| At present,the customers of mainframes are mainly from enterprises such as banking,finance and insurance,which have very high requirements for the consistency and stability of mainframe systems.The system parameter library contains a large number of operating configuration parameters of the host system,which is very important for the manual and automated operation and maintenance of the system.However,due to the flexible syntax format of the parameter library,many types,and easy to change with the version,the manual and automatic modification of the parameter library requires higher technical requirements.Therefore,in this scenario,the accurate analysis of the system parameter library becomes a task that needs to be solved urgently.This article describes the design and implementation of the mainframe system parameter library parser.This paper proposes three solutions,the first is based on the text search parsing scheme,does not recognize the syntax structure of each parameter library type,and uses the simplest and intuitive text search to determine the object value of the filter search;the second is based on the top-down recursive descending syntax parsing scheme,which will be based on the syntax format node model to divide the syntax description and the actual content by field,and finally get the syntax tree and the content tree,and then traverse the filtering search object value on top of this The third is a top-down syntax parsing scheme based on predictive analytics and backtracking,because the syntax model is further standardized,and predictive analysis and backtracking are added to match the common subprefice syntax,considering that the former scheme cannot handle more complex syntax structures and common subverfier syntax.Finally,a series of tests and comparisons of the ability and cost of the solution are carried out,which proves that the third solution is the optimal solution at present.Prior to this article,there was no unified parsing method for the mainframe system parameter library,which was determined by the respective users,so there were differences in syntax between them.After a series of tests and comparisons,this paper proves that the third scheme proposed in this paper can achieve accurate parsing of the parameter library,which meets the expected requirements,and is the first time to implement the syntactic parsing of the mainframe system parameter library. |
