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DS8800 Performance Monitoring and Tuning
book

DS8800 Performance Monitoring and Tuning

by Gero Schmidt, Bertrand Dufrasne, Jana Jamsek, Peter Kimmel, Hiroaki Matsuno, Flavio Morais, Lindsay Oxenham, Antonio Rainero, Denis Senin
July 2012
Intermediate to advanced content levelIntermediate to advanced
726 pages
26h 28m
English
IBM Redbooks
Content preview from DS8800 Performance Monitoring and Tuning
400 DS8800 Performance Monitoring and Tuning
priority control. The prioritization code has some processing overhead and can be disabled
for disks that are targeted for similar I/O activities, such as databases.
I/O completion and cancellation
The Windows Server 2008 I/O subsystem provides a more efficient way to manage the
initiation and completion of I/O requests, resulting in a reduced number of context switches,
lower CPU utilization, and reduced overall I/O response time.
I/O request size
The maximum I/O size was increased from 64 KB per I/O request in Windows Server 2003 to
1024 KB in Windows Server 2008. For large sequential workloads, such as file shares or
backups, this increase can improve the disk throughput.
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Publisher Resources

ISBN: 0738436836Purchase book