Re: sysbench threading performance problems

> What parameters to sysbench are you using and is the data set being > tested large enough to blow out the system caches? Pretty much defaullt: sysbench --num-threads=1 --test=fileio --file-test-mode=seqrd run Im not sure if the defaults are sane or insane. The only difference between

First file to look at in dragonfly src tree

Hi guys, I just checked out the dragonfly src tree from avalon and was wondering which source file you all would recommend to look at first to get a feel for how the kernel and system works. I supposed wherever 'int main' is, right? Thanks in advance, Vivek

Re: [PATCH] mount_tmpfs command

:Hi again, : :Oops, it was not correct one. please use this version. : :Silly me for confusion. thank you, :- Naoya Committed! -Matt

Re: sysbench threading performance problems

:However whats interesting is DF performance in the fileio/seqrd benchmark :with one thread. DF seems to be about 4 times slower. But when you add 2nd :thread it almost catches up with FBSD. What parameters to sysbench are you using and is the data set being tested large enough to blow ou

Re: UPDATE: HAMMER and PostgreSQL Performance

Yah, lets see how it fares now that the random I/O read-ahead issue in cluster_read() has been fixed. Just stick with fsync_mode=3 (which is equivalent to what UFS does but requires even fewer discrete media writes). The fsync modes have been completely revamped as of late 2.5

UPDATE: HAMMER and PostgreSQL Performance

Attached is the latest (again not yet finished) version of the benchmarking I am doing on DF/HAMMER with PostgreSQL. I am compiling new numbers atm based on the SILI based adapter I just got donated from Matt. But as there was auite some interest on IRC I decided to put this intermediate version ou

Re: sysbench threading performance problems

However whats interesting is DF performance in the fileio/seqrd benchmark with one thread. DF seems to be about 4 times slower. But when you add 2nd thread it almost catches up with FBSD.

sysbench threading performance problems

Hi, Im trying to benchmark DF with sysbench and got 2 issues: The cpu and OLTP (using mysql) benchmarks are ridiculously slow. ie. with one thread they take minutes to complete while on freebsd its a matter of seconds. Can someone verify this? I dont know if its sysbench or DragonFly bug. Petr

Re: How to use hammer volume-add and volume-del

2010/4/7 lhmwzy > # uname -a > DragonFly . 2.6-RELEASE DragonFly v2.6.1-RELEASE #1: Sun Apr 4 > 19:50:41 PDT 2010 > r...@test28.backplane.com:/usr/obj/usr/src-misc/sys/GENERIC i386 > > # hammer volume-del /dev/da1 /usr > hammer volume-del ioctl: Invalid argument > /usr is not a valid HAMMER fi

Re: How to use hammer volume-add and volume-del

# uname -a DragonFly . 2.6-RELEASE DragonFly v2.6.1-RELEASE #1: Sun Apr 4 19:50:41 PDT 2010 r...@test28.backplane.com:/usr/obj/usr/src-misc/sys/GENERIC i386 # hammer volume-del /dev/da1 /usr hammer volume-del ioctl: Invalid argument when added a disk,can't be removed. another question,the same