Resource Management

Storage Measurements

Individual disks are well instrumented, but storage subsystems are now much more complex than a few individual disks. This section explains the basic Solaris software measures and discusses more complex disk subsystems.

Disk Workloads

There are six basic disk access patterns. Read, write, and update operations can either be sequentially or randomly distributed. Sequential read and write occur when files are copied and created or when large amounts of data are processed. Random read and write can occur in indexed database reads or can be due to page-in or page-out to a file. Update consists of a read-modify-write sequence and can be caused by a database system committing a sequence of transactions in either a sequential or ...