JP2003324469A - Storage network layer integrating method and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage network layer integrating method and apparatus in which each individual storage accesses to mutually different communicating parties are separated on a label network. <P>SOLUTION: In the storage access between computers 11, 12 and 13 and storage system 21, 22 and 23 via a label network 30, a storage identifier/label identifier correspondence DB part 31 is provided as a table of correspondence from a set of transmission source storage identifiers and destination storage identifiers to the destination label identifier and a flow of the storage access with a different set of communicating parties is separated on the label network 30. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to traffic control in a network system in which a computer system and a storage are connected by a label network, and more particularly to a technique for separating individual storage access flows on the label network.

[0002]

2. Description of the Related Art Conventionally, when a computer system under the control of the same label storage gateway device accesses a storage under the control of another label storage gateway device via a label network, all storage accesses are performed in the same label flow. Was confused.

Further, in the technique of accessing a storage via a label network, since the storage access is encapsulated and transmitted in a packet with a label, the label network alone cannot separate each storage access. .

This is because even if a plurality of computer systems and storages are connected to the storage area network (SAN), they are encapsulated by a single label in the gateway device. In other words, even if the storage accesses of different communication partners are encapsulated in the packet having the same label on the label network, the flow of individual storage access can be controlled on the label network. There wasn't. Here, the "flow" means a packet flow, and more specifically, a packet flow corresponding to a storage frame exchanged between a set of specific storage identifiers.

[0005]

The present invention has been made in view of the above circumstances, and its object is to:
It is an object of the present invention to provide a storage network layer integration method and device capable of separating individual storage accesses of different communication partners on a label network.

[0006]

In order to achieve the above object, according to the present invention, in storage access between a computer and a storage via a label network,
A correspondence table from a pair of a transmission source storage identifier and a destination storage identifier to a destination label identifier is provided, and a storage frame related to storage access between a storage network and a label network is referred to by referring to the correspondence table It is characterized in that the packet is converted into a packet having a destination label identifier corresponding to the storage identifier and the destination storage identifier.

According to the present invention, a storage frame relating to storage access between computer storages of different communication partners can be converted into a packet having a different label identifier, so the storage access can be performed by referring to the label identifier of the packet. Can control the flow of. That is, it is possible to perform flow control by distinguishing individual storage accesses with different communication partners on the label network using only the label identifier. The flow control includes, for example, priority control, access control, flow rate measurement, flow rate restriction, and the like.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A network system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram of a network system according to the present embodiment, and FIG. 2 is a diagram showing an example of a correspondence table.

As shown in FIG. 1, in this network system, a plurality of storage networks 10, 20 are provided.
ATM (Asynchronous Transf
erMode) network and MPLS (MultiProtoc)
It is connected via a label network 30, such as an ol Label Switching network. The storage network 10 includes computer systems 11, 1 such as personal computers and workstations.
2 and 13 are connected. Further, storage systems 21, 22, 23 such as a tape library device and a disk array device are connected to the storage network 20. The computer systems 11, 12, 13 are connected to the storage system 21, via the label network 30.
22 and 23 are accessed.

The label network 30 and the storage networks 10 and 20 include a storage label conversion unit 40,
It is connected through 50. Storage label converter 4
0 and 50 are label identifier assigning units 41 and 51 that add header information such as a label identifier when converting from the storage networks 10 and 20 to the label network 30.
And label identifier removing units 42 and 52 for removing header information such as a label identifier when converting from the label network 30 to the storage networks 10 and 20.

The label network 30 is provided with a storage identifier / label identifier correspondence DB section 31. In the DB unit 31, as shown in FIG. 2, a destination label identifier is associated with a set of a computer system and a storage system to be connected, that is, a set of a source storage identifier and a destination storage identifier. .
In the example of FIG. 2, the first computer system 11 to the second computer system 11
In the storage access flow to the storage system 22, A: 2 is assigned as the label identifier on the first computer system 11 side, and B: 2 is assigned as the label identifier on the second storage system 22 side. Label identifier assigning units 41, 51 of the storage label converting units 40, 50
Adds the label identifier referring to the DB unit 31 as header information.

The DB unit 31 is used by the label network 3
If it is accessible within 0, the installation location does not matter. For example, it is assumed to be implemented as a function of a router or a switch. Further, one of the machines that realizes the storage label conversion unit may be set as a master, the DB unit 31 may be provided in the master, and machines that realize other storage label conversion units may inquire of the master.

A label management unit 32 is provided in the label network 30. This label management unit 32
In communication within the label network 30, performs flow priority control, access limitation, flow rate measurement, and flow rate limitation. In the actual communication in the label network, the label management unit 32 distinguishes the flow for each destination label identifier as a function implemented in a label router, a label switch, a label network management tool, etc.
Priority control, access restriction, flow rate measurement, flow rate restriction can be added.

As described above, according to the present invention, regarding the storage access between the computer system and the storage, the flow of the storage access can be distinguished by the destination label identifier of the packet on the label network.
Therefore, the flow control of the packet related to the storage access can be performed by the label router, the label switch, the label network management tool and the like.

[0015]

As described above in detail, since individual storage accesses having different communication partners can be distinguished from each other on the label network by using only the label identifier, such individual storage accesses can be identified by the label identifier. It becomes possible to separate on the label network by using.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a network system according to the present embodiment.

FIG. 2 is a diagram showing an example of a correspondence table.

[Explanation of symbols]

10, 20 ... Storage network, 11, 12, 1
3 ... Computer system, 21, 22, 23 ... Storage system, 30 ... Label network, 31 ... Storage identifier Label identifier correspondence DB unit, 32 ... Label management unit, 40, 50 ... Storage label conversion unit, 41, 5
1 ... Label identifier assigning unit, 42, 52 ... Label identifier removing unit

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Claims (4)

[Claims] 1. A storage access between a computer and a storage via a label network, comprising a correspondence table from a set of a source storage identifier and a destination storage identifier to a destination label identifier, the storage access between the storage network and the label network. Storage frame related to
A storage network layer integration method comprising: referring to the correspondence table and converting to a packet having a destination label identifier corresponding to a source storage identifier and a destination storage identifier of the storage frame. 2. The packet related to storage access flowing through the label network is subjected to at least one flow control among priority control, access restriction, flow rate measurement, flow rate restriction, etc. within the label network. Storage network layer integration method. 3. In storage access between a computer and a storage via a label network, a correspondence table from a set of a source storage identifier and a destination storage identifier to a destination label identifier and a storage access between the storage network and the label network are provided. This storage frame
A storage network layer integration system comprising: means for converting to a packet having a destination label identifier corresponding to a source storage identifier and a destination storage identifier of the storage frame with reference to the correspondence table. 4. A flow control means for performing at least one of priority control, access restriction, flow rate measurement, flow rate restriction, etc. within the label network for a packet relating to storage access flowing through the label network. The storage network layer integration system according to claim 3.