Diskbuffsize

The diskbuffsize option specifies the maximum disk I/O buffer size (in kilobytes) that the client can use when reading files. The diskbuffsize option replaces the largecommbuffers option.

Windows operating systemsOptimal backup, archive migration client performance can usually be achieved if the value for this option is equal to or smaller than the amount of file read ahead provided by the client file system. A larger buffer requires more memory and it might not improve performance.

AIX operating systemsHP-UX operating systemsLinux operating systemsOracle Solaris operating systemsMac OS X operating systemsOptimal backup, archive, or HSM migration client performance can usually be achieved if the value for this option is equal to or smaller than the amount of file read ahead provided by the client file system. A larger buffer requires more memory and it might not improve performance.

Important: Use the default setting, unless otherwise directed by IBM® support personnel.
AIX operating systemsHP-UX operating systemsLinux operating systemsMac OS X operating systemsOracle Solaris operating systemsWindows operating systems

Supported Clients

This option is valid for all clients.

Options File

Windows operating systemsPlace this option in the client options file (dsm.opt).

AIX operating systemsHP-UX operating systemsLinux operating systemsOracle Solaris operating systemsMac OS X operating systemsPlace this option in the dsm.sys file within a server stanza.

Syntax

Read syntax diagramSkip visual syntax diagram
>>-DISKBuffsize-- --size---------------------------------------><

Parameters

Windows operating systemssize
Windows operating systemsSpecifies the maximum disk I/O buffer size (in kilobytes) that the client uses when reading files. The range of values is 16 through 1023; the default is 32.
AIX operating systemsHP-UX operating systemsLinux operating systemsMac OS X operating systemsOracle Solaris operating systemssize
AIX operating systemsHP-UX operating systemsLinux operating systemsMac OS X operating systemsOracle Solaris operating systemsSpecifies the maximum disk I/O buffer size (in kilobytes) that the client uses when reading files. The range of values is 16 through 1023; the default is 32. For AIX®: If enablelanfree no is set, the default setting for diskbuffsize is 256.

Examples

Options file:
diskbuffsize 64
Command line:
Does not apply.