE: Filer Serial Connectivity
by Joe Luchtenberg 07 Apr '01

07 Apr '01

Please forgive the ignorance of a sales guy lurking an engineers' discussion list... Why would you want this type of solution instead of/in addition to FilerView? Granted, FilerView is network-bound (correct?), but if you need to dial in under a complete network outage wouldn't any RAS/terminal server solution do? (I'd be concerned about security issues with my filer console ports connected indirectly to a modem, though.) For those familiar with other remote management solutions, how does NetApp's remote manageability compare with, say, Compaq's Remote Insight Board Lights Out Edition? TIA. Joe Joe Luchtenberg Dataline, Inc. 757.858.0600 757.285.1223 (cell) 757.858.0606 (fax) joe.luchtenberg(a)data-line.com www.data-line.com -----Original Message----- From: Ronan Mullally [mailto:ronan@online.ie] Sent: Monday, April 02, 2001 12:29 PM To: Martin Hughes Cc: 'toasters(a)mathworks.com' Subject: Re: Filer Serial Connectivity On Mon, 2 Apr 2001, Martin Hughes wrote: > We have 4 clustered F840Cs in our environment. As a backup connection > method, we're looking at some type of terminal server that we can connect > the filers to that will present the filers serial ports as IP addresses that > we can connect to , in order to view the bootup messages etc, with a modem > hookup in case of complete network failure. Does anyone else out there have > any recommendations on make/model of equipment? We're using a Linux box with a Cyclades multiport serial card and a utility called 'conserver'. The Cyclades card will connect to up to 64 devices. Conserver allows multiple users access the console ports of the various devices over the network and logs every character that traverses the console connection to local disk. The hardest part of the whole thing was figuring out the pin-outs for each device... -Ronan

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RE: Data Copy from Filer to Filer
by Francett, Robert D (SAIC) 07 Apr '01

07 Apr '01

Jessica, ndmpcopy, at the command line of a UNIX admin host works very well, particularly if you have a GbE (Gigabit Ethernet) connection for filer to filer data migration at any level - volume or qtree, even data from one location to another on the same filer. The form I use is: $ ndmpcopy filer1:/vol/volname/qtree filer2:/vol/volname/qtree -sa root:password -da root:password -dhost GbE_IP_address -level 0-9 ndmpcopy is downloadable, compiler for Sun, from the site: http://www.ndmp.org/ <http://www.ndmp.org/> If you have a license, SnapMirror works really well too, but at the volume level. More to setup but less impact if outage is required. Bob Francett BP Exploration (Alaska) -----Original Message----- From: Jessica Fernandez [mailto:jasf@lanl.gov] Sent: Friday, April 06, 2001 1:23 PM To: toasters(a)mathworks.com Subject: Data Copy from Filer to Filer What are your recommendations of copying data from one filer to another? I have estimated time of 28 hours to transfer 70 GB via a copy command on the host machine. I have tried to copy via CIFS accessing from NT servers using drag and drop. Encountered errors which halted the copy process due to files that were linked to incorrect locations. Unix files in the users desktop were linked to other machines and the path was invalid. Did a grep to locate these linked files in the user folders, and found too many to change one by one. The vol copy command is only useful when copying from volume to volume on the same filer, correct? I am looking for the most efficient way to move data. Any suggestions would be great! Jessica JESSICA A. S. FERNANDEZ ESA-FM Facility Management E-mail: jasf(a)lanl.gov TA-16-661-101, MS-C933 Voice: 505-665-8051 Los Alamos National Laboratory Pager: 104-6707 Los Alamos, New Mexico 87545 FAX: 505-665-9490

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RE: BudTool transition news
by Cormier, Darleen 07 Apr '01

