Andrew Reid wrote: > > > Stroller wrote: > Ou of curiosity, is there a reason you didn't do > > `time dd if=/dev/zero of=zero.txt bs=1024 count=1000000 && time rm > > zero.txt` ? > > > >> This machine is serving as a print server, debian package mirror, > >> and a > >> mmysql database server. I am not sure what kind of info you might > >> need to > >> help me. But for starters, I'm running debian lenny with a 2.6.30 > >> kernel. > >> The file system is ext3. > > > > I'm not saying this is wholly the reason, but ext3 is notoriously slow > > at deletions. > > > > > > Simple reason, insufficient caffiene; I copy and pasted the command line > I used to test the commnad and then partially editted it to use the > OP's file name. > > For clarity the correct test is: > > dd if=/dev/zero of=zero.txt bs=1024 count=1000000; sync; echo 3 > > /proc/sys/vm/drop_caches ; sleep 15 ; time rm zero.txt; > > > On an xfs filessystem this gives: > > 1048576+0 records in > 1048576+0 records out > 1073741824 bytes (1.1 GB) copied, 11.3907 s, 94.3 MB/s > > real 0m0.023s > user 0m0.000s > sys 0m0.000s > > > 11 seconds create, 23 ms delete. YMMV
Randomly chose ext3 filesystem gives time dd if=/dev/zero of=zero.txt bs=1024 count=1000000; sync; echo 3 > /proc/sys/vm/drop_caches ; sleep 15 ; time rm -f zero.txt 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 19.9531 seconds, 51.3 MB/s real 0m20.603s user 0m0.525s sys 0m5.958s real 0m1.576s user 0m0.001s sys 0m0.073s -- ----------------------------------------------------------------------- Jeff Hanson - [email protected] - Field Technical Analyst You can choose a ready guide in some celestial voice. If you choose not to decide, you still have made a choice. You can choose from phantom fears and kindness that can kill; I will choose a path that's clear I will choose freewill. - Lee/Lifeson/Peart _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
