IONCONFIG(5)						      ICI configuration files						      IONCONFIG(5)

NAME

       ionconfig - ION node configuration parameters file

DESCRIPTION

       ION node configuration parameters are passed to ionadmin in a file of parameter name/value pairs:

	   parameter_name parameter_value

       Any line of the file that begins with a '#' character is considered a comment and is ignored.

       ionadmin supplies default values for any parameters for which no value is provided in the node configuration parameters file.

       The applicable parameters are as follows:

       sdrName
	   This is the character string by which this ION node's SDR database will be identified.  (Note that the SDR database infrastructure
	   enables multiple databases to be constructed on a single host computer.)  The default value is "ion".

       configFlags
	   This is the bitwise "OR" of the flag values that characterize the SDR database to use for this ION node.  The default value is 1.  The
	   SDR configuration flags are documented in detail in sdr(3).	To recap:

	   1.  The SDR is implemented in a region of shared memory.  [Possibly with write-through to a file, for fault tolerance.]

	   2.  The SDR is implemented as a file.  [Possibly cached in a region of shared memory, for faster data retrieval.]

	   3.  Transactions in the SDR are written ahead to a log, making them reversible.

	   4.  SDR heap updates are not allowed to cross object boundaries.

       heapKey
	   This is the shared-memory key by which the pre-allocated block of shared dynamic memory to be used as heap space for this SDR can be
	   located, if applicable.  The default value is -1, i.e., not specified and not applicable.

       pathName
	   This is the fully qualified path name of the directory in which are located (a) the file to be used as heap space for this SDR (which
	   will be created, if it doesn't already exist), in the event that the SDR is to be implemented in a file, and (b) the file to be used to
	   log the database updates of each SDR transaction, in the event that transactions in this SDR are to be reversible.  The default value
	   is /usr/ion.

       heapWords
	   This is the number of words (of 32 bits each on a 32-bit machine, 64 bits each on a 64-bit machine) of nominally non-volatile storage
	   to use for ION's SDR database.  If the SDR is to be implemented in shared memory and no heapKey is specified, a block of shared memory
	   of this size will be allocated (e.g., by malloc()) at the time the node is created.	If the SDR is to be implemented in a file and no
	   file named ion.sdr exists in the directory identified by pathName, then a file of this name and size will be created in this directory
	   and initialized to all binary zeroes.  The default value is 250000 words (1 million bytes on a 32-bit computer).

       wmKey
	   This is the shared-memory key by which this ION node's working memory will be identified.  The default value is 65537.

       wmAddress
	   This is the address of the block of dynamic memory -- volatile storage, which is not expected to persist across a system reboot -- to
	   use for this ION node's working memory.  If zero, the working memory block will be allocated from system memory (e.g., by malloc()) at
	   the time the local ION node is created.  The default value is zero.

       wmSize
	   This is the size of the block of dynamic memory that will be used for this ION node's working memory.  If wmAddress is zero, a block of
	   system memory of this size will be allocated (e.g., by malloc()) at the time the node is created.  The default value is 5000000 (5
	   million bytes).

EXAMPLE

       configFlags 1

       heapWords 2500000

       heapKey -1

       pathName 'usr/ion'

       wmSize 5000000

       wmAddress 0

SEE ALSO

       ionadmin(1)

perl v5.14.2							    2012-06-11							      IONCONFIG(5)