Release Notes

Dell PowerEdge R730xd Performance and Sizing Guide for Red Hat Ceph Storage - A Dell Red Hat Technical White Paper 30
4.1 Comparing Server Throughput in Different Configurations
This test compares the read and write throughputs of all configurations tested.
 Reads: The Ceph-replicated configurations generally yield higher read-throughput compared to
erasure-coded configurations. This is because the erasure-coded reads must reassemble data
objects from erasure-coded chunks.
 Writes: The Ceph erasure-coded configurations generally yield higher write-throughput compared
to replicated configurations, because there is lower write amplification with erasure-coded writes
(less MB written).
Summary: The R730xd 16+1, 3xRep configuration provided the best performance for throughput-
oriented read/write workloads. However, for write-oriented workloads, the R730xd 16+1, EC3+2
configuration provides superior write performance at significantly lesser costs.
Throughput/server comparison by using different configurations
0 200 400 600 800 1000 1200 1400
R730xd16r+1,3xRep
R730xd16j+1,3xRep
R730XD16+1,EC3+2
R730xd16+0,EC3+2
R730xd12+3,3xRep
MBpsperServer(4MBseqIO)
PerformanceComparison
ThroughputperServer
Writes
Reads