16.10 - MEMBLK - Teradata Database

Teradata Database Support Utilities

prodname
Teradata Database
vrm_release
16.10
created_date
June 2017
category
Configuration
featnum
B035-1180-161K

Purpose

The MEMBLK command accesses the file system segment at the specified memory address, determines the segment type, and returns a formatted display of the segment.

The MEMBLK command is available only when Filer is invoked from the System Debugger or Coroner. For information on invoking Filer from the System Debugger or Coroner see Running Filer from the System Debugger and Coroner.

Syntax

The online help lists the display options (/P, /S, /M, /L, /H, /X) as /dispopt. You can type the options at the beginning or end of the command.


/P
Positions to the segment. Nothing is displayed unless there is a problem.
/S 
/M 
/L 
/H 
/X 

The display options: Short, Medium, Long, Hex, and Extended. The display format depends on the segment type. For descriptions of how the display options are applied to the different segment types, see the associated commands:CI, DB, WCI, and WDB.
/C
For compressed data blocks, displays the uncompressed DB header information, including extended header information pertaining to data compression.
If the scoped DB is not compressed, the output is similar to the display when the /S option is used.
/Z
For compressed data blocks, displays:
  • the uncompressed DB header information, including extended header information pertaining to data compression.
  • a hex format display of the compressed data stored in the DB. If the /Z option is not used, the hex display shows the uncompressed data.
If the scoped DB is not compressed, the output is similar to the output when the /x option is used.
memaddr
The memory address specifying the start of the segment.
=
Specifies that Filer should use the most recently saved value for memadd r.
This option cannot be used unless an input value has already been defined for memaddr . For more information, see Stored Input Values.

Usage Notes

The MEMBLK command is similar to the BLK command. See BLK.

MEMBLK might access obsolete copies of segments, so the displays might not be current. In addition, sometimes segments are inaccessible from the System Debugger when run against a dump. Segments that are inaccessible within the debugger are also inaccessible within Filer.