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13531 discussions

Awful ufsrestore performance reading from DLT7000 on F810
by Chris Thompson 11 Mar '04

11 Mar '04

I am running ONTAP 6.4.3P2 on an F810. It has a SCSI-attached DLT7000 drive used primarily for its own backups, but we also use the filer's rmt(8) implementation to dump a few Solaris ufs partitions that way. We've been doing a round of checking that we can we restore from our backups. Everything went fine until I tried to restore these Solaris partitions. The problem isn't content, but the appallingly slow transfer rate. This isn't ufsrestore's fault per se, as I've used a program that just does 63KB reads via the rmt interface and disposes of the data [*] and I can still get at best 400 KB/sec out if it. That's at least a factor of 10 less than it should be: dumping the Solaris partitions achieves something like 4000 KB/sec [not quite up to 7000 KB/sec that the ONTAP dumps run at --- there's a 100 MHz network link involved --- but acceptable]. It's not a problem with tape reading as such: ONTAP restores run at essentially the same speed as ONTAP dumps. We certainly didn't have this problem the last time we tried this, about a year ago. What's changed since then? . we were using an F740 that has been replaced by the F810 [the DLT7000 tape drive is the same one] . we were running ONTAP 6.2.2 then, 6.4.3P2 now . we were running Solaris 8 then, Solaris 9 now (well patched, in both cases) - but as mentioned above, it's not ufsrestore per se Anyone got any ideas on this one? or similar experiences? Chris Thompson Email: cet1(a)cam.ac.uk [*] "Disposes of the data" after it's been sucked through a pipe on the Solaris host. I suppose I could write a program to call rcmd(3) directly rather than relying on rsh(1) to do it for me, but I really doubt that this can be where the bottleneck lies.

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FROM CAPT WILLIAMS OKELELE.
by williams_okolele 11 Mar '04

11 Mar '04

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FROM CAPT WILLIAMS OKELELE.
by williams_okolele 11 Mar '04

11 Mar '04

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11 Mar '04

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Interested in learing of average disk utilization values for others using Netapp Filers for clients hosting web servers
by Errol Casey 10 Mar '04

10 Mar '04

I'm interested in learning of common values for disk utilization across disk in 4,5,8,10 disk volumes on filers that are in use with host clients that server clients that are hosting web servers (that general server traffic such as HTML files, PHP files, JPG files, etc generally small files). Here is a snap shot of some values from my server for comparison. We had some performance problems recently, and our disk utilization was exceeding 50% ; but we have decreased this back to reasonable levels but would like to see what other Netapp users are at. Currently, our levels are averaging 15 for an 8 disk volume and 13 for a 12 disk volume. These values are being obtained from statit statistics.

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CIGARETTE Warehouse - We're Practically Giving Them Away, Wed, 10 Mar 2004 03:43:43 -0500
by Robin Galloway 10 Mar '04

10 Mar '04

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remove
by Vincent, Alex 08 Mar '04

08 Mar '04

LEGAL NOTICE Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this e-mail by anyone else is unauthorised. If you are not an addressee, any disclosure or copying of the contents of this e-mail or any action taken (or not taken) in reliance on it is unauthorised and may be unlawful. If you are not an addressee, please inform the sender immediately. Pfizer Consumer Health Products Company is registered in England under No.2930463 with its registered office at Walton Oaks, Dorking Road, Walton on the Hill, Surrey, KT20 7NS

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Quota logging question
by Matt Phelps 06 Mar '04

06 Mar '04

Sorry if this has been asked before. Is there any way to get quota log messages to use the username info from NIS in the logs insted of just the UID? It's minor, but a pain. Data OnTap 6.4.2P6, NFS with Solaris and Linux clients only. Thanks, -- Matt Phelps System Administrator, Computation Facility Harvard - Smithsonian Center for Astrophysics mphelps(a)cfa.harvard.edu, http://cfa-www.harvard.edu/~mphelps

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RE: Linux / NetApp / Oracle question
by Barrette, Paul A PENC:EX 05 Mar '04

