Hi to everyone.
This is my first post and regretfully is to ask for help.
I'm doing a performance evaluation of Distributed Parallel Filesystems,
using iozone. The filesystems tested are Lustre, PVFS2 and GlusterFS. This
evaluation has an aim: to choose a parallel filesystem for a video streamig
system storage server.
But I've a problem; when iozone test is running over pvfs2 it fails at a
point where the file size is 2 GB and the Record Lenght 64 Kb.
My tested is this:
[EMAIL PROTECTED] ~]# pvfs2-statfs -h -m /mnt/pvfs2/
aggregate statistics:
---------------------------------------
fs_id: 1965017224
total number of servers (meta and I/O): 4
handles available (meta and I/O): 4294967286
handles total (meta and I/O): 4294967290
bytes available: 111.3G
bytes total: 111.3G
NOTE: The aggregate total and available statistics are calculated based
on an algorithm that assumes data will be distributed evenly; thus
the free space is equal to the smallest I/O server capacity
multiplied by the number of I/O servers. If this number seems
unusually small, then check the individual server statistics below
to look for problematic servers.
meta server statistics:
---------------------------------------
server: tcp://redhat02:3334
RAM total : 756.9M
RAM free : 372.1M
uptime : 2 hours, 12 minutes
load averages : 0 0 0
handles available: 1717986912
handles total : 1717986916
bytes available : 28.2G
bytes total : 34.3G
mode: serving both metadata and I/O data
I/O server statistics:
---------------------------------------
server: tcp://redhat02:3334
RAM total : 756.9M
RAM free : 372.1M
uptime : 2 hours, 12 minutes
load averages : 0 0 0
handles available: 1717986912
handles total : 1717986916
bytes available : 28.2G
bytes total : 34.3G
mode: serving both metadata and I/O data
server: tcp://redhat03:3334
RAM total : 488.2M
RAM free : 10.4M
uptime : 2 hours, 09 minutes
load averages : 2784 10592 5536
handles available: 858993458
handles total : 858993458
bytes available : 27.8G
bytes total : 33.9G
mode: serving only I/O data
server: tcp://redhat04:3334
RAM total : 1003.6M
RAM free : 605.3M
uptime : 2 hours, 07 minutes
load averages : 4096 1312 224
handles available: 858993458
handles total : 858993458
bytes available : 64.3G
bytes total : 70.4G
mode: serving only I/O data
server: tcp://redhat05:3334
RAM total : 488.2M
RAM free : 96.7M
uptime : 2 hours, 05 minutes
load averages : 0 0 0
handles available: 858993458
handles total : 858993458
bytes available : 27.8G
bytes total : 33.9G
mode: serving only I/O data
###############################################################################
Therefore my cluster has 1 metadata server, 4 IO servers and 1 client.
The iozone test command is this:
[EMAIL PROTECTED] ~]# iozone -Rab /home/pvfs2/Desktop/salida-
redhat02-test03.xls -g 4G -f /mnt/pvfs2/iozone-file.tmp -U /mnt/pvfs2
and the message error is this:
fsync: Bad file descriptor
###############################################################################
Why I did chose IOzone? because his variety of tests and the excel output
options.
If anyone can help me telling me why i've this message error and how can i
resolve this, it would be great.
Thanks a lot, cheers.
--
Gonzalo Soto Subiabre
Computer Engineer. FVT Chile Ltda.
[EMAIL PROTECTED]
msn: [EMAIL PROTECTED]
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