Administrator Guide

Performance characterization
28 Dell EMC Ready Solution for HPC PixStor Storage | Document ID
more storage nodes modules are added, and a similar performance increase can be expected from the
optional high demand metadata module.
Table 5 Peak & Sustained Performance
Benchmark
Peak Performance
Sustained Performance
Write
Read
Write
Read
Large Sequential N clients to N files
16.7 GB/s
23 GB/s
16.5 GB/s
20.5 GB/s
Large Sequential N clients to single shared file
16.5 GB/s
23.8 GB/s
16.2 GB/s
20.5 GB/s
Random Small blocks N clients to N files
15.8KIOps
20.4KIOps
15.7KIOps
20.4KIOps
Metadata Create empty files
169.4K IOps
127.2K IOps
Metadata Stat empty files
11.2M IOps
3.3M IOps
Metadata Read empty files
4.8M IOps
2.4M IOps
Metadata Remove empty files
194.2K IOps
144.8K IOps
Metadata Create 4KiB files
55.4K IOps
55.4K IOps
Metadata Stat 4KiB files
6.4M IOps
4M IOps
Metadata Read 4KiB files
37.3K IOps
37.3K IOps
Metadata Remove 4KiB files
1M IOps
219.5K IOps
PixStor Solution with Capacity Expansion and High Demand Meta-Data
This benchmarking was on the initial configuration plus four ME484s, that is two R740 servers connected to
four ME4084s and four ME484s (one behind each ME4084), with the optional HDMD module (two R740) but
using a single ME4024 array instead of the two arrays a large configuration would normally have.
The software versions use during the characterization are listed in Table 6.
Table 6 Software Components versions during characterization
Solution Component
Version at Characterization
Operating System
CentOS 7.7
Kernel version
3.10.0-1062.9.1.el7.x86_64
PixStor Software
5.1.1.4
Spectrum Scale (GPFS)
5.0.4-2
OFED Version
Mellanox OFED-4.7-3.2.9
Sequential IOzone Performance N clients to N files
Sequential N clients to N files performance was measured with IOzone version 3.487. Tests executed varied
from single thread up to 1024 threads, and the results of the capacity expanded solution (4x ME4084s + 4x
ME484s) are contrasted to the large size solution (4x ME4084s).