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RE: ONTAP 6.x snapshots
by Fox, Adam 11 May '01

11 May '01

No one had to sell their soul. We just re-wrote how snapshots are done in 6.x. This re-write changes how the blockmap file is generated and give lots of benfits. 1. REALLY fast snapshots, even on 1+ TB volumes! 2. 31 Snapshots per volume rather than 20. The blockmap file was the limiting factor 3. SIGNIFICANTLY less overhead for SnapMirror. The blockmap file of the volume must be moved over during a SnapMirror transfer. The old pre-6 blockmap file was 1/1024 of the volume size. So if you had a 1TB volume, your blockmap size was 1GB. This has been cut by I believe (don't quota me exactly on this) by a factor of 16 or 32, thus speeding up SnapMirrors as well, espcecially small incremental SnapMirror transfers. You may have heard about the "Split Blockmap"? This is the re-write I describe above. Enjoy! -- Adam Fox NetApp Professional Services, NC adamfox(a)netapp.com > -----Original Message----- > From: Todd C. Merrill [mailto:tmerrill@mathworks.com] > Sent: Thursday, May 10, 2001 8:57 AM > To: toasters(a)mathworks.com > Subject: ONTAP 6.x snapshots > > > > To balance my karma on this list, after yesterday's "floppy shuffle" > thread.... > > # time rsh F840-filer-running-6.1 'snap create vol0 test' > creating snapshot... > 0.01u 0.02s 0:00.28 10.7% > > 28-hundredths of a second wall-clock time, including loading > and executing > rsh and building and taking down the TCP/IP connection?! > > Whose soul had to be sold to make the new snapshot work so fast? > > Until next time... > > The Mathworks, Inc. 508-647-7000 x7792 > 3 Apple Hill Drive, Natick, MA 01760-2098 508-647-7001 FAX > tmerrill(a)mathworks.com > http://www.mathworks.com > --- >

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RE: EMC IP4700 vs NetApp F740 (philosophical/OT)
by Martin Hughes 11 May '01

11 May '01

>Did they prove that or just claim it. I can claim my car goes 150 mph and >gets 60 miles per gallon. That doesn't make it true and doesn't make me >credible just because I claimed it and refute when someone else says that it >doesn't. This mindset is beginning to worry me a little. I expect a certain amount of sales banter and exaggeration. I can live with some promotion of one companies product and trashing of another by a company sales rep (although the degree to which direct comparisons are made through advertising surprises me - e.g. this liquid plumber is better than that one because we've done tests so don't buy that product as it's crap). But to sit down with a technical person from one organisation and ask specific technical questions on their company's product and apparently get lied to from not asking the exact specific question/misinformed is going a little beyond the pale. Are we heading towards the situation where a buyer needs to get products in on eval from rival companies each time because they cannot trust the technical claims of the vendors? Couldn't our time be better used rather than each company going over the same ground at every technology jump or new product? To take the example above, if someone claimed that their car did 150mph and 60mpg, but then told me when I asked them directly that was only on a downhill slope of 45 degrees on a specific road in the middle of Germany and they actually get about 110mph on a flat road and 25-30 mpg during Interstate driving, I can deal with that. From what I've experienced, it seems to be akin to asking if a car is petrol, being told it is and then finding out I have to fill it with diesel to get it to work. This may well be because I'm a stranger in a strange land (an Irishman in Houston) but is this normal business practise here? I'd be interested in how everyone else sees this. Regards Martin Enterprise Storage/Enterprise Server Group <mailto:martin.hughes@halliburton.com> cellphone: +1 713 303 9214 office: +1 281 871 4124 -----Original Message----- From: Ferd Berfl [mailto:ferd_berfl@yahoo.com] Sent: Thursday, May 10, 2001 12:30 PM To: Martin Hughes; toasters(a)mathworks.com Subject: RE: EMC IP4700 vs NetApp F740 Did they prove that or just claim it. I can claim my car goes 150 mph and gets 60 miles per gallon. That doesn't make it true and doesn't make me credible just because I claimed it and refute when someone else says that it doesn't. > -----Original Message----- > From: owner-dl-toasters(a)netapp.com > [mailto:owner-dl-toasters@netapp.com]On Behalf Of Martin Hughes > Sent: Thursday, May 10, 2001 9:45 AM > To: toasters(a)mathworks.com > Subject: RE: EMC IP4700 vs NetApp F740 > > > >Your description of how the IP4700's Snapshot copy-on-write > mechanism works > >is right on. The original data is copied to a new location and the new > data > >is written to the original block. Yes this compromises performance. Yes > >you have to allocate physical disk space to accomplish this. No > you cannot > >shrink the amount of disk space you have allocated for this > process if you > >find that it is too much. > > > Hmm, not according to a demo we had from EMC week before last. I grilled > them pretty hard on that and they claimed that they updated the inode file > only and did not copy blocks to another location. > > Well, we have an eval unit coming in next week and I'll do some testing. > > Regards > > Martin > Enterprise Storage/Enterprise Server Group > <mailto:martin.hughes@halliburton.com> > cellphone: +1 713 303 9214 > office: +1 281 871 4124 > > _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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Re: more fun with quotas
by Tom Reingold 11 May '01

