Splitting Configuration Parameters and Behavior

This table describes the configuration parameters that affect splitting (tape_splitsize, split_diskbuffer, and fallback_splitsize), the relevant conditions for a particular dump, and the results. See the key, below, for more information

Configuration Parameter Table

condition	configuration			result
	tape splitsize	split diskbuffer	fallback splitsize	part size	caching
FILE_WRITE	-	?	?	∞	none
	0	?	?	∞	none
	999	?	?	tp	none
PORT_WRITE datapath Amanda	-	?	?	∞	none
	0	?	?	∞	none
	999	-	-	10M	memory
	999	-	0	tp	memory
	999	-	999	fb	memory
	999	inval	-	10M	memory
	999	inval	0	tp	memory
	999	inval	999	fb	memory
	999	/...	?	tp	disk
PORT_WRITE datapath DirectTCP	-	?	?	∞	none
	0	?	?	∞	none
	999	-	-	10M	none
	999	-	0	tp	none
	999	-	999	fb	none
	999	inval	-	10M	none
	999	inval	0	tp	none
	999	inval	999	fb	none
	999	/...	?	tp	none

Key

For parameters:

?

parameter is ignored

-

parameter is not given in amanda.conf

0

parameter has zero value

999

parameter has nonzero value

/...

a valid value for split_diskbuffer

inval

in invalid value for split_diskbuffer (nonexistent, or less than tape_splitsize bytes available)

For results:

tp

tape_splitsize KB parts

fb

fallback_splitsize KB parts

10M

default fallback_splitsize of 10M

∞

no splitting (DirectTCP devices will still successfully span from volume to volume; others will not)