Importance

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Abstract

To use logging areas with no empty spacing left and trace back the logs to the past, a logging system is provided. Information to be logged includes data and management information managing the data. The logging system comprises memory having a management area and a data area, and a writing element for writing not only management information into the management area with a fixed length but also data into at least one of the data area and the management area. The writing element comprises a member for writing the management information about the data to be written in the data area into the management area with the fixed length and a member for sequentially writing the data into the data area with variable lengths according to the management information. The writing element further comprises a member for determining whether or not the data are less than in size a fixed-length area of the management area, a member for writing the data into the management area when the data are less than in size the fixed-length area, and a member for writing not only the data into the data area but also an address for the data written into the management area, the address being adopted as the management information, when the data are not less than in size the fixed-length area.

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