IOPS

IOPS is the short form of input/output per second. A storage device can perform a number of IOPS and is always a factor of a few parameters. They are the block size of the I/O (systems can do more IOPS with small block size transfers), Read versus write pattern (most systems do faster reads than writes) and Random versus sequential access patterns (most storage devices do much better with sequential data access compared to random data access RAM-based solid state disks perform well with random or sequential accesses). The most common performance characteristics that are measured or defined are Total IOPS, Random Read IOPS, Random Write IOPS, Sequential Read IOPS and Sequential Write IOPS. Some examples are 7200RPM SATA drives and Intel X-25 M. The specific unique number of IOPS possible in any server configuration will change and is mainly depending upon the variables the tester enters into the program, including the balance of read and write operations, the mix of random or sequential access patterns, the number of worker threads and queue depth, as well as the data block sizes.