Hi Murali,
I'm confused about something. If Emmanuel is just using cp and mv,
why are there multiple segments in the iovec?
Thanks,
-sam
On Sep 21, 2007, at 9:08 AM, Murali Vilayannur wrote:
Emmanuel,
THat case hasn't been implemented unfortunately..It proved to be a
little bit more
complicated at the time I wrote it..
I did not realize that there is a need or use case for nr_segs > 1.
Hmm. Until we get the fully correct solution,
one temporary kludge is to open pvfs2-config.h and comment out the
line
#define HAVE_COMBINED_AIO_AND_VECTOR 1
and then rebuild the kernel module (using make kmod)
Hope this works,
thanks,
Murali
On 9/20/07, Emmanuel Florac <[EMAIL PROTECTED]> wrote:
Hello,
I've built a small PVFS2 cluster and it works fine -- mostly...
Here is the basic cluster setup : 2 dual core Xeon machines, 2GB
RAM, 2 TB disks as server nodes. Running Debian Etch with a custom
2.6.20.7 SMP kernel built from kernel.org vanilla source.
I compiled PVFS 2.6.3, with the 2.6.21 patch applied (it wouldn't
compile as is).
PVFS2 works just fine, local performance is OK.
I'd need to share the PVFS2 filesystem thru NFS to some clients.
Reading just works, however writing constantly fails with this
error :
Sep 19 18:36:53 triangle
kernel: /usr/sarge64/usr/src/pvfs-2.6.3/src/kernel/linux-2.6/file.c
line 1923: pvfs2_file_aio_write_iovec: not implemented yet (aio
with 7
segments)
Then the file created is either of zero size, or filled with 0x00.
I've tried many configurations : sharing from a PVFS2
both server and client node, from a PVFS2 client-only node, with
uniprocessor and smp kernel, forced NFS version 2, no luck.
Writing thru CIFS (Samba), FTP, scp works perfectly.
I tentatively edited the file.c source code by commenting out the
test
that spits the error out. With this modified kernel module, writing
thru NFS works _most_of_the_time_. It fails apparently randomly from
time to time while writing big files ( 500MB to 1GB).
Any help would be greatly welcomed....
--
----------------------------------------
Emmanuel Florac | Intellique
----------------------------------------
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