toasters July 2000

toasters@lists.teaparty.net

111 participants
130 discussions

RE: filer Olympics -Reply
by Timothy Cook 14 Jul '00

14 Jul '00

Baah!!!! In the old days all they would have had was flint chisels and Buffalo hair! p.s. yes scw, I did accidentally delete mathworks from the mailing list instead of you. oops! >>> "Stephen C. Woods" <scw(a)seas.ucla.edu> 07/14/00 06:23am >>> > Now where's the fun in that??? ;-) You should be able to perform > all your filer hardware maintenance with a hunting knife, some chewing > gum, and two feet of piano wire. :) Uhmmmm I think that you might have ment bailing wire, given that Piano wire will probably take a nick out of your knide blade. ----- Stephen C. Woods; UCLA SEASnet; 2567 Boelter hall; LA CA 90095; (310)-825-8614 Finger for public key scw(a)kinross.seas.ucla.edu,Internet mail:scw@SEAS.UCLA.EDU

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Cluster Failover
by Uros Lampret 14 Jul '00

14 Jul '00

Hi! Does anybody have any experience with clusters. How much down time can I expect with two F740 in cluster. _____________________________ Uros Lampret Our Space d.o.o. Malnarjeva ulica 47 1000 Ljubljana - Slovenia tel. +386 1 2425 372 fax +386 1 5000 959 email: Uros.Lampret(a)ourspace.si internet: www.ourspace.si _____________________________

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test
by grant.berry＠netapp.com 14 Jul '00

14 Jul '00

test

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Re: Cluster Failover
by Michael Rogan 14 Jul '00

14 Jul '00

Hello, If you force a failover the other system can be up in as little as 30 seconds, the more NFS and CIFS exports you have adds a little time. If the system detects a failure it seems to add 15-20 seconds to give the other system a chance to recover before takeover. Of course it also takes 30+ seconds to giveback. Michael Michael J. Rogan BlackBerry Sys Admin Research In Motion www.blackberry.net www.rim.net -----Original Message----- From: Uros Lampret <uros.lampret(a)ourspace.si> To: toasters(a)mathworks.com <toasters(a)mathworks.com> Sent: Fri Jul 14 01:40:23 2000 Subject: Cluster Failover Hi! Does anybody have any experience with clusters. How much down time can I expect with two F740 in cluster. _____________________________ Uros Lampret Our Space d.o.o. Malnarjeva ulica 47 1000 Ljubljana - Slovenia tel. +386 1 2425 372 fax +386 1 5000 959 email: Uros.Lampret(a)ourspace.si internet: www.ourspace.si _____________________________

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RE: filer Olympics
by Stephen C. Woods 14 Jul '00

14 Jul '00

> Now where's the fun in that??? ;-) You should be able to perform > all your filer hardware maintenance with a hunting knife, some chewing > gum, and two feet of piano wire. :) Uhmmmm I think that you might have ment bailing wire, given that Piano wire will probably take a nick out of your knide blade. ----- Stephen C. Woods; UCLA SEASnet; 2567 Boelter hall; LA CA 90095; (310)-825-8614 Finger for public key scw(a)kinross.seas.ucla.edu,Internet mail:scw@SEAS.UCLA.EDU

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F740 filesystem restore throughput?
by Brian Tao 14 Jul '00

14 Jul '00

How fast can I realistically expect an F740 to write out files doing a restore? I have an F740 that is currently doing nothing else, with a 10/100 Mbps Ethernet NIC connected to a Cisco 3548XL switch, and one shelf of 7x36GB drives. I'm dumping from a Sun E420R (4x450-MHz, 50GB Barracuda's on LSILogic Ultra2/LVD adapters) connected to the same switch via 1000base-SX. The command line used is: ufsdump 0bf 128 - /dev/rdsk/c1t0d0s0 | rsh home-tape restore xbfD 128 - /vol/vol0/local The F740 (home-tape) seems to be the bottleneck in this case: # rsh home-tape sysstat 5 CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache in out read write read write age 100% 0 0 0 6316 104 29 6127 0 0 >60 99% 0 0 0 6396 106 28 6558 0 0 >60 100% 0 0 0 6356 105 24 7764 0 0 >60 100% 0 0 0 6316 104 40 7189 0 0 >60 93% 0 0 0 5983 99 28 6112 0 0 >60 100% 0 0 0 6395 106 28 6465 0 0 >60 99% 0 0 0 6272 104 51 8878 0 0 >60 100% 0 0 0 6506 107 36 6149 0 0 >60 [...] An 8-hour restore window gives enough time to do about 150GB (which, coincidentally, is how much usable space is on 5x36GB data drives ;-)). Any performance tuning tips for doing a fast-as-possible disaster recovery restore like this? I'm going to try streaming data off tape next, instead of kludging it with a ufsdump, but it seems like the Netapp can't go any faster. Is it possible to tell how much of the CPU is used up in rsh overhead, or TCP/IP overhead? Will I gain much if I used NDMP to stream the data to the filer? What about replacing the Fast Ethernet NIC with a Gigabit NIC that can offload packet checksumming from the main CPU? Anyone have numbers? -- Brian Tao (BT300, taob(a)risc.org) "Though this be madness, yet there is method in't"

