June 2018
Intermediate to advanced
478 pages
10h 52m
English
Content preview from IBM Db2 11.1 Certification Guide
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Smart disk storage management
Not all tables (entities) have the same level of importance when it comes to product performance. Some tables are critical, while others are less important to the overall transactional throughput. Likewise, disk storage solutions deliver varying levels of velocity and volume. You can save money and deliver better levels of performance by placing data where it is needed most.
The way to do this is to define storage groups for each I/O class of service (COS). The following table shows an example:
|
Class of service |
Service level |
Storage group |
Storage paths |
|
Critical |
.003 to .035 ms |
sg_critical |
/db/ts01, /db/ts02 |
|
Normal |
1 to 35 ms |
sg_normal |
/db/ts30, /db/ts31 |
|
Low |
No service level ... |
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