IBM E16RMLL-I - Tivoli Storage Manager, Implementation Manual

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IBM Tivoli Storage Manager Implementation Guide
TCPBUFFSIZE
The TCPBUFFSIZE option specifies the size of the internal TCP communication
buffer that is used to transfer data between the client node and the server. A
large buffer can improve communication performance, but requires more
memory.
The default setting of TCPBUFFSIZE to 32 on client and server is the
recommended value.
TCPNODELAY
The TCPNODELAY option, when set to Yes, allows data packets less than the
MTU size to be sent out immediately. We recommend staying with the default
setting of YES.
15.3.4 General parameters
These parameters can affect system performance and can be manually tuned
according to client requirements.
EXPINTERVAL
The Tivoli Storage Manager server runs automatic inventory expiration to
remove unneeded client backup and archive file copies from the server. The
EXPINTERVAL option specifies the interval in hours between automatic expiries.
Backup and archive copy groups specify the criteria that make copies of files
eligible for deletion from data storage. However, even when a file becomes
eligible for deletion, the file is only marked for deletion in the server database. It
is not physically deleted from the database and storage pools until expiration
processing occurs. If expiration processing does not occur periodically, storage
pool space is not reclaimed from expired client files, and the Tivoli Storage
Manager server requires increased disk storage space.
Expiration processing is very CPU intensive. If possible, it should be run when
other Tivoli Storage Manager processes are not occurring. To enable this, either
schedule expiration once per day, or use the
setopt expinterval 0
command and
manually start the process with the
expire inventory
command at the server.
Note: The following parameters must be set in the server options file and
require a restart of the Tivoli Storage Manager server to take effect.