On Mon, 27 Sep 2004 22:55:59 +0800, Winelfred G. Pasamba <[EMAIL PROTECTED]> wrote: > On Mon, 27 Sep 2004 21:09:34 +0800, ian sison (mailing list) > <[EMAIL PROTECTED]> wrote: > > > about athlons, are they reliable enough? i would use it for my home > > > and office workstation for cost-efficiency but not for servers that > > > need stability over cost-efficiency. or are they (amd cpus) still > > > cost-efficient these days? educate me on this. > > > > Athlons are about as good in production as P4's are. You can even > > have the equivalent > > of poor man's SMP by using Athlon dualie boards which will definitely > > cost much less than > > a dual Xeon setup. Again, for database intensive operations, you > > should invest more > > on a >6 drive disk array, a fast SCSI controller (64bit, 66Mhz PCI) > > than on CPU power, if you had to choose (of course i'd have both!)
It'll be a bit harder to find new Athlon-MP boards/chips though as these aren't anymore in production as AMD favored towards Opteron for server boards (although you could order Athlon-MP boards from a vendor). Quite a good architecture that really maximizes the hardware but the Opteron comes at a premium price too (though not as sky-high as Power or SPARC equivalents). > a 320mb/s controller can have about 10 15krpm disks each having > sustained 30mbps bandwidth. am i right? > > how about the pci bus? 66mhz is some 6mBps for 1bit bus. so 192mB/s > for 32bit and 384mB/s for 64bit. from my lousy computations, it looks > like 10 disks, u320, and 64bit pci are a balanced io match. for some > 320 mbps or mBps ba? tama ba iniisip ko? > > and our ddr400 dual channel should do 8gb/s? Design constraints of Intel's board design gives it a severe penalty on transfer rates - you'd be lucky to even reach the 6gb/s transfer rate even for a dual channel setup. > how about the 100mbps NIC-to-NIC network between a database server and > an application server? has anyone seen that as the bottleneck? It won't be much of a bottleneck as the transfer speed is already much faster than the speed of writing the data to the disk. Unless of course you've got a lot of clients that would connect simultaneously to your database server constantly. -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
