Administrator Guide

Appendix A Storage array cabling
19 Dell EMC Ready Solutions for HPC BeeGFS High Capacity Storage | ID 424
MDtest files and directory distribution across threads:
# of threads
# of files per directory
# of directories per thread
Total number of files
1
1024
2048
2,097,152
2
1024
1024
2,097,152
4
1024
512
2,097,152
8
1024
256
2,097,152
16
1024
128
2,097,152
32
1024
64
2,097,152
64
1024
32
2,097,152
128
1024
16
2,097,152
256
1024
8
2,097,152
512
1024
4
2,097,152
Figure 10 shows file metadata statistics for empty files:
Metadata performance
First, notice that the scale chosen was logarithmic with base 10 to allow comparing operations that have
differences several orders of magnitude. Otherwise some of the operations would look like a flat line close to
0 on a linear scale.
The system gets very good results with file stat operations reaching their peak value at 512 threads with
1.58M OP/s. The peak file create was approximately 292K OP/s and file removal at 503K OP/s.