User manual

Configuration file server.cfg
iXOS-JUKEMAN 2.2 User Manual Pre.12/97 243
start-up behavior of the devices. Both p18 and device3 will be attached
automatically when the server is started. mercury has to be attached
manually.
7.2.3 Caches and buffers
Caches and buffers may be configured in the following sections. All file
sizes are in MBytes. See “Set up caches and buffers” on page 36 for a
detailed description.
IFS (incremental file system)
This is a buffer that temporarily holds data copied to wirtable disks with
operating system commands. To actually burn the buffered data to the
disk a “cdadm writer flush” command must be issued. The incre-
mental file system is described in “Burning disks incrementally” on page
151.
Example:
fsbuffer {
file { fsbuffer }
size { 100 }
inodes { 10000 }
}
The example defines a buffer of 40 MB. The file name of the buffer is
fsbuffer. The maximum number of inodes (i. e., the number of files and
directories that can be stored in the buffer) is 10,000.
IFS with several independent buffers
iXOS-JUKEMAN 2.2, in addition to setting up an IFS with one buffer, al-
lows setting up several independent buffers. You select one of these buff-
ers when you initialize a disk.
The section for these buffers is ifs { … }. The parameter list { }
specifies the names of all buffers (buffer names may be up to 15 charac-
ters). In the buffers section, the properties for each buffer are defined.
The following parameters may be specified:
Parameter Value
file
Contains the name of the buffer file or partition. Under UNIX a partition
may be specified as a buffer (raw{1}). For a partition, specify the
block device not the character device.