Packet forwarding apparatus and method for virtual storage network switch
A network switch and transfer device technology, applied to electrical components, transmission systems, etc., can solve the problems of time-consuming communication between virtual devices, lower data transmission efficiency, and convenience of storage devices.
Active Publication Date: 2013-01-16
IND TECH RES INST
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Problems solved by technology
However, when the configuration of the access device is changed, the communication between the update of the virtual device and the user will be time-consuming, and the client also needs to install a software interface to communicate with the virtual device, which is not suitable for direct access to the storage device. convenience
In the in-band method, the virtual device is placed in the data access path between the user and the storage device. Although the storage device group is changed, the management is more convenient, and it can provide the convenience of direct access to the storage device by the client. , however, the amount of data such as the client's data query to the virtual device will share the same bandwidth with the real data transmission path, which will reduce the data transmission efficiency
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[0040] In the implementation example of this disclosure, in a network protocol, such as iSCSI network protocol, in the switch environment established by the connection, a bridge for direct forwarding of packets is provided, and the processing flow of iSCSI packets from the user end to the storage end There is no need to go through complicated actions such as dismantling, reading, forwarding, and creating headers of redundant packets. FIG. 5 is a schematic diagram of a process flow of direct transfer of iSCSI PDU packets from a client to a storage, and is consistent with certain embodiments of the present disclosure.
[0041] Referring to FIG. 5 , as indicated by reference number 510 , in the processing flow from the client 502 to the storage 503 , the iSCSI PDU only receives the packet header for processing. Then, as shown by reference numeral 520, the corresponding iSCSI connection information is found through the direct forwarding mechanism. As shown by reference numeral 30...
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The invention discloses a virtualization storage network switch packaging and transmitting device and a method thereof. The invention can be applied in a switch environment established by Internet small computer system interface (iSCSI) connecting lines. The packing and transmitting device comprises a header retriever, a distributor, and a transmitting unit. When system authentication of the iSCSI conference connecting lines is completed, the header extractor receives at least one package on the iSCSI connecting lines and retrieves the header data of the at least one package; the distributor determines the flow direction of the received package; the transmitting unit performs direct package transmitting actions between the front end and the back end of the established connecting line and the actions comprises an action of converting the virtual address received by the distributor into a real address and an action of establishing a corresponding relationship between an client interfaceand a storage interface and transmitting load data entrained in the connecting lines.
Description
technical field [0001] The present invention relates to a packet forwarding device and method for a virtualization switch (virtualization switch), which can be applied to a switch established by an Internet Small Computer System Interface (iSCSI) connection Environment. Background technique [0002] The networking of storage devices is one of the trends in the development of the Internet, and the iSCSI transport protocol is an emerging network storage technology standard. Storage area network (Storage Area Network, SAN) refers specifically to the network that connects storage devices and servers, and uses the network to connect storage devices in series. Compared with redundant array of independent disks (Redundant Array of Independent Disks, RAID) and small computer system interface (Small Computer System Interface, SCSI) and other technologies that directly connect servers and storage devices, network storage technology not only has high-speed transmission capabilities, ...
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IPC IPC(8): H04L29/08H04L29/06
Inventor 钟逸呈李晓晖江彦宏陈启钧
Owner IND TECH RES INST