h1. IO monitoring

iotop -qqqtok|cut -c-100

http://www.xaprb.com/blog/2009/08/23/how-to-find-per-process-io-statistics-on-linux/
> echo 1 > /proc/sys/vm/block_dump
> look at dmesg

http://lserinol.blogspot.com/2009/09/io-usage-per-process-on-linux.html
/proc/self/io

http://yong321.freeshell.org/freeware/pio.html#linux
pio

http://serverfault.com/questions/50127/how-to-automatically-run-a-script-when-the-contents-of-a-directory-changes-in-li
http://stackoverflow.com/questions/1183023/tool-which-shows-me-which-files-are-written-in-linux
http://www.ibm.com/developerworks/linux/library/l-ubuntu-inotify/
http://inotify.aiken.cz/?section=inotify&page=faq&lang=en
apt-get install inotify-tools

systemtap
http://sourceware.org/systemtap/
http://www.sourceware.org/systemtap/examples/keyword-index.html
http://rackerhacker.com/2010/12/07/tap-into-your-linux-system-with-systemtap/
iotime.stp