[Pvfs2-users] PVFS2 Too Slow

[Nasr Y.M.J.O.]

Sorry I forgot to mention this in the just sent email. When I tried to build 
pvfs2 1.5.1, all the steps went through until I reached the step of creating 
the storage space:

# /opt/pvfs2/sbin/pvfs2-server /etc/pvfs2-fs.conf 
/etc/pvfs2-server.conf-<frontend> -f
PVFS2......starting
[E....] (null): Berkeley DB library configured to support only DB_PRIVATE 
environments
[E....] dbpf_getdb_env(//pvfs2-storage-space/....../):Invalid argument

thanks
nasr


>From: Murali Vilayannur <vilayann at mcs.anl.gov>
>To: "Nasr Y.M.J.O." <nasr974 at hotmail.com>
>CC: pvfs2-users at beowulf-underground.org
>Subject: Re: [Pvfs2-users] PVFS2 Too Slow
>Date: Sun, 17 Sep 2006 10:14:21 -0500 (CDT)
>
>Hi Nasr,
>
> > This is my first experience with parallel filesystems. I compiled PVFS2
> > 1.3.2 into a Rocks 4.1 cluster (Centos 4.2) following the quick start 
>guide.
> > No errors encountered and all tests passed. My cluster is 1 frontend + 7
> > compute nodes. I did the configuration so the frontend will act as a 
>meta
> > data server as well as a client. All the 7 compute nodes act as IO 
>servers
> > and clients.
> >
> > When I tried to test the kernel space by making a directory (e.g., mkdir
> > /pvfs2/user) it tooks around 5 minutes to do that and the desktop panic.
> > Similarly, when I ssh to one of the compute nodes and I run any command
> > (e.g., ls, mkdir...).
> >
> > Is there any way to improve the performance? Im attaching below the 
>steps
> > and configuration I followed in case I missed something. Apologies for 
>the
> > long email.
> >
> > PS: I chose pvfs2 1.3.2 since I had an error when installing 1.5.1
> > complaining about db (invalid argument). No changes in the configuration
> > files generated by genconfig were made.
>
>
>All the steps that you did look ok. However, pvfs2-1.3.2 is fairly old
>and a lot of performance and stability fixes have gone in to our releases
>since then.
>Let's try to figure out why pvfs2 1.5.1 does not build for you
>and then diagnose performance/stability issues from there..
>Can you find out what version of berk db is installed on your cluster?
>Perhaps our configure checks need to be tweaked on your setup to detect
>things correctly..
>thanks for the reports!
>Murali

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