Becky & Kyle-
The FS IDs are different for the two filesystems, as are the Names. An
ls of the storage directory shows one directory for each fs:
r...@wongburger:/etc# ls /pvfs2-storage-multi/
0f7d1736 0f7d1737 collections.db storage_attributes.db
From all the reading I've done and your replies to this thread, it
looks like I need to start one server for each filesytem I want to
share, each with its own config file and storage space. Is that right?
Thanks,
-crispy
On 10/20/2010 03:39 PM, Kyle Schochenmaier wrote:
Hi Chris -
I loosely recall there being some sort of FS ID flag that needs to be set
uniquely for each filesystem in the config files, we used to have 3 or 4
server processes running at the same time on different filesystems.
Kyle Schochenmaier
On Wed, Oct 20, 2010 at 2:35 PM, Becky Ligon<[email protected]> wrote:
I've never tried to do this before, but to start, I would try defining
separate storage spaces for each filesystem. Curious, when you run the
server with the -f option, exactly which directories are created? Can you
send me the output from an "ls"?
Another tip is to make each server both meta and IO. You want to spread
out the metadata just like you do for the streamed data. Having one
server handle the metadata will become a bottleneck in a high performance
environment.
Becky
--
Becky Ligon
PVFS Developer
Clemson University
864-650-4065
I'd like to set up two shares to be managed by the same PVFS server.
I've read in the docs that I can have multiple filesystem entries in
pvfs2-fs.conf, but I haven't been able to successfully do this. Does
someone have an example config file with multiple filesystem entries
that they can share?
More details:
I've successfully set up a single share based on the quick start guide.
It's a four-node network: one metadata server, four i/o nodes. Nodes are
identical, each 6x dual-core xeon, LAN connection, running ubuntu lucid.
To generate the two-filesystem config file, I ran pvfs2-genconfig twice,
then pasted the filesystem section from the second file into the first,
making sure the Name and ID fields were unique. This was based on 3.9 in
the PVFS2 FAQ, "Can I mount more than one PVFS file system on the same
client?"
Using the two-filesystem config file, pvfs2-server -f works, but then
pvfs2-server (with or without -d) ends immediately with a segfault.
Nothing is written to the console or logfiles. I tried a different
version of pvfs2-fs.conf with non-overlapping MetaHandleRange and
DataHandleRange values for the two filesystems, but as I'm not exactly
clear on what these do I'm not sure if that's the right approach. I've
attached the conf file for a single-server test of two filesystems, with
separate Range value.
Thanks,
-crispy
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