11 May '01

I believe it is not necessary to have quota trees in order to have quotas. But it is highly advisable. I highly recommend putting all user home directories in quota trees. If you don't want to make false barriers, put all the users in a single quota tree. This will prevent a disaster. It's possible to have a disaster (well maybe the word is too strong) if your filer fills up. If it fills up, you could truncate an essential file such as /etc/passwd. If the quota tree(s) add up to slightly less than the entire volume, then users will never fill up the filer. Unfortunately, if existing directories are NOT in a quota tree, you have to move them into one. This can be extremely time consuming. I don't know a way around this. You may have to have a night where the filer is unavailable to users while you make the move(s).

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RE: NetAppCertTest
by Fairchild, Peter 11 May '01

11 May '01

There are three 1 hour tests **The Hardware Test covers the 700 and 800 series filers, FC7-9 and DS14 storage shelves, the basics of racking and connecting them, and a bit on back up technology. **The General Knowledge Test looks at elements of Unix and NT, networking, DOT 5.x & 6.x (Normal Commands only), and some break/fix scenarios. **The Configuration Test examines just that: Can you configure a filer, storage shelf, and basic back up system? Volumes, qtrees, quotas, security styles, VIFs, snapshots, autosupport, OS upgrade, dump/restore, etc. Nothing tricky in these tests. Just the fundamentals. Tricky comes at the Professional level where troubleshooting and performance tuning come into play. How to prepare? Take the Hardware and ONTAP System Administration classes and DO THE LABS. Keep up with the NOW site and toasters (you guys are a great source of material ;->) and you should have no problem. Oh, and there is a grid covering all of the above in greater detail on the NOW site. Peter W. Fairchild Technical Certification Program Manager Educational Services NetworkAppliance, Inc. Desk (408) 822-3320 Cell (408) 877-1596 -----Original Message----- From: Honeycutt, Michael [mailto:MichaelHoneycutt@NC.SLR.com] Sent: Friday, May 11, 2001 5:23 AM To: 'toasters(a)mathworks.com' Subject: NetAppCertTest Has anyone taken the NetApp Associate cert test since the move to Sylvan Prometric? If so, can you give me a hint to what kind of questions are asked. Thanks. Michael Honeycutt MCSE/A+ NT/Exchange Engineer IBM Global Services

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Question on quotas...
by Allen, Pat 11 May '01

11 May '01

Hi all, I'm in the process of migrating our user accounts from one F740 to another; both are running 6.0.1R3. On the existing F740, I had a separate volume for the user home directories but I want to keep these in the root volume on my new filer. So I created a qtree (with Unix security style) in my /vol/vol0 volume named users. My quotas file looks like: * user@/vol/vol0 - - * user@/vol/vol0/users 500M - # User Quota My understanding from the documentation indicates that you can put a quota on a qtree - the man pages for the quotas file even shows an example. What I'm finding is that the 500M quota is being applied to the entire /vol/vol0 volume rather than just the users qtree. This is not what I want since I'll have other qtrees there as well and I don't want files in the other qtrees to impact the home directory limit. Does anybody have any suggestions??? On a similar subject, I'm finding that my user mapping isn't working as I would expect. When I copy files from a Windows client to my home directory, all the files end up being owned by root. Obviously, this screws up my quotas. The user name in the NT domain always matches the user name in the NIS domain. This occurs on both the old and the new filer; I even have an explicit mapping configured in usermap.cfg on the old filer. Any suggestions on what is going on? --- Pat Allen (pat(a)mbari.org) Monterey Bay Aquarium Research Institute (MBARI) 7700 Sandholdt Rd, Moss Landing, CA 95039 (voice) 831-775-1724; (fax) 831-775-1620

