JPS6059614B2 - Device management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a device management system, and particularly to a system for managing the status of a terminal device.

(2) Background of the Technology Generally, in an electronic switching system having a central control unit (or processing unit) CPU, for example, a large number of magnetic tape devices MTHMT are used.

...MTn is the magnetic tape controller MTC,
, M.T.C. ... ...When controlled by the CPU via MTCn, each device MT, MT2, .
...It is necessary for the storage device MEM to manage the current state of MTn. (3) Prior Art and Problems The conventional device management system is implemented by providing a table in the MEM in which each device is given a status number, as shown in FIG.

That is, the four terminal devices MTI, MT2, MT3, and MT4 are assigned numbers representing four states: 0: output state, 1: output standby state, 2: empty state, and 3: failure state, and all possible The entire device was managed by numbering it.
Therefore, in this management method, combinations ST, , S shown by broken lines
T. , ST. ...... are required, and when the number of states is 4 and the number of devices is 4, 4'■256 combinations must be considered, and in general, when the number of states is n and the number of devices is m, nm A combination of these is required. However, in this conventional management method, when the number of devices increases, the number of combinations increases exponentially, and the amount of programs required to index the table shown in Figure 2 becomes enormous, and the time required for indexing increases. There was a problem that there were so many people that it was impossible to manage them efficiently.

(4) Purpose of the Invention An object of the present invention is to improve the efficiency of a device management system by fixing a state in advance and managing terminal devices belonging to this state by address linkage.

(5) Structure of the Invention According to the present invention, a data block consisting of an area corresponding to a terminal device to be managed and a management table for each possible state of each terminal device are provided, and the corresponding areas of the data block are arranged in the same state. The linkage address of the next corresponding area in the management table is entered, and the address of the first area of the group of corresponding areas in the same state is entered in each state of the management table. A device management method is provided by determining the first terminal device by detecting the area address, and then determining all the terminal devices in the same state as the first terminal device by sequentially detecting the linkage address.

(6) Embodiments of the Invention The present invention will now be described by way of embodiments with reference to the accompanying drawings.

FIG. 3 is a configuration diagram of a management table and data blocks provided in the storage device MEM (FIG. 1) to implement the device management method according to the present invention.

In the system configuration diagram of FIG. 1, terminal devices MTl and M
A case will be described in which T2 is in an output state, MT3 and MT4 are in an empty state, and the CPU manages these four devices.

The contents of the storage device MEM in FIG. 3 are data block DB
and management table TAB. Data block DB is M
It is divided into four areas: tl, mt2, mt3, and Mt, and each area has addresses ×××1, ×××2 in the MEM.
, XXX3, and XXX4, which correspond to the terminal devices MTl, MT2, MT3, and MT4 (FIG. 1) to be actually managed. In addition, each corresponding area Mtl, mt2, mt3
and Mt4 are linkage address area A and data area D, respectively, and in linkage address area A, the address of the area corresponding to the terminal device of the other party is written for each currently managed device. The devices MTl and MT2 are connected to MT3
and N4T4 are managed in the same state, so the address area A of the area Mtl corresponding to the first of these devices in the same state, that is, MTl, contains the other device MT2.
Address XXX2 in N4EM of area Mt2 corresponding to
is entered. Regarding MT3 and MT4, for the same reason, Mt3's address area A has Mt4's ME.
Address XXXX4 in M is written. MT2 and M
Since T4 has no other terminal device to be linked to in terms of management other than ζ, END is written in the linkage address area A of its corresponding areas Mt2 and Mt. Data area D contains actual terminal devices MTl, MT2, MT3 and M.
It contains the same data as T4.

The management table is divided into four status areas 0, 1, 2 and 3, where 0 is output status, 1 is output standby status, 2 is empty status,
3 indicates a failure condition.

In these status areas, addresses of areas in the data block DB corresponding to the first device among a group of devices in the same status are written. Therefore, MTl and MT2 in the same output state
Address of Mtl in the corresponding area Mtl, mt2 XX
×1 is in TAB 0, and another set of M is in standby state
Among the corresponding areas Mt3 and mt4 of T3 and MT4, the address XXX3 of Mt3 is written in 2 of TAB, respectively.

) After configuring the storage device MEM in this way, if the central processing unit QPU wants to search for a terminal device in the output state,
First, the management table TAB is indexed, and it is detected that the address XXXX1 is written in the 0 area, and it is found that the corresponding area Mt is actually in the output state of the terminal/terminal device MTl. .

Furthermore, XX in linkage address area A of area Mtl
From ×2, it is found that the actual terminal device MT2 corresponding to Mt2 is also in the output state. In addition, END is written in the address area A of Mt2, so it can be seen that the only terminal devices in the output state are MTl and MT2, and the predetermined processing is performed. NO is entered, and there is no terminal device in standby state.The same is true for devices in failure state.Furthermore, regarding empty state 3, the actual terminal device M is in the same relationship as the output state.
T3 and MT4 are linked. In this way, the terminal device belonging to a certain state is known, but if the state changes, for example, if the MTl with output state 0 fails for some reason, the content of TAB 3 will be changed by the CPU to the Mtl corresponding to the MTl. The address is changed to ×××1 and other M
If T, also fails at the same time, the address area A of Mtl will be
END is written in the address area where XX4 is Mt. (7) Effects of the Invention According to the present invention, by fixing a state in advance and managing terminal devices belonging to this state by address linkage, it is possible to improve the efficiency of the device management method.

[Brief explanation of the drawing]

FIG. 1 is a general system configuration diagram, FIG. 2 is an explanatory diagram of a conventional device management method, and FIG. 3 is an explanatory diagram of a device management method according to the present invention.

Claims (1)

[Claims] 1 A data block consisting of an area corresponding to the terminal device to be managed and a management table for each possible state of each terminal device are provided, and data locks corresponding to each terminal are set according to the terminal device state. A device management method characterized in that each terminal device can be managed according to its status by linking addresses to a management table determined by the above.