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13514 discussions

unix style to ntfs and back
by neil lehrer 24 Jan '02

24 Jan '02

hi, i have a question about security style reversion. we converted a unix qtree to ntfs and applied acls. there was a problem and i had to revert back to the unix style almost immediately after creating the acls. now i want to convert the same qtree to ntfs again. the question is will the acls that i originally put in place still be there after i convert to ntfs? the unix perms were there when i went ntfs back to unix, but it may not be the same going from unix to ntfs. anybody ever seen or done this? ontap 6.1.1r2 thanks. -- regards

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"Open files" in NetApp shapshots
by Joseph Foy 23 Jan '02

23 Jan '02

I am running a Network Appliance Filer and using CA ARCserve to backup files on a Windows 2000 network. All file access is working fine, and ARCserve seems to be backing up files on all other Windows systems OK. My problem is that ARCserve keeps reporting skipping (some)open or locked files even though I am backing up a snapshot (usually the last hourly.0 snapshot). Any thoughts on why ~snapshot\hourly.0 isn't acting as a read-only filesystem? Joseph Foy/Sys Admin/World Wide Packets/Beaverton Oregon

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RE: Gigabit ethernet performance
by Surlow, Jim 23 Jan '02

23 Jan '02

May, One course I took at USENIX over a year ago, there was a comment from the system & network tuning course that said that it would take 3 CPUs (Sparc 300MHz) to saturate a GBIC. This was an unverified rule of thumb at the time. (I went back to my notes to dig this up). These days, you would have faster buses and faster CPUs, so adjust the number downward accordingly. In the case of the mkfile that process is going to be designated to a single CPU. Just for fun, you might want to fire up 4 simultaneous 256m (both to tmp & to your filer) to see if you see performance differences. That way, you would be able to isolate some of the time to the limitations of your NFS client. The back-to-back CPs are going to be in your sysstat output (use 1 sec updates for longer that 10 seconds). And that will identify time that the filer is spending on disk I/O. If you are getting back-to-back CPs, then your filer's NVRAM cache is filling faster than it can flush to disk. So, the filer makes the data stream wait. If you were to run the same single processor mkfile test with less data, you should see time to tmp would be proportional and if your time to filer is less than the earlier filer ratio (time/disk), then that might also show that it is a lack of NVRAM cache. Jim -----Original Message----- From: Hsueh-Mei Tsai(May Tsai) [mailto:may-tsai@ti.com] Sent: Tuesday, January 22, 2002 12:38 PM To: toasters(a)mathworks.com Subject: Re: Gigabit ethernet performance Thanks for all the replies. Some background info: Sun client is a 420R running Solaris7, NetApp is F820 running 6.1.1R2. Both are PCI cards. I've checked the NOW sites and tried to change various Sun parameters with no significant differences. Local disk creation takes 35 secs(single drive) vs. NetApp's 7 data/1 parity volume, which produces ~30secs results. Direct tmpfs writes takes 8 secs. Aggregated results in 27.5 seconds, still not much better though. The NetApp support engineer I worked with mentioned it's back-to-back CP bottleneck, that's not on the network side, correct? Does that mean the Netapp F820 can't handle consistent huge data flows? As to Jumbo frame, I haven't tried it yet, the Gbit switch I use probably won't support it, well. Does it adds a lot to the performance? May

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RE: Repost: wafl scan question
by jwitham＠takedapharm.com 23 Jan '02

