Hi Rob<br>Well.. after the answer of Sam, I ran a new iozone test over my PVFS2 cluster, and in this time, following the advices from Sam about to run only the read tests without the -U option (mount/unmount volume), and the results were satisfactory; the test ended succesfuly and I was able to finish the benchamrking over pvfs2. Below I will specify the iozone command, including the options used:
<br><br># iozone -Rab /home/pvfs2/Desktop/salida-redhat04-test05.xls -g 4G -i 1 -i 2 -i 3 -i 5 -i 7 -i 10 -i 12<br><br> -R : print a excel type report.<br> -a : full automatic mode: produce tests using a wide ranging of record and file sizes.
<br> -b : it create a binary file format file in Excel compatible output report.<br> -g : set maximum file size for -a mode. In this case -g 4G.<br> -i : it specify which test to run. In this case only the read type tests.
<br> 1 : read/reread.<br> 2 : random read/write.<br> 3 : read-backwards.<br> 5 : stride-read.<br> 7 : fread/Re-fread<br> 10 : pread/Re-pread<br> 12 : preadv/Re-preadv<br><br>I still don't analyze the results, but they are in a expected range.
<br>I thank the help from Sam Lang and Rob Ross, and from the entirely pvfs2 user community <br>Kind Regards<br><br>Gonzalo<br clear="all"><br><br><div class="gmail_quote">On Nov 5, 2007 10:56 AM, Rob Ross <<a href="mailto:rross@mcs.anl.gov" target="_blank">
rross@mcs.anl.gov</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Thanks Gonzalo. While we're gathering this info, are you running GigE?<br>We'll want to know, once things are working correctly, to know if<br>performance is in-line.<br><div><br>Rob<br><br>Gonzalo Soto Subiabre wrote:
<br></div><div>> Hello.<br>><br>> I'm using:<br>> - pvfs-2.6.3.<br>> - kernel 2.6.9-5.EL.<br>> - i686 CPU architecture and<br>> - Ethernet TCP/IP.<br>><br>><br>><br>> On Nov 4, 2007 7:46 PM, Rob Ross <
<a href="mailto:rross@mcs.anl.gov" target="_blank">rross@mcs.anl.gov</a><br></div><div><div></div><div>> <mailto:<a href="mailto:rross@mcs.anl.gov" target="_blank">rross@mcs.anl.gov</a>>> wrote:<br>><br>> Hi,
<br>>
<br>> Can you tell us what version of PVFS, what kernel, what CPU<br>> architecture, what network you're using?<br>><br>> Thanks,<br>><br>> Rob<br>><br>> Gonzalo Soto Subiabre wrote:
<br>> > Hi to everyone.<br>> ><br>> > This is my first post and regretfully is to ask for help.<br>> > I'm doing a performance evaluation of Distributed Parallel<br>> Filesystems,
<br>> > using iozone. The filesystems tested are Lustre, PVFS2 and GlusterFS.<br>> > This evaluation has an aim: to choose a parallel filesystem for a<br>> video<br>> > streamig system storage server.
<br>> > But I've a problem; when iozone test is running over pvfs2 it<br>> fails at a<br>> > point where the file size is 2 GB and the Record Lenght 64 Kb.<br>> ><br>> >
<br>> > My tested is this:<br>> ><br>> > [root@redhat03 ~]# pvfs2-statfs -h -m /mnt/pvfs2/<br>> > aggregate statistics:<br>> > ---------------------------------------
<br>> ><br>> > fs_id: 1965017224<br>> > total number of servers (meta and I/O): 4<br>> > handles available (meta and I/O): 4294967286<br>> > handles total (meta and I/O): 4294967290
<br>> > bytes available: 111.3G<br>> > bytes total: 111.3G<br>> ><br>> > NOTE: The aggregate total and available statistics are calculated
<br>> based<br>> > on an algorithm that assumes data will be distributed evenly; thus<br>> > the free space is equal to the smallest I/O server capacity<br>> > multiplied by the number of I/O servers. If this number seems
<br>> > unusually small, then check the individual server statistics below<br>> > to look for problematic servers.<br>> ><br>> > meta server statistics:<br>> > ---------------------------------------
<br>> ><br>> > server: tcp://redhat02:3334<br>> > RAM total : 756.9M<br>> > RAM free : 372.1M<br>> > uptime : 2 hours, 12 minutes
<br>> > load averages : 0 0 0<br>> > handles available: 1717986912<br>> > handles total : 1717986916<br>> > bytes available : 28.2G<br>> > bytes total :
34.3G<br>> > mode: serving both metadata and I/O data<br>> ><br>> ><br>> > I/O server statistics:<br>> > ---------------------------------------<br>> >
