Abstract: A log data query method includes determining a target node matching a query time range from a log query time tree, a node in the log query time tree being configured to record a time range for a log query; determining a target subtree from subtrees under the target node and configured to search for a boundary time value corresponding to the query time range; performing leaf node traversal from an edge leaf node of the target subtree, and stopping the leaf node traversal after a target leaf node is traversed, a time value, within a target time range recorded in the target leaf node, having corresponding log data in a disk; determining a time value recorded in the target leaf node having corresponding log data and in a critical state, for obtaining the boundary time value; and obtaining log data matching the query time range from the disk.

Abstract: The present invention belongs to the field of printing control technology, and is especially one kind of printing control method with reducing printing memory requirement. The available printing technology always needs complicated segment forming gratings in advance and occupying great amount of memory. The printing control method of the present invention includes interpreting the page data as banded intermediate format data, calculating the time for forming grating of each band of the intermediate format data, pre-analyzing the bands with time for forming grating greater than the printing time, and arranging the job of forming grating of the complicated bands in the idle print time as far as possible. The said method can reduce the band number of forming gratings in advance and reduce the printing memory requirement.

Abstract: The present invention belongs to the field of printing control technology, and is especially one kind of printing control method with reducing printing memory requirement. The available printing technology always needs complicated segment forming gratings in advance and occupying great amount of memory. The printing control method of the present invention includes interpreting the page data as banded intermediate format data, calculating the time for forming grating of each band of the intermediate format data, pre-analyzing the bands with time for forming grating greater than the printing time, and arranging the job of forming grating of the complicated bands in the idle print time as far as possible. The said method can reduce the band number of forming gratings in advance and reduce the printing memory requirement.