[Pvfs2-users] storage pattern of PVFS2
wangyuict at gmail.com
Tue Jan 15 21:58:57 EST 2008
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)?
On Jan 16, 2008 10:12 AM, Rob Ross <rross at mcs.anl.gov> wrote:
> 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/
> 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
> > _______________________________________________
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> > Pvfs2-users at beowulf-underground.org
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National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
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