On 07/07/2010 03:04 PM, phil cryer wrote:
We set up a small test case in our environment to test Gluster / ext4 in a
simple 4-node client-replication setup. After running it through the
regular Bonnie / IOZone / FFSB tests, we determined that it _worked_, but
that compared to ext3, we saw some strange timing results overall (wierd lag
spikes, etc). Unfortunately the project was scrapped early on (for external
reasons), and no further investigation was done. YMMV.
I'm running ext4 on my gluster cluster, can you share some of the
data, or methods/commands you ran? I'd be happy to spec out what ext4
looks like for me (we're just hosting files for web access, so we're
expecting it to be able to handle it), and post the results online to
share.
Nothing special, frankly, but sure :
Filecreation :
http://nfsv4.bullopensource.org/tools/tests_tools/test_files.py
with script :
#!/bin/bash
LOOP=0
while [ $LOOP -lt 1000 ]
do
# tee and cat are optional for user views only, of course
# test_files.py edited to point to gluster mount
time ./test_files.py | tee -a go_test_files.log
cat ./test_files_orw | tee -a go_test_files.log
let LOOP=$LOOP+1
done
FFSB (# yum install ffsb)
with configs as supplied by the package (see shared docs), with configs
modified to point to gluster mount :
profile_appends
profile_largefile_random_read
profile_largefile_sequential_read
profile_smallfile_reads
profile_stress_test
IOZone (# yum install iozone)
with script :
#!/bin/bash
loop=0
while [ $loop -lt 100 ]
do
# tee optional, of course
/usr/bin/iozone -ace -f /opt/gluster/iozone | tee -a
iozone-stress.log
let loop=$loop+1
done
Bonnie++ (# yum install bonnie++)
with script :
#!/bin/bash
loop=0
while [ $loop -lt 100 ]
do
# tee optional
(time /usr/sbin/bonnie++ -d /opt/gluster/bonnie -u root) 3>&1
2>&3 | tee -a bonnie.log
let loop=$loop+1
done
We ran that exact suite, on all fedora systems, the only difference
being that the client and server FS's were formatted ext3 during the
first run through, and ext4 during the next.
Hope that helps...
--
Daniel Maher <dma+gluster AT witbe DOT net>
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