05 Mar '04

These are the mount options I use for RHAS 2.1 connecting to an F820 nfs rw,hard,nfsvers=3,intr,suid,rsize=32768,wsize=32768,proto=udp 0 2 Also, I would not consider connecting to an oracle database over 100 meg. We use GigE ourselves. Paul Barrette -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Duncan Greenwood Sent: Friday, March 05, 2004 12:58 PM To: Geoff Hardin Cc: toasters Subject: Re: Linux / NetApp / Oracle question Try the tech papers at http://www.netapp.com/tech_library/ e.g. http://www.netapp.com/tech_library/3129.html I played with 9iRAC on RHAS 2.1 against NetApp last year and seem to recall we needed to experiment with rsize and wsize to get decent i/o performance, but that was over GbE. See the tips at: http://nfs.sourceforge.net/nfs-howto/performance.html hth D ----- Original Message ----- From: "Geoff Hardin" <geoff.hardin(a)dalsemi.com> To: "Haynes, Tom" <thomas(a)netapp.com> Cc: "toasters" <toasters(a)mathworks.com> Sent: Friday, March 05, 2004 7:37 PM Subject: Re: Linux / NetApp / Oracle question > I've had several people ask for more details about the configuration: > > Network: > 100 Mb switched network full duplex > > Filer: > F760C with ONTAP 6.4.1 > > Database Server: > RHEL Kernel 2.4.21-9.EL > 1 GB of RAM; (we're trying to get that increased because we have seen > some swapping going on) 1 Intel 2.4 GHz Xeon processor > Mount options: rw,fg,hard,nointr,retrans=2,tcp,vers=3,timeo=600 > > We are using NFS over TCP by the recommendation of NetApp and because > we saw data corruption when we were using NFS over UDP. I am looking > into some of the mount options for Linux; one document says to turn > noac off, another says to turn it on. I haven't seen any reference to > a forcedirectio option, and I know that asynch I/O is not supported in > NFS for Linux (yet?). > > If you have any other questions, let me know and I'll do my best to > answer them. Thanks to everyone who has responded so far! > > Geoff > > Haynes, Tom wrote: > > >Geoff, > > > >You should have mentioned what type of filer and what version of > >OnTap you were running. > > > >Thanks, > >Tom > > > > > > > >>Hey Toasters, > >> I have a situation that has come up where we are testing Oracle > >>9i on a 2.4 GHz Intel Xeon system with Red Hat Enterprise Linux 3.0 > >>as the operating system. The database itself resides on a NetApp > >>filer. We have run through the normal problems, switching to NFS > >>over TCP rather than UDP, no asynch I/O, not as much like Solaris as > >>we expected, but now we're still not seeing the level of performance > >>that we had expected. Our test database run on a Sun 280R takes > >>about 2 hours; the same test run on our Linux system takes about > >>2:40. Definitely not the results we had expected. > >> I was just wondering if anyone out there has done something > >>similar and has any tuning recommendations. Oracle tells us that it > >>should work fine on Linux, and we know our other databases work fine > >>running off filers, so that leaves us with a solution that should > >>work, but doesn't. Any recommendations, white papers, or RTFM (as > >>long as you indicate which manual), would be greatly appreciated. > >> > >>Geoff Hardin > >>UNIX System Administrator > >>Dallas Semiconductor > >>geoff.hardin(a)dalsemi.com > >> --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004

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Fwd: Re: Linux / NetApp / Oracle question
by Jerry 05 Mar '04

