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dlt8000 supported?
by Luke Mewburn 26 Oct '99

26 Oct '99

Hi All. Is the DLT-8000 supported in OnTap? I've been quoted a price on a DLT-8000 that is A$100 more than a DLT-7000, and when you're paying nearly A$8000 for a tape drive that seems like a good deal to me. Hopefully a DLT-8000 should act like a DLT-7000 given the same tape density SCSI control codes. I'd rather spend a little bit more money now for a drive with 12.5% more capacity, even if I have to wait for a newer release to get that extra density. Luke.

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Re: mailboxes on toaster
by Jim McCoy 26 Oct '99

26 Oct '99

George Kahler wrote: >Q: Will mbx buy me performance on the toaster ? >Q: Is Maildir a better choice ? As in all difficult questions the answer is "it depends." People have given some very good reasons on why maildir is an appropriate choice given certain constraints, so let me mention a few things that favor mbox-format mail storage on a filer. We run several tens of millions of user mailboxes on a fleet of NetApps for YahooMail and so here are a few other points to consider that we have run into over the past few years: 1) Locking is a dead issue for mbox. There is no way to adequately provide file locking via the standard channels so you will probably need to deal with the locking issue as a seperate problem. We ended up writing our own mailbox locking system but you might be able to use procmail for as your local delivery agent and let that try to figure out the locking issues. Locking is important, but do not fixate on this issue and ignore all of the other points that you need to consider. 2) Inode cost should not be overlooked. You get at most 32 million per volume, so if you have a lot of mailboxes a maildir or other one-file-per-message scheme will chew through your inode limit long before you run out of disk space on that volume. To compensate you will have to make smaller volumes. This is not necessarily a bad thing but each volume will be at least one additional raid group and on additional wasted parity disk (increased cost/mailbox). The larger number of inodes in use will also increase the time it takes your filer to complete a wack run and will have an impact on backup speeds. 3) Mail messages are small. There is a simple bimodal distribution to internet mail message size, they are either very small or very large. The small files will cost you storage bits because the filer uses 4K to store each 500byte message. The small file sizes will also keep your read chain length very low so we will get significantly decreased performance on your backups of this volume and you will notice some decreased read performance on the filer in general. jim

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Re: mailboxes on toaster
by jrg＠gbnet.net 25 Oct '99

25 Oct '99

On Mon 25 Oct, 1999, "Luke Gain" <luke(a)erinet.com> wrote: >one thing I found to be a big win is to make sure all the filenames are 12 >characters >or less. evidentally, the netapp only caches names that are <12 characters >long. >so if the name is >12 characters it takes a disk-op to read the directory. I expect it'll interact with your operating system, too (or this may actually be the sole cause.) Eg. Solaris puts namei lookup results in the DNLC (directory name lookup cache) only if they're under a certain size (vmstat -s shows these as "toolong"), so if you've got long directory paths you would expect to see a problem not dissimilar to the one you describe. On the subject of the DNLC, beware of making it too big as that has been bad for performance too. ("classic" BSD sets this "toolong" constant NCHNAMLEN at 31. FreeBSD-current seems to have done away with it.) James.

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Re: General VIF questions
by Sam Cramer 25 Oct '99

25 Oct '99

>>>>> "Brian" == Brian Tao <taob(a)risc.org> writes: Brian> Since this is all theoretical (to me, anyway), I have some Brian> questions. :) Brian> What characters are allowed in a VIF name? A vif name may be composed of any non-blank characters and should begin with a letter. The name may be at most 15 characters long. Brian> Is anyone using single-mode VIF's across two different switches like Brian> this? Yes. We have a number of customers who use single-mode vifs composed of links attached to two different switches to protect against switch failure. Brian> How does the Netapp know which VIF to use with the "vif favor" Brian> command? I assume this means a physical interface can only Brian> participate in one VIF at a time. Yes, an interface (physical or virtual) can only participate in one vif at a time. Brian> Is it possible to prioritize interfaces in a VIF with more than two Brian> ports trunked together? If you're asking "can you favor a link in a single-mode VIF composed of more than 2 links", the answer is yes. If you're asking "can I specify secondary, tertiary (and so on) priority for links in a single-mode VIF", the answer is no: only one link may be favored; all others are equally "non-favored". Brian> Can VIF's be shared in a cluster? Can they share ports as above? Brian> Special mention is only made about super VIF's and clustering in the Brian> 5.3.2 SAG. vifs can't be shared across a cluster. However, the surviving node may takeover for a vif just like it may takeover for other interfaces. Which interface takes over is specified using the "ifconfig" "partner" clause. Please note that vif partners MUST be specified using the interface name (e.g. vif0), not the interface address (e.g. 172.27.5.50). This was not clearly spelled out in the documentation, and it has tripped up a number of people. Brian> Can super VIF's be created from single-mode VIF's, or only Brian> multi-mode VIF's? Again, the manual only mentions the latter, but Brian> does not prohibit the former. Super vifs may be created from single-mode vifs or multi-mode vifs. I'm not sure why you would want to create a super-vif from single-mode vifs, though. Brian> Can super VIF's themselves be multi-mode, or single-mode only? Single mode only. Sam

