JPH0228748A - Device for controlling virtual memory space of network - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for speeding up access of memory space of the entire network by computers connected to a network.

2. Description of the Related Art An example of the configuration of a conventional network virtual memory space management device is shown in FIG. Computers 1 and 2 are connected to a network virtual memory space management device 10 and a storage unit in a local system via an internal bus 3, and access objects in the local system and computers connected to the network. Note that the number of computers is not relevant to the present invention, and the means for accessing objects is the same for each computer 1 and 2.

When the computer 1 accesses an object, it gives an object identifier to the object access circuit 4 via the internal bus 3 and requests access. The object access circuit 4 obtains the page number of the data area in which the object is stored from the object management table 5, and obtains the page number of the data area in which the object is stored. It is transferred from the storage device 7 to the memory 6 so that the computer 1 can access it.

If the object does not exist in the local system, the object access circuit 4 requests the network virtual memory space management device 10 to acquire the object, and stores the obtained object in the memory 6.

Next, an explanation will be given of the operation when transferring object 1 to another computer in response to an object 1 transfer request or the like from another computer.

When the control circuit 11 of the network virtual memory space management device is requested to transfer an object from the computer 1,
The control circuit 11 controls the data area retrieval circuit 13 via the internal bus 12 based on the object identifier given from the computer 1 . Itl control transfers the data area in which the corresponding object 1- is stored from the object access circuit 4 to the buffer memory 14. continue,
The control circuit t controls the packet creation circuit 15 to packetize the identifier of the object to be transferred and the data area, and causes the communication control circuit 16 to transfer the object. The communication control circuit 16 sends the packets on the buffer memory 14 to the network 20 according to the communication procedure. The packet analysis circuit 17 is used to analyze the contents of the received packet.

FIG. 5 shows a configuration example of an object transfer packet of a conventional network virtual memory space management device. The packet includes, in order, protocol control information 31 indicating the address, packet length, packet type, etc., and a transfer object identifier 3.
2. It consists of a transfer object storage data area 33. In this example, page 1 area 34. It consists of a page 2 area 35° and a page 3 area 36.

Problem 5 to be solved by the invention: In such a network virtual memory space management device,
When transferring multiple objects, the data area in which each object is stored is transferred as one packet, so if the multiple objects to be transferred have a common data area,
Duplicate data areas will be transferred. Since the data transfer rate within the network is typically much slower than the data transfer rate within the local system, such duplication of transfers reduces the efficiency of object access within the network virtual memory space. An object of the present invention is to provide a device that speeds up access to objects in a virtual memory space via a network.

Means for Solving the Problems In order to solve the above problems, the present invention provides a computer with the following features:
A buffer memory, a communication control circuit, a transfer object identifier holding circuit, a data area selection circuit, a data area retrieval circuit, a packet creation circuit, and a control circuit for controlling the circuits are provided so that six hedges are provided. It is something.

According to the above configuration, when a computer transfers a plurality of objects to another computer connected via a network, the control circuit transfers the identifier of the object requested to be transferred from the computer to the transfer object identifier holding circuit. causing a data area selection circuit to select data areas in which the held transfer objects are stored so as not to overlap, and causing a data area retrieval circuit to retrieve the selected data area from the computer;
A packet creation circuit is used to packetize the object and the data area and transfer the packet.

Embodiment FIG. 1 shows the configuration of a network virtual memory space management device according to an embodiment of the present invention. Note that circuits that are the same as those in the conventional example are given the same numbers and their explanations will be omitted.

