Collective H5 calls

Hdf-forum archives
1

I was wondering about collective H5 calls (and perhaps the definition of
collective MPI calls). Is the idea that every process in MPI_comm_world must
participate (i.e. EVERY available processor) , or every process in a given
communicator?
Izaak Beekman

···

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On Tue, Aug 9, 2011 at 12:00 PM, <hdf-forum-request@hdfgroup.org> wrote:

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Today's Topics:

  1. Re: XZ filter identity (Elena Pourmal)
  2. Re: XZ filter identity (Jerome BENOIT)
  3. filter module (Jerome BENOIT)

---------- Forwarded message ----------
From: Elena Pourmal <epourmal@hdfgroup.org>
To: g6299304p@rezozer.net, HDF Users Discussion List <
hdf-forum@hdfgroup.org>
Date: Mon, 8 Aug 2011 23:08:11 -0500
Subject: Re: [Hdf-forum] XZ filter identity
Jerome,

XZ compression filter is not currently registered with The HDF Group. To
make it available to others you will need to register the filter with us and
get an identifier.

To request a filter identifier please contact help@hdfgroup.org
with the following information

# Contact information for developer requesting the new identifier
# Short description of the new filter
# Links to any relevant information including licensing information

Currently there are four filters registered with The HDF Group.

*List of Filters Registered with The HDF Group*
  *Filter identifier* *Name* *Short Description* 305 LZO LZO lossless
compression used by PyTables 307 BZIP2 BZIP2 lossless compression used
by PyTables 32000 LZF LZF lossless compression used by H5Py project
32001 BLOSC Blosc lossless compression used by PyTables
Thanks,

Elena

On Aug 8, 2011, at 12:46 PM, Jerome BENOIT wrote:

Hello List:

I am implementing a XZ filter:
I wondering if there is an unofficial filter identifier for XZ
as there is for bz2 ?

Thanks in advance,
Jerome

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

---------- Forwarded message ----------
From: Jerome BENOIT <g6299304p@rezozer.net>
To:
Date: Tue, 09 Aug 2011 07:43:23 +0200
Subject: Re: [Hdf-forum] XZ filter identity
Thanks.

Jerome

On 09/08/11 06:08, Elena Pourmal wrote:

Jerome,

XZ compression filter is not currently registered with The HDF Group. To
make it available to others you will need to register the filter with us and
get an identifier.

To request a filter identifier please contact help@hdfgroup.org
with the following information

# Contact information for developer requesting the new identifier
# Short description of the new filter
# Links to any relevant information including licensing information

Currently there are four filters registered with The HDF Group.

*List of Filters Registered with The HDF Group*
*Filter identifier* *Name* *Short Description*
305 LZO LZO lossless compression used by PyTables
307 BZIP2 BZIP2 lossless compression used by PyTables
32000 LZF LZF lossless compression used by H5Py project
32001 BLOSC Blosc lossless compression used by PyTables

Thanks,

Elena

On Aug 8, 2011, at 12:46 PM, Jerome BENOIT wrote:

Hello List:

I am implementing a XZ filter:
I wondering if there is an unofficial filter identifier for XZ
as there is for bz2 ?

Thanks in advance,
Jerome

______________________________**_________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org <mailto:Hdf-forum@hdfgroup.org**>
http://mail.hdfgroup.org/**mailman/listinfo/hdf-forum_**hdfgroup.org<http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org>

---------- Forwarded message ----------
From: Jerome BENOIT <g6299304p@rezozer.net>
To: HDF Users Discussion List <hdf-forum@hdfgroup.org>
Date: Tue, 09 Aug 2011 07:44:28 +0200
Subject: [Hdf-forum] filter module
Hello List:

Is there any project for porting filter module to HDF5 ?

Greetings,
Jerome

_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@hdfgroup.org
http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org

2

Collective routines take a communicator as one of the arguments: all
processes in that communicator must participate.

I/O routines are a little different, as the communicator was specified
at open time, but again, all processes who participated in open need
to participate in the collective i/o.

similarly, in hdf5 you associate a communicator with an hdf5 file
(H5Pset_fapl_mpio). Does not have to be MPI_COMM_WORLD.

==rob

···

On Thu, Aug 11, 2011 at 03:33:16PM -0400, Izaak Beekman wrote:

I was wondering about collective H5 calls (and perhaps the definition of
collective MPI calls). Is the idea that every process in MPI_comm_world must
participate (i.e. EVERY available processor) , or every process in a given
communicator?

--
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA