Large Scale Problem using PARDISO.

Mistry__Mital — Mon, 01 Aug 2011 14:13:20 GMT

= where both X and B are matrices. I am solving for X. Size of

is 1,500,000 x 1,500,000. Aproximate non zeros are 60,000,000. I am able to run my code for the lower size problem. But for this size it does not run.

System configuration:

SGI - 8 processor with 32 GB memory.
Compiler - GNU.

I am using 10.0.1.014 intel mkl

When I am using iparm(60) = 2 it kill the process with -9 error

***************************FOLLOWING WAS ERROR******************************

The file ./pardiso_ooc.cfg was not opened
*** error PARDISO ( not enough mem. for OOC) error_num= -9

================ PARDISO: solving a symmetric indef. system ================

Summary PARDISO: ( reorder to reorder )
================

Times:
======

Time fulladj: 1.360909 s
Time reorder: 29.476320 s
Time symbfct: 34.058441 s
Time malloc : 0.000549 s
Time total : 64.896383 s total - sum: 0.000164 s

Statistics:
===========
< Parallel Direct Factorization with #processors: > 1
< Numerical Factorization with Level-3 BLAS performance >

< Linear system Ax = b>
#equations: 1460346
#non-zeros in A: 58022798
non-zeros in A (%): 0.002721
#right-hand sides: 1

< Factors L and U >
#columns for each panel: 10
#independent subgraphs: 0
< Preprocessing with state of the art partitioning metis>
#supernodes: 231589
size of largest supernode: 20746
number of nonzeros in L -905604445
number of nonzeros in U 1
number of nonzeros in L+U -905604444
test
check point 1
check point 2
check point 3
check point 5
check point 7
58022799
Reordering completed ...
The following ERROR was detected: -9

*****************************************************************************
Questions:

1) Is it possible to solve using current resources (8-Processors with each of 4GB RAM)?
2) If I want to run this size problem then what is the maximum RAM on single processor will I need? As we are planning to buy a system that has sufficient memory for this type of operations.

Thank you,

Mital Mistry.

Large Scale Problem using PARDISO.

Ron_Green — Mon, 01 Aug 2011 15:03:23 GMT

Mital,

I will transfer this issue the MKL User Forum.

ron

Large Scale Problem using PARDISO.

Mistry__Mital — Mon, 01 Aug 2011 15:04:18 GMT

Thank you Ron,

I tried by doing,

export MKL_PARDISO_OOC_MAX_CORE_SIZE=8000

And the process did not stop but it kept running for almost 2 days and did nothing.

Also, the process is not possible by in-core right?

Thanks,

Mital

topic Large Scale Problem using PARDISO. in Intel® oneAPI Math Kernel Library

Large Scale Problem using PARDISO.

Large Scale Problem using PARDISO.

Large Scale Problem using PARDISO.