Hi, i wouldn't start a principal discussion, but i have too?
I have one Machine! and on this machine with identical Hardware, identical real! not same not side by side, real the same disk, processor, ram, board...... --> read my other postings, it's recommendet..... on this machine i have made 4 installations on same disk, of 4 types/Versions of Os'es 1: RELENG_4 2: RELENG_5 3: Drangonfly_REL_1.2 4: GENTOO_2005_02 The disk was alway same partitioning: first 1G for Swap rest for system then i login in the system and made: # cd /; /usr/bin/time dd if=/dev/zero bs=1024 count=1024k of=zerofile; rm zerofile then i install the next system from a dump on same disk.... so that i can compare the time-consumption on these 4 systems. i think dd ist not the best for performace-tests or something else, but dd is a handy tool for quick test what's going on with your system write/read-speedness. so other people have suggested me that dd was not everytime writes to the same parts of diske, while the underlying fs-drivers made other steps on other systems ( and other fs-types) I would only compare the performace from 2 Versions of FreeBSD, while i mean that the performance from RELENG_5 is more slower than under GENTOO and it is double as slow as under RELENG_4. i would not test the performance of my system, i would only compare..... best regards michael 2005/6/28, Daniel O'Connor <[EMAIL PROTECTED]>: > On Tue, 28 Jun 2005 20:43, Roman Neuhauser wrote: > > # [EMAIL PROTECTED] / 2005-06-28 19:04:18 +0930: > > > On Tue, 28 Jun 2005 18:51, Roman Neuhauser wrote: > > > > No you don't. You want to make a side-by-side comparison > > > > of two products, and if one of them underperforms, it just > > > > underperforms. You cannot use a poor location selection > > > > strategy in the driver as an excuse for poor operation. > > > > > > dd is a useful start, but you shouldn't read too much into the results > > > since, in general, dd doesn't reflect real world usage patterns. > > > > Huh? Various people have reacted to the "dd doesn't reflect real > > world" with "but I *do* use dd in real world". > > Read what I said.. > > "... IN GENERAL ..." > > -- > Daniel O'Connor software and network engineer > for Genesis Software - http://www.gsoft.com.au > "The nice thing about standards is that there > are so many of them to choose from." > -- Andrew Tanenbaum > GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C > > > _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
