the default is simple stripe, which does the traditional round-robin
striping you're probably most familiar with. twod_stripe is a two-
dimensional striping pattern used to combat incast.
rob
On Jan 15, 2008, at 8:58 PM, Wang Yu wrote:
Okay. Thanks!
Well, what is the difference among basic_dist, simple_stripe and
twod_stripe? and what is the default of pvfs2, is it
simple_stripe(stripe across all IO servers)?
Thanks!
On Jan 16, 2008 10:12 AM, Rob Ross <[EMAIL PROTECTED]> wrote:
http://www.pvfs.org/doc/pvfs2-faq/
index.php#SECTION00075000000000000000
6.5.2 Distribution parameters
Some distributions allow you to set parameters that impact how the
distribution behaves. These parameters can be set as follows:
prompt# setfattr -n "user.pvfs2.dist_params" -v "strip_size:4096" /
mnt/
pvfs2/directory
You can specify more than one "parameter:value" pair by seperating
them with commas.
6.5.3 Number of datafiles
You can also specify the number of datafiles to stripe across:
prompt# setfattr -n "user.pvfs2.num_dfiles" -v "1" /mnt/pvfs2/
directory
PVFS defaults to striping files across each server in the file system.
However, you may find that for small files it is advantages to limit
each file to only a subset of servers (or even just one).
On Jan 15, 2008, at 8:01 PM, Wang Yu wrote:
> Hi, all
> Now I have three IO servers and one metadata server and multiple
> clients. When I write a file in one client, how can I control this
> file is stored into one IO server or all IO servers. Namely, how do
> single and stripe storage pattern in pvfs2 work? and how to tune the
> stripe size?
> Would you please tell me about the storage pattern of pvfs2? or some
> documents will be appreciated!
> Thanks!
>
> --
> National Research Center for Intelligent Computing Systems
> Institute of Computing Technology, Chinese Academy of Sciences
> _______________________________________________
> Pvfs2-users mailing list
> [email protected]
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--
National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
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