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136 Sun StorageTek SAM Archive Configuration and Administration Guide • Version 4, Update 6, 04/07

You can also specify this directive by using the File System Manager software. For

more information, see the File System Manager online help.

Specifying a Log File

You can request that the Sun StorageTek SAM software collect file-staging event

information and write it to a log file. The logfile directive specifies a log file to

which the stager can write logging information. This directive has the following

format:

For filename, specify a full path name.

For event, specify one or more staging events. If you specify more than one event,

use spaces to separate each them. Possible event specifications are listed in

TABLE 5-3.

lock The lock argument indicates that the stager should use locked buffers when

staging archive copies. If lock is specified, the stager sets file locks on the

stage buffer in memory for the duration of the copy operation. This avoids the

overhead associated with locking and unlocking the buffer for each I/O

request and can thereby result in a reduction in system CPU time.

The lock argument should be specified only on large systems with large

amounts of memory. Insufficient memory can cause an out-of-memory

condition.

The lock argument is effective only if direct I/O is enabled for the file being

staged. By default, lock is not specified, and the file system sets the locks on

all direct I/O buffers, including those for staging. For more information on

enabling direct I/O, see the setfa(1) man page, the sam_setfa(3) library

routine man page, or the -O forcedirectio option on the

mount_samfs(1M) man page.

logfile=filename [ event ]

TABLE 5-3 Values for the event Argument

Value Action

all Logs all staging events.

start Logs when staging begins for a file.

TABLE 5-2 Arguments for the bufsize Directive (Continued)

Argument Meaning

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