Release Notes

Dell PowerEdge R730xd Performance and Sizing Guide for Red Hat Ceph Storage - A Dell Red Hat Technical White Paper 36
6 Conclusions
After testing different combinations of Red Hat and Ceph Storage on Dell PowerEdge R730xd servers to
provide a highly-scalable enterprise storage solution, the following conclusions were made:
 The 3x replication configurations provided high throughput for read operations because the
erasure-coded reads have to reassemble data objects from the erasure-coded chunks. However,
the erasure-coded configurations demonstrated high throughput for write operations at a lesser
price, because of less write amplification.
 The PowerEdge R730xd 16+1 3x replication configuration yielded optimal price for read-write
throughput-oriented workloads. The PowerEdge R730xd 12+3 3x replication configuration was
superior for read-only workloads.
 The PowerEdge R730xd 16+1 erasure-coded configuration proved to be the choice for write-
heavy operations because increasing the storage device does not significantly affect the total $/GB
value.
 Replication mode yielded better performance for read operations and the erasure-coded mode
proved better for write operations.
 When used with Ceph Storage, Dell-Red Hat recommends the usage of single-drive RAID0 mode
on PowerEdge R730xd with PERC H730.
Overall, the PowerEdge R730xd 16+1 in 3x replication mode is recommended by Dell and Red Hat as the
configuration that provides optimal price/performance.