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.
Optimal 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.
Optimal 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.
Supported Clients
This option is valid for all clients.
Options File
Place
this option in the client options file (dsm.opt).
Place this option in the client
system-options file (dsm.sys) within a server stanza.
Syntax
Parameters
- size
- Specifies 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.
- size
- Specifies 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.