Table 19. SMS Storage Classes for Recovery Data Sets

Attribute

SCDBIC

SCDBICH

SCDBARCH

SCDBACTL

 

 

 

 

 

Direct response (MSEC)

10

5

10

5

 

 

 

 

 

Direct bias

 

 

 

 

 

 

 

 

 

Sequential response (MSEC)

10

5

10

1

 

 

 

 

 

Sequential bias

 

 

 

 

 

 

 

 

 

Sustained data rate (MB/sec)

10

20

20

40

 

 

 

 

 

Availabilitya

Standard

Continuous

Continuous

Continuous

Accessibilityb

Standard

Standard

Standard

Standard

Guaranteed space

No

No

No

Yes

 

 

 

 

 

Guaranteed synchronous write

No

No

No

No

 

 

 

 

 

Cache set name

 

 

 

 

 

 

 

 

 

CF direct weight

 

 

 

 

 

 

 

 

 

CF sequential weight

 

 

 

 

 

 

 

 

 

a. Continuous=Duplexed or RAID Disk, Preferred=Array Disk, Standard=Array or Simplex Disk

b. If a device with Concurrent Copy capability is desired, specify Continuous or Continuous Preferred

7.1.3 SMS Management Class

DB2 administrators may require several Management Classes for DB2 recovery data sets. These Management Classes have different expiration and backup requirements. Table 20 on page 65 shows five examples of Management Classes for the DB2 recovery data sets. These are:

MCDBICD

This Management Class is intended for image copy data sets

 

created daily. These data sets will expire after four days.

MCDBICW

This Management Class is intended for image copy data sets

 

created weekly. These data sets will expire after 25 days.

MCDBICM

This Management Class is intended for image copy data sets

 

created monthly and primary copies of the archive logs. These

 

data sets will expire after 365 days.

MCDBLV2

This Management Class is intended for secondary archive logs

 

and secondary image copy data sets. Using this Management

 

Class, these data sets will be migrated directly to level two.

MCDBACTL

This Management Class is intended for active logs and BSDS

 

data sets. These data sets do not require SMS management.

64Storage Management with DB2 for OS/390

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IBM 5655-DB2, 5695-DF1 manual Mcdbicd, Mcdbicw, Mcdbicm, MCDBLV2, Mcdbactl

5695-DF1, 5655-DB2 specifications

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