Dear Phil,
Its looking good now on a single node test - I will expand to a 16 node
test next...
The twod_stripe distribution is still seeing the errors about 2 groups I
sent in my
last email, but the file is created anyhow.
In that regard, does someone have a good explanation of the 2D stripe & how
it works, i.e. what the "num_groups" and "group_strip_factor" do to
change the
stripe behavior? The only comment I could find was that the distribution is
designed to combat incast, but I can't find a reference to what "incast" is
either!
Many, Many thanks,
Tony
Tony Kew
SAN Administrator
The Center for Computational Research
New York State Center of Excellence
in Bioinformatics & Life Sciences
701 Ellicott Street, Buffalo, NY 14203
CoE Office: (716) 881-8930 Fax: (716) 849-6656
CSE Office: (716) 645-3797 x2174
Cell: (716) 560-0910 Home: (716) 874-2126
"I love deadlines, I love the whooshing noise they make as they go by."
Douglas Adams
Phil Carns wrote:
The attached patch depends on the previous one, but this one
specifically fixes the varstrip directory hints issue. This has been
applied in cvs trunk as well.
I didn't take Murali's patch verbatim, but the idea is basically the
same. The varstrip params have to be parsed as a special case in the
code that handles directory hints because it uses a different
parameter format than the other distributions.
-Phil
I'll look into the varstrip issue soon.
-Phil
Tony Kew wrote:
Dear PVFS users list,
Mounting a pvfs 7.2.1, creating directories and setting the
distribution
type with setfattr for each directory, only simple_stipe and
twod_stripe
would allow me to write a file in the given directory.
Adding the varstrip_dist xattrs patch from Murali Vilayannur
attached to
this message thread:
http://osdir.com/ml/file-systems.pvfs2.users/2007-01/msg00050.html
fixes the variable strip distibution, but the basic distribution still
doesn't work for me.
The patch adds
#include "pvfs2-dist-basic.h
to src/client/sysint/sys-create.sm so I wonder if no one has tried
this...???
Perhaps there is a little more code needed to make basic_dist work with
xargs?
The patch above is against 2.6, but works (and is needed for
varstrip_dist
with xargs) with 7.2.1 & the latest cvs (best I can tell) - perhaps
this patch
could be added to both?
Let me know if there is useful debug info I can provide...
Thanks Much
Tony
Tony Kew
SAN Administrator
The Center for Computational Research
New York State Center of Excellence
in Bioinformatics & Life Sciences
701 Ellicott Street, Buffalo, NY 14203
CoE Office: (716) 881-8930 Fax: (716) 849-6656
CSE Office: (716) 645-3797 x2174
Cell: (716) 560-0910 Home: (716) 874-2126
"I love deadlines, I love the whooshing noise they make as they go by."
Douglas Adams
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