BLKSIZE (FTP client and server) statement

Use the BLKSIZE statement to specify the block size of newly allocated data sets.

Server
This setting applies when creating files on the server's system (for example, with a PUT subcommand).
Client
This setting applies when creating files on the client's system (for example, with a GET subcommand).

Syntax

Read syntax diagramSkip visual syntax diagramBLKSIZE 6233BLKSIZEsize

Parameters

size
Specifies the block size of newly allocated data sets. The valid range is 0 - 32 760. Specifying no value, or a value of 0 for block size, allows the block size from a model DCB data set or SMS dataclass to be used. The default block size is 6 233.

Examples

Set block size to 6 144 bytes: 
BLKSIZE 6144
Allow the block size from a model DCB data set or SMS dataclass to be used: 
BLKSIZE

Usage notes

  • If you specify the BLKSIZE statement without a size, FTP does not specify the block size when allocating new data sets.
  • The block size attribute can be obtained from an SMS data class using the DATACLASS configuration statement, from a model data set using the DCBDSN configuration statement, or from the BLKSIZE statement.
  • Use BLKSIZE without a size if you have:
    • Specified a DATACLASS statement and want to use the blocksize from the data class, or
    • Specified a DCBDSN statement and want to use the blocksize from the model data set.
  • If you specify a DATACLASS, a DCBDSN, and BLKSIZE without size, the value from the model data set is used.
  • To override the blocksize attribute from the DATACLASS or DCBDSN settings:
    • Specify BLKSIZE with a value other than 0, or
    • Do not specify the BLKSIZE statement, and use the default.

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