* [ANNOUNCE] seekwatcher v0.11
@ 2008-04-14 15:49 Chris Mason
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From: Chris Mason @ 2008-04-14 15:49 UTC (permalink / raw
To: linux-kernel, linux-fsdevel
Hello everyone,
seekwatcher uses blktrace data to create IO graphs and movies. I mainly use
it to compare and tune filesystems under different workloads.
The main update in v0.11 is the ability to run blktrace for multiple block
devices. I'm using this for the btrfs multi-device code, but it can also
help figure out what lvm/md are doing to the underling block devices.
Example:
seekwatcher -t dd.trace -d /dev/sda1 -d /dev/sdb1 -o dd.png \
-p 'dd if=/dev/zero of=/mnt/file bs=1M count=4000'
Leads to something like this (the png below was 4 devices):
http://oss.oracle.com/~mason/seekwatcher/btrfs-raid0.png
It does a simple concatenation of the block numbers it finds in the blktrace
output, and sorts the traces from all the devices by time.
Other examples and download information are available here:
http://oss.oracle.com/~mason/seekwatcher/
-chris
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2008-04-14 15:49 [ANNOUNCE] seekwatcher v0.11 Chris Mason
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