Specifications

Page B-5Read-Ahead and Write Buffering
This would set up 100KB of write buffering for the DSK devices and 100KB of write
buffering for the SUB device. All three drives would have their write buffers flushed
every minute (or sooner if the drives are not busy with read requests).
B.4FINAL NOTES
Both read-ahead and write buffering schemes used on the Roadrunner hardware
dramatically improve system performance in our lab tests. Both schemes are fine tuned
for both the 68030 processor and RISC SCSI controller and do not take cycles away
from AMOS like other commercially available disk optimization software.
Although our lab tests attempt to simulate the "real world" of user applications, they
probably use the resources of the Roadrunner CPU and SCSI sub-system completely
differently than your application does, therefore we highly recommend you experiment
with both cache and write buffer sizes, read-ahead blocks and flush periods on an
installed system to find the best possible combination for that system.
B.4.1Sample AMOS32.INI File
On the next two pages, a sample system initialization command file is shown with the
key Roadrunner related statements highlighted in bold type. At the bottom of each of the
example pages, there is additional information for each of the bolded entries.
Remember, the following initialization file is included for example purposes
only!
Your initialization file will reflect your actual system configuration and may be
quite different.
PDI-00172-60, Rev. A02