64 Storage Management with DB2 for OS/390
Table19. SMS Storage Classes for Recovery Data Sets
7.1.3 SMS Management Class
DB2 administratorsmay require several Management Classes for DB2 recovery
data sets.T heseManagement Classes have different expiration and backup
requirements.Table 20 on page 65 shows five examples of Management Classes
for theDB2 recovery data sets. These are:
MCDBICD This Management Class is intended forimage copy data sets
created daily.These data sets will expire after fourdays.
MCDBICW ThisManagement Class is intended for image copy data sets
created weekly.These data sets will expire after 25 days.
MCDBICM ThisManagement Class is intended for image copy data sets
created monthly and primary copies of the archive logs.These
data sets willexpire after 365 days.
MCDBLV2 ThisManagement Class is intended for secondary archive logs
and secondary image copy data sets. Using thisM anagement
Class, thesedata sets will be migrated directly to level two.
MCDBACTL This Management Class is intended foractive logs and BSDS
data sets.T hesedata sets do not require SMS management.
Attribute SCDBIC SCDBICH SCDBARCH SCDBACTL
Direct response (MSEC) 10 5 10 5
Directbias
Sequentialresponse (MSEC) 10 5 10 1
Sequentialbias
Sustaineddata rate (MB/sec) 10 20 20 40
Availabilitya
a.Continuous=Duplexed or RAID Disk, Preferred=Array Disk, Standard=Array orSimplex Disk
Standard Continuous Continuous Continuous
Accessibilityb
b.If a device with Concurrent Copy capability is desired, specify Continuousor Continuous Preferred
Standard Standard Standard Standard
Guaranteed space No No No Yes
Guaranteed synchronous wr ite No No No No
Cacheset name
CFdirect weight
CFsequential weight