What is checkpoint in Db2?
At a checkpoint, Db2 logs its current status and registers the log RBA of the checkpoint in the bootstrap data set (BSDS). At restart, Db2 uses the information in the checkpoint records to reconstruct its state when it terminated. Many log records can be written for a single checkpoint.
Is tablespace a Db2 object?
In Db2 for z/OS®, you use database objects, such as tables, table spaces, indexes, index spaces, keys, views, and databases to organize and access your data.
What is checkpoint frequency in Db2?
At least one checkpoint is taken each time that Db2 switches to a new active log data set. The recommendation is to provide enough active log space for at least 10 checkpoint intervals.
What is Z OS in Db2?
z/OS is the main operating system for IBM’s most robust hardware platform, IBM Z. Db2 for z/OS is the enterprise data server for IBM Z. It manages core business data across an enterprise and supports key business applications. Db2 for z/OS supports thousands of customers and millions of users.
What is Luw in DB2?
An earlier version of the code that would become DB2 LUW (Linux, Unix, Windows) was part of an Extended Edition component of OS/2 called Database Manager.
Which utility is used to restore the tablespace?
You can use the DSN1COPY utility to restore a partition or an entire table space for a partition-by-growth table space.
What is a DB2 table space?
A DB2® table space is a set of volumes on disks that hold the data sets in which tables are actually stored. All tables are kept in table spaces. A table space can have one or more tables. A table space can consist of a number of VSAM data sets.
Can the allocated space be greater than the space requested by DB2?
The allocated space can be greater than the amount of space requested by Db2. For example, it could be the smallest number of tracks that will accommodate the request. The amount of storage space requested must be available on some volume in the storage group based on VSAM space allocation restrictions.
What type of lock does DB2 use?
Specifies that Db2 can use any lock size. FL 507 In most cases, Db2 uses LOCKSIZE PAGE LOCKMAX SYSTEM.
What does the create tablespace statement define?
The CREATE TABLESPACE statement defines a table space at the current server. The type of table space depends on the keywords specified. This statement can be embedded in an application program or issued interactively.