A Real-Time Detection Method of Software Configuration Errors Based on Fine-Grained Configuration Item Types

Algorithm 1

anomaly error detection of the configuration update operation

Input: the modified configuration file path
Output: the backup data
(1)	execute such the command as “diff config_file snapshot_file > patch_file” and get all the modified configuration items since the last snapshot
(2)	Filter the modified operation based on the record in the configuration item update table
(3)	get the currently modifying configuration item
(4)	judge whether the current item parameter values meet all the related constraint rules in the rule base
(5)	If OK then
(6)	compare the current modification times and the threshold of modification times
(7)	If the current times are less than the threshold then
(8)	write the current modifying configuration item into the configuration item
update table and change it into the modified item
(9)	else
(10)	create a new snapshot of the configuration file
(11)	end
(12)	else
(13)	call the fast error recovery module to perform the recovery operation
(14)	end