When the computer 1 requests the network virtual memory space management device 50 to transfer a plurality of objects, the control circuit 51 uses the internal bus 62 to transfer the object identifier holding circuit based on the object identifier given from the computer 1. 53. Next, the data area selection circuit 54 is controlled to obtain the page numbers of the data areas in which all the objects are stored from the object access circuit 4 based on the stored object identifiers, and the page numbers of the data areas in which all the objects are stored are obtained from the object access circuit 4 based on the stored object identifiers. Select the page number for the minimum necessary data area to avoid any problems. this is. For example, when data areas are sequentially stored in each object as necessary, this can be achieved by not writing a data area for a new object that overlaps with a data area that already needs to be transferred. Then, the area extraction circuit 55 is controlled to transfer the data area from the object access circuit 4 to the buffer memory 56. Subsequently, the control circuit 51 controls the packet creation circuit 57 to packetize the identifier of the object to be transferred and the data area, and causes the communication control circuit 58 to transfer the object. The communication control circuit 58 sends the packets on the buffer memory 56 to the network 20 according to the communication procedure. The node analysis circuit 59 is used to analyze the contents of the received packet.

FIG. 2 shows an example of an object management table of the present invention. The object management table stores, for each object, an object identifier 61, a valid flag 62 indicating whether the object exists in the local system, and if so, whether it exists in memory. Page area configuration 63 showing the page area
Consists of.

Object) A71 indicates that it exists in memory and is stored at page number 1.2.3. object) B72, it exists in memory, page number 2,
3, 10.11. In the case of object) C73, it indicates that the object is located at page number 50 in external storage within the local system. In the case of object x, it indicates that it exists in another system within the network.

9. FIG. 3 shows an example of the structure of an object transfer packet of the network virtual memory space management device according to the present invention. This is object 1-871 and object) B72 in Figure 2.
When transferring a packet, the packet sequentially contains protocol control information 81 indicating the address, packet length, packet type, etc.
, transfer object identifiers 82 and 83 for each object, transfer object page configurations 84 and 85 for each object, and transfer object storage data area 86.

In this example, page 1 area 87. Page 2 area 8
8. Page 3 area 89. Page 10 area 90, page 1
Since the page 1.2.3 area of the common part of object A71 and object BT2 is shared, it takes 5/7 of the time compared to the case of transferring object A71 and object BT2 separately. . in general,
Since the data transfer speed between networks is about % or less of the transfer speed of a computer internal bus, even if there are few common parts between objects, it makes a large contribution to reducing the access time of 10,+-so.

Effects of the Invention As described above, according to the present invention, it is possible to provide a device that speeds up access to objects in a virtual memory space via a network, which is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a network virtual memory space management device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of an object management table of the present invention, and FIG. 3 is a diagram showing a network virtual memory space management device according to an embodiment of the present invention. 4 is a diagram showing an example of the configuration of a conventional network virtual memory space management device. FIG. 5 is a diagram showing an example of the configuration of an object transfer packet of a conventional network virtual memory space management device. FIG. 1.2... Computer, 4... Object access circuit, 5... Object management table, 6... Memory, 7... External Storage device, 20...Network, 50...
...Network virtual memory empty 11, -7 Intermediate management device, 51...Control circuit, 52...
internal bus, 53... transfer object identifier holding circuit, 54... data area selection circuit, 65...
...Data area retrieval circuit, 56...
Buffer memory, 57...Packet creation circuit,
58...Communication control circuit, 59...Packet analysis circuit, 61...Object identifier, 62
... Valid flag, 63... Page area configuration,
81...Protocol control information, 82...
Transfer object identifier, 84... Transfer object page configuration, 86... Transfer object storage data area. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A plurality of computers supporting virtual memory access are connected via a network, and each of the computers is provided with a buffer memory, a communication control circuit, a transfer object identifier holding circuit, a data area selection circuit, a data area retrieval circuit, and a packet creation circuit. a circuit, and a control circuit for controlling the circuit, and when a computer transfers a plurality of objects to another computer connected via a network, the control circuit transfers the identifier of the object requested to be transferred from the computer to the computer. causing the transfer object identifier holding circuit to hold it, causing the data area selection circuit to select data areas in which the held transfer objects are stored so as not to overlap, and retrieving the selected data area from the computer. A network virtual memory space management device characterized in that the object and the data area are extracted by a circuit, and the packet creation circuit packetizes and transfers the object and the data area.