23 Jan '02

In our case, it's an exploding M$ Exchange Information store... It started out on 2 36G disks, now it's up to 4. Mailbox quotas must be nice... I was turned on to the wafl commands by one of our local PSE's last week, we were having horrible performance reported while our Exchange snapshot verifications were running. A statit showed 1 disk at 100% activity, and the next one at 66%. I ran a 'wafl scan measure_layout', and got: wafl_filesystem_sca:info]: WAFL layout ratio for volume vol7 is 4.87. (A ratio of 1 is optimal). So, I run a 'wafl scan reallocate vol7', let it chug for an hour, then run another 'wafl scan measure_layout', and it's still 4.87 :( I've done this twice now, with no change in waffling. We're running 6.1.2. At the advice of my PSE, I'm opening a ticket with NOW. John Witham Sr. Data Networking Engineer Takeda Pharmaceuticals North America, Inc. e://jwitham@takedapharm.com V://847.383.3304 F://847.383.3205 A computer lets you make more mistakes faster than any invention in human history, with the possible exceptions of handguns and tequila. -Mitch Ratcliffe -----Original Message----- From: barry(a)lustig.com [mailto:barry@lustig.com] Sent: Wednesday, January 23, 2002 12:15 PM To: Matt Musgrove Cc: Jeff Kennedy; NDMP List Subject: Re: Repost: wafl scan question This sounds like it would be useful for volumes that started out with low performance needs with a small number of disks in the array that ended up with large raid sizes. I imagine that files would get striped across the larger number of drives after the reallocate. barry On Wednesday, January 23, 2002, at 02:00 AM, Matt Musgrove wrote: >> From my ONTAP course notes: > > wafl scan reallocate takes a volume or file and reallocates it on the > disk to > increase its layout efficiency (ie. defrags). However, you should only > run > this command on the advice of NetApp. It should only be run if volume > capacity is <80% and during a non-peak period (filer impact similar to > a vol > copy command). > > hope that helps > > Matt Musgrove > > Jeff Kennedy wrote: > >> Don't know if this didn't get through or what so I'm reposting. >> >> Thanks. >> >> Jeff Kennedy wrote: >>> >>> What exactly does 'wafl scan reallocate' do? Does it actually >>> re-write >>> data in a more efficient manner/layout? Or does it redo inodes and >>> pointers in a more efficient layout without moving data? >>> >>> I know that a reallocate is unnecessary if the measure_layout is low >>> (most of mine are under 2) but on occassion I get higher numbers and >>> wonder what it does to fix this. >>> >>> Thanks. >> -- >> ===================== >> Jeff Kennedy >> Unix Administrator >> AMCC >> jlkennedy(a)amcc.com > This message is for the designated recipient only and may contain privileged or confidential information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited.

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wafl scan question
by Jeff Kennedy 23 Jan '02

23 Jan '02

What exactly does 'wafl scan reallocate' do? Does it actually re-write data in a more efficient manner/layout? Or does it redo inodes and pointers in a more efficient layout without moving data? I know that a reallocate is unnecessary if the measure_layout is low (most of mine are under 2) but on occassion I get higher numbers and wonder what it does to fix this. Thanks. -- ===================== Jeff Kennedy Unix Administrator AMCC jlkennedy(a)amcc.com

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RE: Veritas Netbackup mailing list
by Melvin, Grant 23 Jan '02

23 Jan '02

Hi Jan, Check out: Veritas-bu maillist - Veritas-bu(a)mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu Cheers, Grant For information on NetApp's Data Protection Solutions view http://www.netapp.com/solutions/data_protection.html. -----Original Message----- From: Schepers, Jan [mailto:Jan.Schepers@atosorigin.com] Sent: Wednesday, January 23, 2002 2:15 AM To: toasters(a)mathworks.com Subject: Veritas Netbackup mailing list Hello list, is there a Veritas Netbackup mailing list as there is a Legato Networker list on http://listmail.temple.edu/archives/networker.html regards, Jan

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F230 6.1.1R2 upgrade ?
by Frank Bonnet 23 Jan '02

23 Jan '02

Hi We have a F230 running Ontap 5.3.2 Should I safely upgrade it to 6.1.1R2 ? Thanks -- Frank Bonnet

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Refurbish Filers
by Ali Maula Ali Mauli Ali DamDam 23 Jan '02

23 Jan '02

Hi guyz, I'm just wondering,is there any way to get refurbished filers.Becoz,we thinking of purchasing old filers e.g. f720,f740 for our own internal trainings. thx, rgds, tiger ===== "Forgiveness is the fragrance that the flower leaves on the heel of the one that crushed it."--->Ali Maula Ali Mauli Ali DamDam __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/

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RE: Veritas Netbackup mailing list
by Traitel, Eyal 23 Jan '02

23 Jan '02

Enjoy those: <http://www.backupcentral.com/faqs.html> Eyal. ----------------------------------------------------------------------------------- Eyal Traitel CNA, MCSE, Solaris CA, Legato CA, SNIA FC SAN L2 ----------------------------------------------------------------------------------- eTraitel - I'm the new eBuzzword around !!! ----------------------------------------------------------------------------------- Get answers NOW! - NetApp On the Web - http://now.netapp.com -----Original Message----- From: Schepers, Jan [mailto:Jan.Schepers@atosorigin.com] Sent: Wednesday, January 23, 2002 11:15 To: toasters(a)mathworks.com Subject: Veritas Netbackup mailing list Hello list, is there a Veritas Netbackup mailing list as there is a Legato Networker list on http://listmail.temple.edu/archives/networker.html regards, Jan

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Veritas Netbackup mailing list
by Schepers, Jan 23 Jan '02

23 Jan '02

Hello list, is there a Veritas Netbackup mailing list as there is a Legato Networker list on http://listmail.temple.edu/archives/networker.html regards, Jan

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