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RE: filer Olympics
by Anissa.Mohler＠netapp.com 14 Jul '00

14 Jul '00

:From: Brian Tao [mailto:taob@risc.org] :On Thu, 13 Jul 2000, Mike Sphar wrote: :> :> Leatherman? Feh. Cordless drill with adjustable torque. : : Now where's the fun in that??? ;-) You should be able to perform :all your filer hardware maintenance with a hunting knife, some chewing :gum, and two feet of piano wire. :) You just purchased that second GigE card for your filer. You drive over to the co-lo to install it and find out that you forgot your tools in the office. You think to yourself.... "Now, what would MacGyver do?" *grin*

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RE: filer Olympics
by Mike Sphar 14 Jul '00

14 Jul '00

Hey, if I wanted to do things the hard way, I'd be running Linux and Samba on a 386. (Not NT with an NFS server though. That's too brutal even for me.) I made my boss pay good money for these filers for a reason: Less work for me. -- Mike Sphar - Sr Systems Administrator - Engineering Support Services, BOFH, GWP, MCP, MCP+I, MCSE, BFD -----Original Message----- From: Brian Tao [mailto:taob@risc.org] Sent: Thursday, July 13, 2000 4:55 PM To: Mike Sphar Cc: 'toasters(a)mathworks.com' Subject: RE: filer Olympics On Thu, 13 Jul 2000, Mike Sphar wrote: > > Leatherman? Feh. Cordless drill with adjustable torque. Now where's the fun in that??? ;-) You should be able to perform all your filer hardware maintenance with a hunting knife, some chewing gum, and two feet of piano wire. :) -- Brian Tao (BT300, taob(a)risc.org) "Though this be madness, yet there is method in't"

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RE: filer Olympics
by jeff.mohler＠netapp.com 14 Jul '00

14 Jul '00

If you use a long screwdriver with a big fat handle on it..you can spin enough mass once a screw is lose, or just started that you can turn it in in about a second with two fingers on the shaft. How about a yankee drill? *grin* -----Original Message----- From: Brian Tao [mailto:taob@risc.org] Sent: Thursday, July 13, 2000 4:55 PM To: Mike Sphar Cc: 'toasters(a)mathworks.com' Subject: RE: filer Olympics On Thu, 13 Jul 2000, Mike Sphar wrote: > > Leatherman? Feh. Cordless drill with adjustable torque. Now where's the fun in that??? ;-) You should be able to perform all your filer hardware maintenance with a hunting knife, some chewing gum, and two feet of piano wire. :) -- Brian Tao (BT300, taob(a)risc.org) "Though this be madness, yet there is method in't"

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filer Olympics
by Todd C. Merrill 13 Jul '00

13 Jul '00

;) Had a humorous thought...we've had to replace a lot of motherboards and memory in the last 2 weeks for various reasons, and I've been getting pretty good at it. I was looking back at the logs at the actual downtime for these various tasks. My best times so far have been, where "downtime" is measured from the filer messgages: System shut down with "halt" command. to NetApp Release 5.w.xRyPz boot complete. memory swap: 3 minutes, 57 seconds [0] motherboard swap: 15 minutes, 54 seconds [0] [1] I've broken the "4-minute mile" for the former, but not the "15 minute" mark for the latter. Next time. Or, maybe a contestant on "Fix That Filer" ala "Name That Tune": FilerAdmin1: I can fix that filer in 6 minutes. FilerAdmin2: I can fix that filer in 5 minutes. FilerAdmin3: I can fix that filer in 4 minutes. Wink Martindale: Okay, FilerAdmin3....fix that filer! Okay, time for some breakfast and some serious work now... [0] This includes a 32 second "penalty" for upping 4 links on a vif. [1] Three PCI cards: NVRAM, FCAL, quad ethernet 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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toasters July 2000