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Mac Forum / General / Networking / November 2004bizarre performance problem with mac file server
We have Xinet running on a Sun file server, very successfully thus far, but recently we found that file transfers (both directions) have been very slow -- on the order of 100 times slower than other methods. Example: Same server, same *file*, same network spigot, transfer rate via SMB: a little over 7 Mbytes/second. Transfer rate via Appletalk share: tens of kilobytes per second. I've done some research, and found articles discussing performance problems with Appletalk protocols over Cisco gear, but we're doing Appletalk-over-IP so they don't seem to apply. The client machines are running OSX 10.3.6, and Xinet is (admittedly elderly) version 10. We are qualifying version 12 in the lab, but at this moment we don't have any reason to believe it'll fix the problem. The odd thing is, performance used to be acceptable. We have added more disk and memory to the server, but haven't updated either the OS or Xinet. The client side has had various upgrades and bugfixes, of course. Any and all feedback welcome. Ron (ronc@europa.com) Additional information: I did a truss of the ksd process and the following sequence repeats continuously during file transfer. Unfortunately, one never looks at this stuff unless there's a problem, so I don't know whether this is normal or not, but it seems odd that I'd keep getting SIGALRMs every second or so. #### getuid() = 0 [2010] lseek(11, 0x03060000, SEEK_SET) = 0x03060000 sigprocmask(SIG_UNBLOCK, 0xFFBEF528, 0x00000000) = 0 read(11, "0FF20F\00EF00FFF0E010F0E".., 65536) = 65536 sigprocmask(SIG_UNBLOCK, 0xFFBEEFC8, 0x00000000) = 0 send(8, "010205A3\0\0\0\0\001\0\0".., 16, 0) = 16 send(8, "0FF20F\00EF00FFF0E010F0E".., 65536, 0) = 65536 sigprocmask(SIG_UNBLOCK, 0xFFBFF6C8, 0x00000000) = 0 sigprocmask(SIG_BLOCK, 0xFFBFF6C8, 0x00000000) = 0 sigprocmask(SIG_UNBLOCK, 0xFFBFF6C8, 0x00000000) = 0 Received signal #14, SIGALRM, in poll() [caught] poll(0xFFBFF628, 3, -1) Err#4 EINTR alarm(1) = 0 setcontext(0xFFBFF310) sigprocmask(SIG_BLOCK, 0xFFBFF6C8, 0x00000000) = 0 sigprocmask(SIG_UNBLOCK, 0xFFBFF6C8, 0x00000000) = 0 #### Ron |
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