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Comment: typo and added Rotating log file size is multiple of 64K and bugs in links solved

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General settings that control execution of CHARON-VAX belong to an object callled called "session". It is a preloaded object; therefore, only "set" commands apply. 

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The following tables describe all available "session" parameters, their meaning and examples of usage:

hw_model

Parameterhw_model
TypeText string
Value

Virtual VAX system hardware model to be emulated.

Use a default configuration template for each particular model as a starting point for a custom configuration. This would ensure that the parameter is set correctly.

Example:

set session hw_model="VAX_6610"

The models are:

  • MicroVAX_3100_Model_96

  • MicroVAX_3100_Model_98

  • MicroVAX_3600

  • MicroVAX_3900

  • MicroVAX_II

  • VAXserver_3600

  • VAXserver_3600

  • VAXserver_3600_128

  • VAXserver_3600_512

  • VAXserver_3900

  • VAXserver_3900_128

  • VAXserver_3900_512

  • VAX_4000_Model_106

  • VAX_4000_Model_108

  • VAX_4000_Model_700

  • VAX_4000_Model_705

  • VAX_6000_Model_310

  • VAXstation_4000_Model_90

  • VAX_6610

  • VAX_6620

  • VAX_6630

  • VAX_6640

  • VAX_6650

  • VAX_6660

configuration_name


Parameterconfiguration_name
TypeText string
Value

Name of CHARON-VAX instance (unique):

set session configuration_name="MSCDV1"

The value of this parameter is used as prefix to the event log file name when multiple log files are configured (see below).

From the example above, the CHARON-VAX log file will have the following name:

MSCDV1-YYYY-MM-DD-hh-mm-ss-xxxxxxxxx.log

xxxxxxxxx is an increasing decimal number starting from 000000000 to separate log files with the same time of creation (in case the log is being written faster than one log file per second).

log

Parameterlog
TypeText string
Value

The log file or directory name is where the log file for each CHARON-VAX execution session is stored.

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titleLog specified as a file name

It is possible to overwrite the existing log file or to extend it using the "log_method" parameter.

(info) The "log_method" parameter is effective only when a single log file is specified, not a directory.

Example:

set session log="/charon/vax4106prod.log"



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titleLog specified as a directory

CHARON-VAX automatically creates individual log files for each CHARON-VAX execution session. If the log parameter is omitted, CHARON-VAX creates a log file for each CHARON-VAX execution session in the directory where the emulator was started. In these two cases, the log rotation mode is enabled, meaning a new log file is created each time the virtual machine is started and when the log file size exceeds the one specified (see log_file_size) and/or when the log file is older than a specified number of days (see log_rotation_period).

(info) A symbolic link located in the same directory will be created, pointing to the active log file. Its name is based on the hw_model parameter or the configuration_name parameter if specified.

If the "configuration_name" parameter of the session is specified, the log file name is composed as follows:

<configuration_name>-YYYY-MM-DD-hh-mm-ss-xxxxxxxxx.log

If the "configuration_name" parameter is omitted, the log file name will have the following format:

<hw_model>-YYYY-MM-DD-hh-mm-ss-xxxxxxxxx.log

where "xxxxxxxxx" is an increasing decimal integer, starting from 000000000 to separate log files with the same time of creation (in case the log is being created faster than one log file per second).

(warning) Only existing directory can be specified. If the directory specified does not exist, this will be considered as a flat file.

Example:

set session configuration_name="vax4106prod"

set session log="/charon/logs"

The execution of the virtual machine will create a log file, named /charon/logs/vax4106prod-2016-10-13-10-00-00-000000000.log (for example) and a symbolic link named /charon/logs/vax4106prod.log pointing to this file. The link will be updated when the log rotation will occur.


log_method

Parameterlog_method
TypeText string
Value
  • "overwrite" (default)
  • "append"

Determines if previous log information is maintained.

Info
This parameter must be specified only in addition to “log” parameter on the same line.

This parameter is applicable only if the CHARON-VAX log is stored in a file that is specified explicitly with the "log" parameter.

Example:

set session log="log.txt" log_method="append"



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log_file_size

Parameterlog_file_size
TypeText string
ValueIf log rotation is enabled, the log_file_size parameter determines the log file size threshold at which the log is automatically rotated. Rotating log file size is multiple of 64K
  • "unlimited" or "0" (default) - the feature is disabled
  • "default" - default size is used (4Mb)
  • <size>[KMG] - size of the current log file in bytes with additional multipliers:
    • K - Kilobyte - multiply by 1024
    • M - Megabyte - multiply by 1024*1024
    • G - Gigabyte - multiply by 1024*1024*1024

Examples:

set session log_file_size="default"


set session log_file_size=10M

(warning)(info) Minimum LOG File size is 64K, maximum is 1G. Setting size less then than 64K effectively makes the LOG File unlimited.

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Parameterlog_rotation_period
TypeText string
Value
  • "default" - default value, 7 days. This values is used even if the "log_rotation_period" is not specified.
  • "daily" or "1"
  • "weekly" or "7"
  • "never" or "0"
  • <N> - in N days where N is greater than 0

If the rotation log mode is enabled this parameter controls switching to next log file based on period of time passed. If enabled the switching to next log file appears at midnight.

Examples:

set session log_rotation_period="weekly"


set session log_rotation_period=14

(info) If enabled the switching to next log file appears at midnight

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Parameter

license_key_id

TypeText string
Value

A set of Sentinel Key IDs that specifies the license keys to be used by CHARON. It is also possibly to use a keyword "any" to force CHARON to look for suilable suitable license in all available keys if the license is not found in the specified keys.

Example:

set session license_key_id = "1877752571,354850588,any"

Based on the presence of this parameter in the configuration file, CHARON behaves as follows:
 

  1. No keys are specified (the parameter is absent)
    CHARON performs an unqualified search for any suitable key in unspecified order. If no key is found, CHARON exits.

  2. One or many keys are specified
    CHARON performs a qualified search for a regular license key in the specified order. If it is not found, CHARON exits (if the keyword "any" is not set).

If the keyword "any" is specified then if no valid license has been found in the keys with specified ID’s all other available keys are examined for valid license as well.

Note

The order in which keys are specified is very important. If a valid license was found in the key which ID was not the first one specified in configuration file, then available keys are periodically rescanned and if the key with the ID earlier in the list than the current one is found CHARON tries to find a valid license there and in case of success switches to that key.


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