<br>> > server: tcp://redhat02:3334<br>> > RAM total : 756.9M<br>> > RAM free : 372.1M<br>> > uptime : 2 hours, 12 minutes<br>> > load averages : 0 0 0
<br>> > handles available: 1717986912<br>> > handles total : 1717986916<br>> > bytes available : 28.2G<br>> > bytes total : 34.3G<br>> > mode: serving both metadata and I/O data
<br>> ><br>> > server: tcp://redhat03:3334<br>> > RAM total : 488.2M<br>> > RAM free : 10.4M<br>> > uptime : 2 hours, 09 minutes
<br>> > load averages : 2784 10592 5536<br>> > handles available: 858993458<br>> > handles total : 858993458<br>> > bytes available : 27.8G
<br>> > bytes total : 33.9G<br>> > mode: serving only I/O data<br>> ><br>> > server: tcp://redhat04:3334<br>> > RAM total : 1003.6M
<br>> > RAM free : 605.3M<br>> > uptime : 2 hours, 07 minutes<br>> > load averages : 4096 1312 224<br>> > handles available: 858993458
<br>> > handles total : 858993458<br>> > bytes available : 64.3G<br>> > bytes total : 70.4G<br>> > mode: serving only I/O data<br>> >
<br>> > server: tcp://redhat05:3334<br>> > RAM total : 488.2M<br>> > RAM free : 96.7M<br>> > uptime : 2 hours, 05 minutes<br>> > load averages : 0 0 0
<br>> > handles available: 858993458<br>> > handles total : 858993458<br>> > bytes available : 27.8G<br>> > bytes total : 33.9G<br>> > mode: serving only I/O data
<br>> ><br>> ><br>> ###############################################################################<br>> ><br>> > Therefore my cluster has 1 metadata server, 4 IO servers and 1
<br>> client.<br>> ><br>> > The iozone test command is this:<br>> > [root@redhat02 ~]# iozone -Rab<br>> > /home/pvfs2/Desktop/salida-redhat02-test03.xls -g 4G -f<br>> > /mnt/pvfs2/iozone-
file.tmp -U /mnt/pvfs2<br>> ><br>> > and the message error is this:<br>> > fsync: Bad file descriptor<br>> ><br>> ><br>> ###############################################################################
<br>> ><br>> ><br>> > Why I did chose IOzone? because his variety of tests and the excel<br>> > output options.<br>> > If anyone can help me telling me why i've this message error and
<br>> how can<br>> > i resolve this, it would be great.<br>> > Thanks a lot, cheers.<br>> ><br>> ><br>> > --<br>> > Gonzalo Soto Subiabre<br>> > Computer Engineer. FVT Chile Ltda.
<br>> > <a href="mailto:gsotosubiabre@gmail.com" target="_blank">gsotosubiabre@gmail.com</a> <mailto:<a href="mailto:gsotosubiabre@gmail.com" target="_blank">gsotosubiabre@gmail.com</a>><br></div></div>> <mailto:
<a href="mailto:gsotosubiabre@gmail.com" target="_blank">
gsotosubiabre@gmail.com</a> <mailto:<a href="mailto:gsotosubiabre@gmail.com" target="_blank">gsotosubiabre@gmail.com</a>>><br><div>> > msn: <a href="mailto:gonza_101@hotmail.com" target="_blank">gonza_101@hotmail.com
</a>
<mailto:<a href="mailto:gonza_101@hotmail.com" target="_blank">gonza_101@hotmail.com</a>><br></div>> <mailto:<a href="mailto:gonza_101@hotmail.com" target="_blank">gonza_101@hotmail.com</a> <mailto:<a href="mailto:gonza_101@hotmail.com" target="_blank">
gonza_101@hotmail.com</a>>><br><div>> ><br>> ><br>> ><br>> ------------------------------------------------------------------------<br>><br>> ><br>
> > _______________________________________________<br>> > Pvfs2-users mailing list<br>> > <a href="mailto:Pvfs2-users@beowulf-underground.org" target="_blank">Pvfs2-users@beowulf-underground.org
</a><br></div>
> <mailto:<a href="mailto:Pvfs2-users@beowulf-underground.org" target="_blank">Pvfs2-users@beowulf-underground.org</a>><br><div>> > <a href="http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users" target="_blank">
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users</a><br>><br>><br>><br>><br>> --<br>> Gonzalo Soto Subiabre<br></div><div><div></div><div>> <a href="mailto:gsotosubiabre@gmail.com" target="_blank">
gsotosubiabre@gmail.com</a> <mailto:<a href="mailto:gsotosubiabre@gmail.com" target="_blank">gsotosubiabre@gmail.com</a>><br>> msn: <a href="mailto:gonza_101@hotmail.com" target="_blank">gonza_101@hotmail.com</a>
<mailto:<a href="mailto:gonza_101@hotmail.com" target="_blank">
gonza_101@hotmail.com</a>><br></div></div></blockquote></div>