05 Mar '04

Forgot to cc the list as well.... > > You shouldn't have to mess with rsize and wsize if > you > use TCP, set it to as high as the filer (it should > default as high as the filer 32k in nfsv3). The > reason you have to mess with it using udp appears to > be flow control related and only in mixed speed > networks in my experience (gig-e filer to 100mb > clients). > > What I would do is confirm you are really using TCP, > several implementations of the mount command seem to > ignore bad options, run tcpdump and copy and file, > make sure it's sending tcp packets. On solaris it's > proto=tcp, however on linux I think it's just -o > tcp. > The wierd thing is, if you give it a wrong option > under some implementations it returns a prompt, and > the mount command even shows that option! > > --- Duncan Greenwood > <duncan.greenwood(a)btinternet.com> > wrote: > > Try the tech papers at > > http://www.netapp.com/tech_library/ > > > > e.g. http://www.netapp.com/tech_library/3129.html > > > > I played with 9iRAC on RHAS 2.1 against NetApp > last > > year and seem > > to recall we needed to experiment with rsize and > > wsize to get decent > > i/o performance, but that was over GbE. > > > > See the tips at: > > > http://nfs.sourceforge.net/nfs-howto/performance.html > > > > hth > > > > D > > > > > > ----- Original Message ----- > > From: "Geoff Hardin" <geoff.hardin(a)dalsemi.com> > > To: "Haynes, Tom" <thomas(a)netapp.com> > > Cc: "toasters" <toasters(a)mathworks.com> > > Sent: Friday, March 05, 2004 7:37 PM > > Subject: Re: Linux / NetApp / Oracle question > > > > > > > I've had several people ask for more details > about > > the configuration: > > > > > > Network: > > > 100 Mb switched network full duplex > > > > > > Filer: > > > F760C with ONTAP 6.4.1 > > > > > > Database Server: > > > RHEL Kernel 2.4.21-9.EL > > > 1 GB of RAM; (we're trying to get that increased > > because we have seen > > > some swapping going on) > > > 1 Intel 2.4 GHz Xeon processor > > > Mount options: > > rw,fg,hard,nointr,retrans=2,tcp,vers=3,timeo=600 > > > > > > We are using NFS over TCP by the recommendation > of > > NetApp and because we > > > saw data corruption when we were using NFS over > > UDP. I am looking into > > > some of the mount options for Linux; one > document > > says to turn noac off, > > > another says to turn it on. I haven't seen any > > reference to a > > > forcedirectio option, and I know that asynch I/O > > is not supported in NFS > > > for Linux (yet?). > > > > > > If you have any other questions, let me know and > > I'll do my best to > > > answer them. Thanks to everyone who has > responded > > so far! > > > > > > Geoff > > > > > > Haynes, Tom wrote: > > > > > > >Geoff, > > > > > > > >You should have mentioned what type of filer > and > > what version of > > > >OnTap you were running. > > > > > > > >Thanks, > > > >Tom > > > > > > > > > > > > > > > >>Hey Toasters, > > > >> I have a situation that has come up where > we > > are testing Oracle 9i > > > >>on a 2.4 GHz Intel Xeon system with Red Hat > > Enterprise Linux 3.0 as the > > > >>operating system. The database itself resides > > on a NetApp filer. We > > > >>have run through the normal problems, > switching > > to NFS over TCP rather > > > >>than UDP, no asynch I/O, not as much like > > Solaris as we expected, but > > > >>now we're still not seeing the level of > > performance that we had > > > >>expected. Our test database run on a Sun 280R > > takes about 2 hours; the > > > >>same test run on our Linux system takes about > > 2:40. Definitely not the > > > >>results we had expected. > > > >> I was just wondering if anyone out there > has > > done something similar > > > >>and has any tuning recommendations. Oracle > > tells us that it should work > > > >>fine on Linux, and we know our other databases > > work fine running off > > > >>filers, so that leaves us with a solution that > > should work, but doesn't. > > > >> Any recommendations, white papers, or RTFM > (as > > long as you indicate > > > >>which manual), would be greatly appreciated. > > > >> > > > >>Geoff Hardin > > > >>UNIX System Administrator > > > >>Dallas Semiconductor > > > >>geoff.hardin(a)dalsemi.com > > > >> > > > > > > --- > > Outgoing mail is certified Virus Free. > > Checked by AVG anti-virus system > > (http://www.grisoft.com). > > Version: 6.0.593 / Virus Database: 376 - Release > > Date: 20/02/2004 > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Finance: Get your refund fast by filing > online. > http://taxes.yahoo.com/filing.html > __________________________________ Do you Yahoo!? Yahoo! Search - Find what you�re looking for faster http://search.yahoo.com

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