Summary of common mistakes when selecting hardware

Use the examples provided within this documentation of IBM tested configurations for different workloads to avoid some of the most common hardware selection mistakes.

These mistakes include the following:

Repurposing underpowered legacy hardware for use with Ceph.
Using dissimilar hardware in the same pool.
Using 1 Gbps networks instead of 10Gbps or greater.
Neglecting to setup both public and cluster networks.
Using RAID instead of JBOD.
Selecting drives on a price basis without regard to performance or throughput.
Journaling on OSD data drives when the use case calls for an SSD journal.
Having a disk controller with insufficient throughput characteristics.