[Trilinos-Users] Question about the usage of example program in Aztecoo

[Heroux, Michael A]

Keita,

The partition file is an argument that is either a single integer value or a file of integer values.  In the first case, the integer will be used to block the input matrix (which is in Harwell-Boeing format) by a constant block size.  In the second case, the file will contain the value 0 in the first line followed by list of integers, one per line, where the last integer value equals the number of equations in the matrix.  For example if you have a matrix with 10 equations and you want to block them with block sizes of 2, 3, 3, 2, you would want have a partition file with the following values:

0
2
5
8
10

Mike


On 3/16/09 3:20 PM, "Keita Teranishi" <keita at cray.com> wrote:

Hi,

I'd like to make a correction to the last email:
Trilinos_Util_read_hb for reading matrix data
Trilinos_Util_create_vbr for partitioning data, and I am not sure about the usage of Trilinos_Util_create_vbr.

Thanks,

================================
 Keita Teranishi
 Scientific Library Group
 Cray, Inc.
 keita at cray.com
================================


From: Keita Teranishi
Sent: Monday, March 16, 2009 3:11 PM
To: 'trilinos-users at software.sandia.gov'
Cc: Jason Slemons
Subject: Question about the usage of example program in Aztecoo

Hi,

I have been trying to use vbr_main.cpp in trilinos-9.0.2/packages/aztecoo/example/AztecOO.  The program source code says it requires a matrix file for Trilinos_Util_create_vbr (I assume this is HB file)
and a partition file for Trilinos_Util_distrib_vbr_matrix.

I am not sure what is the definition of partition files, and I'd like to know how to write partition files and the location of documents for that.

Thanks,
================================
 Keita Teranishi
 Scientific Library Group
 Cray, Inc.
 keita at cray.com
================================


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