CN101997924A - Cloud storage file transfer protocol (CFTP) - Google Patents

Cloud storage file transfer protocol (CFTP) Download PDF

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Publication number
CN101997924A
CN101997924A CN2010105531757A CN201010553175A CN101997924A CN 101997924 A CN101997924 A CN 101997924A CN 2010105531757 A CN2010105531757 A CN 2010105531757A CN 201010553175 A CN201010553175 A CN 201010553175A CN 101997924 A CN101997924 A CN 101997924A
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China
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terminal
file
node
cloud
clouds
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CN2010105531757A
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Chinese (zh)
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杨文军
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杨文军
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Abstract

The invention discloses a novel cloud storage file transfer protocol (CFTP), which is a method for transferring files with a user terminal by using a cloud terminal provided with a cloud computation or storage environment, wherein after a terminal sends a file transfer request, a target file is split into a plurality of data blocks to be sent to a storage node of the cloud terminal for caching, a cloud terminal server is used for calculating out an optimum path and sending the optimum path to the terminal, and the user terminal acquires optimum download and upload speeds.

Description

Cloud storage file host-host protocol (CFTP)

Technical field

The present invention relates to computer network field, relate in particular to the file transfer in cloud computing, the cloud storage system.

Background technology

Cloud computing (Cloud Computing) is the product that Distributed Calculation (Distributed Computing), parallel computation (ParallelComputing), grid computing (Grid Computing), the network storage (Network Storage Technologies), virtual (Virtualization), load balancing traditional calculations machine technologies such as (Load Balance) and network technical development merge.It is integrated into a perfect system with powerful calculating ability to the relatively low computational entity of a plurality of costs by network, and by various application services powerful computing ability is distributed in terminal use's hand.Its basic principle is to carry out for many computers by network allocation calculation task.Every computer is called the system for cloud computing computing node, and whole computer integral body of carrying out calculation task are called high in the clouds, and other equipment such as the computer of task requests or mobile phone that send are called terminal.

The cloud storage is meant by functions such as cluster application, grid or distributed file systems, a large amount of various dissimilar memory devices in the network are gathered collaborative work by application software, a system of storage and Operational Visit function externally is provided jointly.When the core of cloud computing system computing and processing is the storage of mass data and management, just need a large amount of memory device of configuration in the cloud computing system, cloud computing system just is transformed into a cloud storage system so, is the cloud computing system of core so the cloud storage is one with storage and management.

The File Transfer Protocol that the terminal of cloud computing at present and the general employing of the file transfer in high in the clouds are popular and based on the WEBDAV agreement of TCP/IP.File Transfer Protocol has advantages such as speed is fast, stable, support breakpoint transmission, and shortcoming is the support that lacks distributed storage, does not support collaborative work.The WEBDAV agreement can be supported collaborative work, and shortcoming is the transmission instability, does not support breakpoint transmission, the file that surpasses 100M is supported non-constant.

There is the slow problem of access speed between the different operators in domestic present network, therefore in the file transfer of traditional the Internet, the agreement that also has a kind of frequent use, point-to-point transmission agreement (P2P), this agreement advantage is that speed is very fast, supports multiserver to download simultaneously, and shortcoming is to monopolize a large amount of network bandwidths of terminal, cause other network service quality variation, so this agreement is not generally adopted in cloud computing and cloud storage.

This cloud stores the advantage that host-host protocol (CFTP) not only combines FTP, TCP/IP, P2P agreement, added high in the clouds server computing function simultaneously, can be in quick, stable transmission, and support breakpoint transmission, support the cloud memory device, support collaborative work, not other network service bandwidths of occupied terminal.Compare with the P2P agreement, this agreement is to utilize the computing capability in high in the clouds and cloud memory node and caching mechanism thereof to reach the speed optimum, transmission can be ensured effectively that the P2P agreement then utilizes the terminal of downloading to come optimal speed, and speed and stability all can not get ensureing.This protocol core operation principle is: after terminal sent file transfer requests, file destination was split into a lot of data blocks and sends to high in the clouds memory node buffer memory, and the high in the clouds server calculates optimal path, sends to terminal then.

Summary of the invention

Use has the high in the clouds of cloud computing or cloud storage environment and a kind of method that user terminal carries out file transfer, comprise the calculating optimal path, and data cached at computing node or cloud memory node that the path comprised, use terminal to obtain best the download and uploading speed.This agreement sub server end and terminal.

The protocol server end is deployed in the high in the clouds of cloud computing environment, after agreement starts, can active detecting and record institute node beyond the clouds, and network speed and network busy extent between these nodes are calculated in timing.

Protocol terminal is deployed on terminal equipment and each node of high in the clouds simultaneously, after terminal is sent file transfer requests, this consultation is activated, between at first can the test terminal, terminal is by the optimal path node speed, the calculation document size obtains both delivery times, if the transmission time between the terminal is less than target terminal and the terminal time (such as file transfer in the local area network (LAN)) by the optimal path node, then direct transfer files between terminal need not through high in the clouds.If the transmission time between the terminal then started the high in the clouds buffer memory, and quickens to file transfer greater than the transmission time of terminal by the optimal path node.

Mutual transfer files between the node of high in the clouds is file source node and destination node examination two terminals then.

Before the file transfer, at first the file source terminal can be passed through CRC algorithm computation file unique identifier, and identification code is sent to target terminal, and target terminal can calculate unique identifier once more after file transfer is finished, and whether check file correct.

File is the piecemeal transmission in transmission course, each file data blocks also can split into the more data bag and transmit, different nodes all can be downloaded different or identical file data blocks simultaneously with terminal, and the file data blocks of each node server distributes according to network transfer speeds and network bandwidth idle condition, target terminal finally obtains all data blocks, and all data blocks are merged into file destination.

