User Guide

  • 2022.2
  • 08/08/2022
  • Public Content
Contents

FLUSH-PREFIX

Syntax

FLUSH-PREFIX <directory name>

Variable

VT_FLUSH_PREFIX

Default

Content of environment variables or
/tmp

Description

Specifies the directory of the flush file. It can be an absolute or relative pathname; in the latter case, it is interpreted relative to the current working directory of the process writing it.
On Unix* systems, the flush file of each process is created and immediately removed while the processes keep their file open. This has two effects:
  1. if processes get killed prematurely, flush files do not clutter the file system
  2. during flushing, the remaining space on the file systems gets less although the file which grows is not visible anymore
The file name is
VT-flush-
<program name>
_
<rank>
-
<pid>
.dat
, with
<rank>
being the rank of the process in
MPI_COMM_WORLD
and
<pid>
the Unix process id.
A good default directory is searched for among the candidates listed below in this order:
  1. first folder with more than 512MB
  2. failing that, folder with most available space
Candidates (in this order) are the directories referred to with these environment variables and hard-coded directory names:
  1. BIGTEMP
  2. FASTTEMP
  3. TMPDIR
  4. TMP
  5. TMPVAR
  6. /work
  7. /scratch
  8. /tmp

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.