15.00 - MEMBLK - Teradata Database

Teradata Database Support Utilities

prodname
Teradata Database
vrm_release
15.00
category
Configuration
featnum
B035-1180-015K

MEMBLK

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.

Note: 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” on page 63.

Syntax  

Note: 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.

 

Syntax Element

Description

/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” on page 112, “DB” on page 117, “WCI” on page 226, and “WDB” on page 229.

/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 memaddr.

    This option cannot be used unless an input value has already been defined for memaddr. For more information, see “Stored Input Values” on page 82.

    Usage Notes  

    The MEMBLK command is similar to the BLK command. See “BLK” on page 109.

    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.