First packet in the file data blocks, comprise whole file unique identifier, piecemeal file data size, the Position Number of file data blocks, the unique identifier of a last blocks of files and presents piece unique identifier, whether these information are used for certain node and receive composite document cache file behind the file data blocks, and discern these file data blocks and changed, and guarantee file security.

Packet comprises the identifying information of agreement to packet, and the positional information of packet and ciphered data content receive behind the packet and can and store in the temporary file data decryption, final composite document data block.

This agreement has very big acceleration to exchange files between the terminal of cross operator.The high in the clouds metadata cache has great speed to promote to a large amount of different same files of terminal downloads, and saves the net flow that collapses.

Brief Description Of Drawings

Can better understand the details of structure of the present invention and this two aspect of operation with reference to the accompanying drawings, wherein:

Fig. 1 is that the user of cloud storage file host-host protocol of the present invention (CFTP) uses schematic diagram

Fig. 2 is the realization flow figure of CFTP of the present invention

Fig. 3 is the high in the clouds transfer process figure of CFTP of the present invention

Fig. 4 is the functional block diagram of CFTP of the present invention

Embodiment

At first the use of this agreement to as if can use the system of cloud storage because there is not the memory node in high in the clouds can't set up file cache.

Referring to Fig. 1 and Fig. 2, terminal A and terminal B can be the user PC computer, smart mobile phone or panel computer etc. other support the equipment of storage, also certain node in high in the clouds, when being the node in high in the clouds, we are terminal to this node examination.

Suppose that terminal A sends file transfer requests to the terminal B at file destination place, terminal B can also be simultaneously the idle relatively node request of sending (because the existence of cloud storage system to high in the clouds recently at first, so this node necessarily exists), notice high in the clouds has file need send terminal A to, this node begins to calculate optimal path after receiving request, and the time of the file that sends by optimal path receiving terminal B of computing terminal A, and feed back to terminal B.When calculating the optimal path transmission time, the high in the clouds node can be searched the file cache on the optimal path simultaneously, if find that file cache can deduct the accelerating time that respective cache is brought.

The time of terminal B file of the direct receiving terminal B of computing terminal A when waiting for high in the clouds node feedback, if the transmission time between terminal A, B is less than the transmission time by optimal path, then directly give terminal A with file transfer, otherwise terminal B notice high in the clouds node adopts the optimal path transmission.

In case started the optimal path transmission, will use the powerful calculating ability and the storage capacity in high in the clouds, as shown in Figure 3, the network speed and the idle condition allocating task of all nodes on the nearest computing node of terminal B can be according to optimal path, this task can send to all joint and terminal A, and terminal A and interdependent node can begin file in download simultaneously.

File transmits task might not comprise the All Files piece at first.When part of nodes has been finished the reception task, can set up file cache automatically, and the result is fed back to the nearest node from terminal B, after being fed back, this node recomputates and allocating task, and be transmitted until the All Files data and finish.

According to the real network operating position of terminal B, also might just begin downloading task and only distribute to partial data to from the nearest node of terminal B, after finishing data block, this node receiving data from this node simultaneously by recomputating by other nodes and terminal A.

Break down if be responsible for the node of allocating task in whole file delivery procedure, other nodes can be taken over this node allocating task automatically.

Fig. 4 is the functional block diagram of this agreement, and this agreement at first can be monitored certain computer equipment port, begins to handle after the packet that meets this agreement arrives, and packet has comprised protocol command, mainly is divided into six kinds of functions shown in Figure 4.

Calculation command: above said terminal B sends the file request of transmitting and just belongs to calculation command, and terminal B can require node to calculate optimal path, distributes transformation task.Then can receive the order that task allocation node sends at other nodes and begin to execute the task.

Seek buffer memory: the unique identifier that can comprise file destination in the order of searching buffer memory, judged whether buffer memory by this this node of identification code, can feed back if having, feedback information comprises whether existing, the position of cache file in file destination and the identification code of cache file.

Receive buffer memory: this this node of order request receives file data from certain node or terminal, this node can at first receive identifying information, whether and it is effective to differentiate data, begin to receive data then, after specific data finishes receiving, can merge written buffer memory, and relevant information is fed back to other nodes on the optimal path.

Send buffer memory: this this node of order request sends data cached to other nodes, equally for safety of files, the relevant information that at first can send file destination and cache file is to other nodes, confirming that data begin to send data after correct, feed back to the node of allocating task after being sent completely.

Node changes: this order is all can regularly carry out when whether the data task is arranged, mainly be in order to write down all from the nearer node of this node and this node speed to these nodes, comprise increase newly and be removed, like this can be the fastest calculate optimal path, new data more after monitoring each time.

Terminal tests the speed: this order is to be sent by the terminal that file transmission task is arranged, and obtains from the nearest node of terminal with this.

Claims (3)

1. the document transmission method under the cloud storage environment comprises that utilizing the cloud memory device to carry out file splits buffer memory, and computing node calculates optimal path, and makes it to reach the fastest transmission speed.
2. the method for claim 1, wherein each cloud memory node and file destination place terminal simultaneously the terminal to other cloud memory nodes and demand file place send file data, and can synthesize cache file.
3. the method for claim 1 by calculating and allocating task from the nearest high in the clouds node of file destination place terminal, if in officely pragmaticly execute that this node breaks down in the process, can be replaced by other nodes.
CN2010105531757A 2010-11-22 2010-11-22 Cloud storage file transfer protocol (CFTP) CN101997924A (en)

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