07 Apr '01

To Marion and any other Budtool users on this list. NetApp received this offical notification from Legato just this week, on the new migration policy. As we understand it Marion, it is available now. -----Original Message----- From: Marion Hakanson [mailto:hakanson@cse.ogi.edu] Sent: Friday, April 06, 2001 6:30 PM To: toasters(a)mathworks.com Subject: BudTool transition news Folks, Dunno if it's top secret, or what, but this week I innocently (hah!) asked Legato about transferring my BudTool license to a new NetApp that may be coming in soon. Their website says host transfers are free, so what the heck? Anyway, instead of getting an answer, I got directed to my local Legato salesperson, who informed me that they've finally come to their senses and are offering a one-for-one exchange to replace our BudTool products with equivalent NetWorker products, at no cost other than putting it all back on tech-support contract. I checked, and it's not 1-April-2001. Maybe by the Mayan calendar? By my investigation so far, NetWorker-6.1 claims it will do everything our BudTool-4.6.1 does, with the exception of: (1) NDMP backup to non-NetApp tape drive. An extra-cost SnapImage option turns your Networker tape host into an NDMP tape server to provide this functionality. OK, so it's not quite 1-for-1. (2) Cloning NDMP tapes. They say that'll be along soon (I forgot to ask if I could do that with SnapImage). But one can do a second backup to offsite media to partially work around this limitation. I'm still not wild about Networker, but "Free is a very good price." Well, not counting the initial $30k investment in BudTool, anyway. So, has anyone else heard about this? I could find no mention of it (nor any previous transition programs) on their website. Regards, -- Marion Hakanson <hakanson(a)cse.ogi.edu> CSE Computing Facilities

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RE: Data Copy from Filer to Filer
by Knight, Graham 07 Apr '01

07 Apr '01

Hi Jeff, I'm curious, what are the issues that stop you from using ndmpcopy? Graham -----Original Message----- From: Jeff Kennedy [mailto:jlkennedy@amcc.com] Sent: Friday, April 06, 2001 4:32 PM To: Jessica Fernandez Cc: toasters(a)mathworks.com Subject: Re: Data Copy from Filer to Filer I would imagine the most efficient method is to use snapmirror. However, if you have the problem I do which is wanting to copy specific data from one volume to another you use something like ndmpcopy. My particular case is special and ndmpcopy doesn't work for me either due to filesystem fragmentation so rsync is my only option. ~JK Jessica Fernandez wrote: > > What are your recommendations of copying data from one filer to > another? > > I have estimated time of 28 hours to transfer 70 GB via a copy command > on the host machine. > > I have tried to copy via CIFS accessing from NT servers using drag and > drop. Encountered errors which halted the copy process due to files > that were linked to incorrect locations. Unix files in the users > desktop were linked to other machines and the path was invalid. Did a > grep to locate these linked files in the user folders, and found too > many to change one by one. > > The vol copy command is only useful when copying from volume to volume > on the same filer, correct? > > I am looking for the most efficient way to move data. > > Any suggestions would be great! > > Jessica > > JESSICA A. S. FERNANDEZ ESA-FM Facility Management > E-mail: jasf(a)lanl.gov TA-16-661-101, MS-C933 > Voice: 505-665-8051 Los Alamos National Laboratory > Pager: 104-6707 Los Alamos, New Mexico 87545 > FAX: 505-665-9490 -- ===================== Jeff Kennedy Unix Administrator AMCC jlkennedy(a)amcc.com

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RE: Data Copy from Filer to Filer
by Knight, Graham 07 Apr '01

07 Apr '01

Hi Jessica, ndmpcopy is a great way to go. There are compiled versions on the NOW site, and the source code is on the ndmp.org site. ndmpcopy starts a dump on one filer and pipes it directly to a restore on another filer (or the same filer). It can be done on a directory level. It will preserve all of your unix permissions and NT ACL's when making the copy. It is also a much faster way to transfer data because there is no intermediate machine involved in the transfer. Yes, volcopy will only copy entire volumes. Graham -----Original Message----- From: Jessica Fernandez [mailto:jasf@lanl.gov] Sent: Friday, April 06, 2001 3:23 PM To: toasters(a)mathworks.com Subject: Data Copy from Filer to Filer What are your recommendations of copying data from one filer to another? I have estimated time of 28 hours to transfer 70 GB via a copy command on the host machine. I have tried to copy via CIFS accessing from NT servers using drag and drop. Encountered errors which halted the copy process due to files that were linked to incorrect locations. Unix files in the users desktop were linked to other machines and the path was invalid. Did a grep to locate these linked files in the user folders, and found too many to change one by one. The vol copy command is only useful when copying from volume to volume on the same filer, correct? I am looking for the most efficient way to move data. Any suggestions would be great! Jessica JESSICA A. S. FERNANDEZ ESA-FM Facility Management E-mail: jasf(a)lanl.gov TA-16-661-101, MS-C933 Voice: 505-665-8051 Los Alamos National Laboratory Pager: 104-6707 Los Alamos, New Mexico 87545 FAX: 505-665-9490

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toasters April 2001