[Hdf-forum] question about 1.10 scheduling, swmr concurrency

Quincey Koziol koziol at hdfgroup.org
Wed Sep 14 08:31:04 CDT 2011


*sigh* I meant this message to only go to Gabriel.  _Please_ don't grab the code in the URL below without talking to me - the files it produces _WILL NOT WORK_ with past/current/future versions of HDF5.

	Quincey

On Sep 14, 2011, at 8:26 AM, Quincey Koziol wrote:

> Hi Gabriel,
> 
> On Sep 12, 2011, at 8:46 AM, Gabriel Corneanu wrote:
> 
>> Hi Quincey,
>> 
>>> 	We're still shooting for a beta release of 1.10.0 around November of this year.  I can point you at some alpha >quality code, if you are interested in test-driving what's available now and won't keep any of the files produced.
>> 
>>> 	Quincey
>> 
>> Sorry, I was in holiday.
>> 
>> Yes, I would really like to get an impression about it... Of course I
>> won't keep data, I just want to prepare my wrappers...
>> If possible, my email is gabriel.corneanu AT gmail DOT com
> 
> 	OK, you can use SVN to check out a current version of the SWMR code from this URL:
> 
> http://svn.hdfgroup.uiuc.edu/hdf5/branches/revise_chunks/
> 
> 	The main feature currently enabled is that when the "latest" version of the file format is used and a dataset is extended, the writer can do this without coordination with the reader (as long as they share a POSIX compatible file system - which NFS is _not_).  Take a look at the "swmr_writer.c" and "swmr_reader.c" code in the test subdirectory for how to enable and leverage this behavior.  Eventually, all metadata modifications will be supported for SWMR access, not just extending datasets.
> 
> 	Quincey
> 
> 
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