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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Jim,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> We
extended asynchronous I/O functions that accumulate read/write requests for
multiple array variables by collective I/O mode in PnetCDF according to Rob
Ross’s suggest recently.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> We
implemented combining I/O operations for multiple array variables in pnetCDF.
This functionality can potentially be adopted by applications in two ways: (1)
explicitly using a new PnetCDF function that allow users to provide lists of
variables and write buffers as the arguments; and (2) implicitly using this
functionality by making multiple asynchronous I/O operations that accumulate
write requests for multiple variables. If the users post these operations as
asynchronous ones, the program will choose to not do any of the work until the
wait/waitall. And then the operations are combined into a larger aggregate
operation. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> The
functionality is implemented primarily and need further test.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
Thanks and regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kui.<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
parallel-netcdf-bounces@lists.mcs.anl.gov
[mailto:parallel-netcdf-bounces@lists.mcs.anl.gov] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Jim Edwards<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, May 05, 2009 10:25
AM<br>
<b><span style='font-weight:bold'>To:</span></b> parallel-netcdf@mcs.anl.gov<br>
<b><span style='font-weight:bold'>Subject:</span></b> async io</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi,<br>
<br>
What is the current status of adding async io operations to pnetcdf? <br>
<br>
Thanks,<br>
Jim<o:p></o:p></span></font></p>
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