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We Need Homeworkers!!
by mowooco＠mindspring.com 25 Oct '99

25 Oct '99

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a recent caching company bugid ticket info
by Colin Johnston 22 Oct '99

22 Oct '99

For a good Friday night read :) Title Some customers would like our apppliances to be more groovy Problem It was noted by a customer that the design of our caches wasn't groovy enough. They would like the caches to glow and blink. Stackability and the ability to use the server as a die in Dungeons & Dragons games was also mentioned. Workaround You can currently customize the "groovability" of the cache with third party add ons from http://www.legomindstorms.com/ . Your imagination and pocketbook are your only limitations. Colin Johnston SA PSINET UK

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Source for a non-root quota program?
by James Deibele 21 Oct '99

21 Oct '99

We would like our support people to be able to do real-time quota verification for customers, meaning that support person A is able to tell customer B that they're using 9.688MB of their 10MB quota. Having gone that far, we would actually really like to have a web page for our non-UNIX customers to check their usage. We can't use the normal /usr/ucb/quota program that comes with Solaris because it requires you to run as root to check someone else's usage. If we try to use suexec or cgiwrap to run programs as the user, we will have to make a copy of the script for every customer. This is sub-optimal. So what we want is a program (Solaris preferred, Linux or NT might be acceptable) that will allow any user to check the total usage for any other user. Seems like this would have come up with other people using NetApps extensively. Does NetApp have an official program that does this? Possibly a program that someone has contributed?

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Re: Source for a non-root quota program?
by dnb＠ccs.neu.edu 20 Oct '99

20 Oct '99

I've not tried this as non-root, but there is a Perl module which can do all sort of good quota stuff for you. It can be found at: http://search.cpan.org/search?module=Quota Peace, dNb

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Re: Easiest way to migrate data off of Filer
by dnb＠ccs.neu.edu 20 Oct '99

20 Oct '99

Bennett Todd <bet(a)mordor.net> writes: > If you have the GNU findutils first on your PATH (which I always recommend > doing), you can use > cd /src;find dir -depth -print0|cpio -p0dm /dst Quick note about this: unless you have patched it, the find command will pick up the .snapshot dirs as well. There was a patch posted to this list a while back. If anyone can't find in the archives, drop me a note and I'll send it along. It works really well (we replaced our default install of GNU find with a patched version because it works so well). Peace, dNb

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RE: Source for a non-root quota program?
by Thompson, Tim 20 Oct '99

20 Oct '99

> So what we want is a program (Solaris preferred, Linux or NT > might be acceptable) that will allow any user to check the > total usage for any other user. >... > Does NetApp have an official program that does this? > Possibly a program that someone has contributed? In the "Tools & Utilities" section of the NOW (http://now.netapp.com) site, in the "Toolshed" area, you'll find a "quota_tools" entry. That package contains several utilities for quotas, including a perl script named netapp_quota_report that will talk to a NetApp Filer via rsh, get a quota report, and construct an HTML web page. You can specify a quota limit, and people over that limit will be highlighted in red. *NOTE* - Be sure to use the "-ontap 5" option to netapp_quota_report, if you are using ONTAP 5.0 or higher. The quota_tools package also contains some scripts for sending mail when quotas are exceded. The package was written by Ed Finch (efinch(a)vais.net). ...Tim Thompson...Network Appliance, Inc...tjt(a)netapp.com...

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