DPACK Basics: Disk Throughput
Disk throughput is used to measure the utilized (actual) bandwidth between the host and its storage devices. Throughput is the measurement of bandwidth consumption of a storage device or subsystem from its host(s)
In DPACK this means an aggregated quantity of read in write data transfers reported in x Bytes/per second.
DPACK measures throughput in terms of the total bandwidth consumed for reads and writes at a host level. There are other factors to consider in when measuring throughput; however DPACK distills this measurement leaving little guesswork to understanding what the Host OS needs to fulfill frontend bandwidth requirements. For storage design, it is important to consider how disk devices, arrays, and SANs can handle the throughput needs of the host so that latency is kept to a minimum.
General rules of thumb
Avg. Throughput = IOPS * Block size
Block (IO) Size
Sequential v. Random I/O