2011

of performance tests either individually or simultaneously and covers the
following subsystems:
■ Disk I/O
■ File System
■ Content Server I/O
■ Memory Transfers
Each test subsystem can be configured with various parameters. Any number
of subsystems can be tested simultaneously but each subsystem will only have
one configuration during the execution of the performance tool. The profiling
tool will not run simultaneously with Composite or any Composite process
including itself.
Disk IO
The disk IO tests are invoked by the -disk switch. These tests consist of reading
and writing bytes through single threaded calls.
The behavior of disk IO tests are controlled by the following suboptions:
■ size
■ read block
■ write block
■ file
■ iterations
size=<n> where <n> is the number of bytes the operation read/write. This
suboption measures the speed at which bytes can be read/written depending
of the size of the file. This measures the effect of file fragmentation depending
on file size.
rblock=<b> where <b> is the size of each read. This suboption indicates that
the file created will be read in chunk of <l> bytes.
rblock=<b> where <b> is the size of each write. This suboption indicates that
the file created will be read in chunk of <l> bytes.
file=<filepath> where <filepath> indicates where the file will be created.
Disk IO | 863