havenzuloo.blogg.se - Logical volume manager

#LOGICAL VOLUME MANAGER HOW TO#
#LOGICAL VOLUME MANAGER ARCHIVE#

Place databases, tables, logical-log files, and the physical log in dbspaces. The database server uses the dbspace to store databases and tables.

Dbspaces A dbspace is a logical unit that can contain between 1 and 32,766 chunks.

Extents An extent consists of a collection of contiguous pages that store data for a given table.

An sbpage is the same size as the database server page, which is usually 2 KB on UNIX™ and 4 KB on Windows™. Unlike blobpages, sbpages are not configurable.

Sbpages An sbpage is the type of page that the database server uses to store smart large objects within an sbspace.

Blobpages A blobpage is the unit of disk-space allocation that the database server uses to store simple large objects (TEXT or BYTE data) within a blobspace.

Pages A page is the physical unit of disk storage that the database server uses to read from and write to HCL® Informix® databases.

Chunks A chunk is the largest unit of physical disk dedicated to database server data storage.

Unlike the logical units of storage whose size fluctuates, each of the physical units has a fixed or assigned size that is determined by the disk architecture.

Data storage The database server uses physical units of storage to allocate disk space.

Shared memory These topics describe the content of database server shared memory, the factors that determine the sizes of shared-memory areas, and how data moves into and out of shared memory.

#LOGICAL VOLUME MANAGER HOW TO#

Manage virtual processors These topics describe how to set the configuration parameters that affect database server virtual processors, and how to start and stop virtual processors.Virtual processors and threads These topics describe virtual processors, explain how threads run within the virtual processors, and explain how the database server uses virtual processors and threads to improve performance.Administrator's Guide These topics provide the information required to administer HCL Informix®.List of utilities HCL Informix® includes utilities and applications that you can use to perform administrative tasks and capture information about configuration and performance.System administration These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.

#LOGICAL VOLUME MANAGER ARCHIVE#

Administering In addition to administering the database server, you can tune performance, replicate data, and archive data.