toasters July 1997

toasters@lists.teaparty.net

29 participants
24 discussions

Re: Filers for a large mail environment
by Alan Judge 03 Jul '97

03 Jul '97

Joel> My understanding is that even with nfs locking having multiple Joel> systems do delivery is not safe. Probably, though having one delivery system and multiple POP/IMAP system might be nearly as bad. It depends. Joel> Could you live with a single (+ backup) delivery system? Having Joel> several MXs of different preferences should be ok as I would Joel> expect only one to actually be delivering mail at any time. Probably. We'll have to test performance for this setup. -- Alan

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NetApp Errors
by John F. Kane 02 Jul '97

02 Jul '97

Has anyone experienced any of the following errors on their F330 (or any other) filer running Release 4.0.1c? 1.) Unexplained reboots 2.) portmapper errors-> [portmapper]: portmap: prog (100004,2,2) not registered 3.) rsh hangs -> "system hung (rshd_0)!" 4.) machine check -> MACHINE CHECK: addr 0037470c,mctd,PCMC ERRSTS 8 5.) crash -> "trap 13 code=0 eip=20625f cs=8 eflangs=10202" Any help would be appreciated. -- John F. Kane Joint Analysis Center, EUCOM The MITRE Corporation

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Filers for a large mail environment
by Alan Judge 02 Jul '97

02 Jul '97

We're considering purchasing filer(s) as part of a mail system upgrade. Setup would be a cluster of redundant and very similarly configured machine around one or more filers containing all the real data (/var/spool/mail for customers, some web serving, and other stuff). Most likely all the clustered machines will do delivery to the shared area and POP/IMAP reading. Our desired platform is PCs running FreeBSD (or perhaps BSDI). One major problem is that none of the PC Unix environments (FreeBSD, BSDI, Linux) have working NFS file locking. We could implement some hacks using file based locking, but I'm worried about the hassle and performance issues here. In fact, even with working NFS locking, I'd be worried about sharing mail spools in this fashion. I've also had advice from people who recommend avoiding NFS entirely and going for transparent proxies and multiple machines for scalability. But that leaves a reliability/redundancy issue (hardware RAIDs, s/w mirroring, ...). What I'm wondering and perhaps people on the list can help is: - anyone doing something similar in an ISP environment (what platform, what filer, how many users?) - any advice/ideas on the locking issue - will filers perform well in this environment? some of the client applications are not well behaved and do things like copy the entire mail box; local disk would obviously be faster (I can get over 35MB/sec using multiple local disks on PCs), but I'm not sure it's that big an issue -- Alan Judge Phone: +353-1-6046901 Indigo Network Operations Centre Fax: +353-1-6046948

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archive
by Tom Yates 02 Jul '97

02 Jul '97

i'm getting a report that the archive is impossible to get to. can anyone who has experienced problems in getting to the toasters archive (http://teaparty.mathworks.com:1999/toasters/archive/) let me know? thanks. Tom Yates - Unix Chap - The Mathworks, Inc. - +1 (508) 647 7561 MAG#65061 DoD#0135 AMA#461546 1024/CFDFDE39 0C E7 46 60 BB 96 87 05 04 BD FB F8 BB 20 C1 8C "Microsoft (tm) is a single-sofa supplier"

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toasters July 1997