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.
This option is valid for all clients.
Place this option in the client options file (dsm.opt).
Place this option in the dsm.sys file within a server stanza.