4
Copyright © Oracle Corporation, 2002. All rights reserved.
Scalability and Cache Fusion
4-2
Copyright © Oracle Corporation, 2002. All rights reserved.
Objectives
After completing this lesson, you should be able to do
the following:
•
Define speedup and scaleup
•
Implement load balancing across instances
•
Compare Cache Fusion with pre-Oracle9i block
transfer behavior
4-3
Copyright © Oracle Corporation, 2002. All rights reserved.
Levels of Scalability
•
Hardware
•
Operating system
•
Database
•
Application
4-4
Copyright © Oracle Corporation, 2002. All rights reserved.
Scaleup and Speedup
Original system
Hard-
ware
100% of task
Time
Cluster system scaleup
up to
200%
of
task
up to
300%
of
task
Hard-
ware
Time
Hard-
ware
Time
Hard-
ware
Time
50% of task
Cluster system speedup
Hard-
ware
Time
Hard-
ware
Time
50% of task
4-5
Copyright © Oracle Corporation, 2002. All rights reserved.
Speedup and Scaleup for Different Types
of Workloads
Workload
OLTP and Internet
DSS with parallel query
Batch (mixed)
Speedup
No
Yes
Possible
Scaleup
Yes
Yes
Yes
评论0