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NetAppCertTest
by Honeycutt, Michael 11 May '01

11 May '01

Has anyone taken the NetApp Associate cert test since the move to Sylvan Prometric? If so, can you give me a hint to what kind of questions are asked. Thanks. Michael Honeycutt MCSE/A+ NT/Exchange Engineer IBM Global Services

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RE: CLEARING an option setting
by Traitel, Eyal 11 May '01

11 May '01

This is not true. Sorry for mistake. ------------------------------------------------------------------ eTraitel - I'm the new eBuzzword around !!! ------------------------------------------------------------------ Filer Escalation Engineer CNA, MCSE, CSA, LCA, NetApp CA Network Appliance BV Hoofddorp, The Netherlands Office: +31 23 567 9685 Cellular: +31 6 5497 2568 ------------------------------------------------------------------ Get answers NOW! - NetApp On the Web - http://now.netapp.com ------------------------------------------------------------------ -----Original Message----- From: Traitel, Eyal [mailto:eyal@netapp.com] Sent: Friday, May 11, 2001 12:40 AM To: 'Frank Cusack'; toasters(a)mathworks.com Subject: RE: CLEARING an option setting You should be able to use options nis.servers "" Eyal. ------------------------------------------------------------------ eTraitel - I'm the new eBuzzword around !!! ------------------------------------------------------------------ Filer Escalation Engineer CNA, MCSE, CSA, LCA, NetApp CA Network Appliance BV Hoofddorp, The Netherlands Office: +31 23 567 9685 Cellular: +31 6 5497 2568 ------------------------------------------------------------------ Get answers NOW! - NetApp On the Web - http://now.netapp.com ------------------------------------------------------------------ -----Original Message----- From: Frank Cusack [mailto:frank@google.com] Sent: Thursday, May 10, 2001 9:02 PM To: toasters(a)mathworks.com Subject: CLEARING an option setting How can I do this? I'd like to do something like unoption nis.servers so that there is a blank or no setting associated with an option. Is it safe to edit the registry file to to this? thx /fc

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RE: CLEARING an option setting
by Bond, Andrew 11 May '01

11 May '01

Barry's suggestion is the correct way (although it's 'options' rather than 'option'). Please do not try to edit the registry. Regards, Andrew Bond Consulting Systems Engineer Network Appliance UK > -----Original Message----- > From: Barry Lustig [mailto:barry@lustig.com] > Sent: 11 May 2001 06:38 > To: Frank Cusack > Cc: toasters(a)mathworks.com > Subject: Re: CLEARING an option setting > > > Frank Cusack wrote: > > > > How can I do this? > > > > I'd like to do something like > > > > unoption nis.servers > > > Try option nis.servers "" > > barry >

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RE: CLEARING an option setting
by Traitel, Eyal 11 May '01

11 May '01

You should be able to use options nis.servers "" Eyal. ------------------------------------------------------------------ eTraitel - I'm the new eBuzzword around !!! ------------------------------------------------------------------ Filer Escalation Engineer CNA, MCSE, CSA, LCA, NetApp CA Network Appliance BV Hoofddorp, The Netherlands Office: +31 23 567 9685 Cellular: +31 6 5497 2568 ------------------------------------------------------------------ Get answers NOW! - NetApp On the Web - http://now.netapp.com ------------------------------------------------------------------ -----Original Message----- From: Frank Cusack [mailto:frank@google.com] Sent: Thursday, May 10, 2001 9:02 PM To: toasters(a)mathworks.com Subject: CLEARING an option setting How can I do this? I'd like to do something like unoption nis.servers so that there is a blank or no setting associated with an option. Is it safe to edit the registry file to to this? thx /fc

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CLEARING an option setting
by Frank Cusack 11 May '01

11 May '01

How can I do this? I'd like to do something like unoption nis.servers so that there is a blank or no setting associated with an option. Is it safe to edit the registry file to to this? thx /fc

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