CN104796276A - Link switching method and system - Google Patents
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- CN104796276A CN104796276A CN201410026793.4A CN201410026793A CN104796276A CN 104796276 A CN104796276 A CN 104796276A CN 201410026793 A CN201410026793 A CN 201410026793A CN 104796276 A CN104796276 A CN 104796276A
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Abstract
The invention discloses a link switching method and system, and aims at solving the problem that a blade host is incapable of automatic switching when a link used at present has faults and further causes interruption of data transmission in the prior art. The blade host includes a main IB Switch module and a standby IB Switch module, and a link exists between any IB Switch module and each IB Switch of the IB sub-network in which the blade host is arranged. According to the pre-determined network topology structure of the IB sub-network, the blade host determines a second link when it is determined that a first link that is used at present has faults; both the first link and the second link are connected to the main IB Switch module of the blade host; and the first link is switched to the second link, so that the blade cost can use the second link to transmit data.
Description
Technical field
The present invention relates to information and business support technical field, particularly relate to a kind of link switch-over method and system.
Background technology
Interconnect architecture (InfiniBand is called for short IB) network is a kind of high broadband, express network interconnection technique of open standard, and this technology does not connect for general networking, and its major design object is the connectivity problem for server end.Therefore, InfiniBand technology is mainly applied to server and server, server and memory device (such as storage area network (Storage Area Network, SAN) and direct storage attachments) and (such as local area network (LAN) (Local Area Network between server and network, LAN), wide area network (Wide Area Network, WAN) and Internet (internetwork is called for short internet)) communication.
As shown in Figure 1, be existing IB network topology structure figure.Wherein, two network interface cards in main frame are connected respectively on two different switches (namely only there is a link between main frame and each switch), and cascade between two switches.Network card binding is done at host computer side, binding pattern is main-standby mode (Active-Standby mode), when active link occurs fault, standby link takes over the active link broken down, simultaneously become active pattern from standby pattern, with ensure data in transmitting procedure can not because of a certain link occurs fault Transmission.With reference to figure 1, when the link of 9000 correspondences or network interface card break down, on the link that transfer of data is just switched to 9002 correspondences and network interface card.
Above-mentioned this network topology structure is to traditional use peripheral hardware interconnect standard (Peripheral ComponentInterconnect, PCI) main frame, once the link occurs fault of current use, will notify that mainframe network breaks down by the first line of a couplet testing mechanism of IP agreement, therefore when host exchange breaks down, transfer of data can be switched on backup switch, when major network card or link occurs fault corresponding to major network card, transfer of data can be switched on network interface card for subsequent use and corresponding link.
But, for using blade framework (in the rack cabinet of the calibrated altitude server unit of the multiple cassette of plug-in mounting, realize High Availabitity and high density) main frame (referred to as blade main frame), if by blade host application to above-mentioned traditional network topology structure, once the link failure of current use, the first line of a couplet testing mechanism of IP agreement also can notify that blade mainframe network breaks down, but because the hardware structure of blade main frame inside has been different from traditional host framework, its blade is integrated with Host Channel Adapters (HostChannel Adapter, HCA) block, the IB Switch(interconnect architecture switch of HCA card and blade main frame inside) model calling, and IB Switch module does not have the function of first line of a couplet testing mechanism, therefore whether the link of no matter current use breaks down, on blade, HCA card is all the state being connected (up) with the connectivity port of IB Switch module all the time, therefore blade main frame cannot know network failure situation.In this case, blade main frame can send data to the link that main IB Switch module is corresponding all the time, cannot realize network service and be switched to IB Switch module for subsequent use from main IB Switch module, thus cause the interruption of transfer of data.
Summary of the invention
The embodiment of the present invention provides a kind of link switch-over method and system, and the blade main frame existed in order to solve prior art initiatively can not switch when the link occurs fault of current use thus cause the problem of data-transmission interruptions.
The embodiment of the present invention is by the following technical solutions:
A kind of link switch-over method, main interconnect architecture switch IB Switch module and IB Switch module for subsequent use is there is in blade main frame, and all there is link between each IB Switch in the IB subnet at any one IB Switch module and described blade main frame place, described method comprises:
When described blade main frame is according to the network topology structure of self the place IB subnet pre-determined out, when judging the first link occurs fault of current use, determine the second link; Wherein, described first link and described second link all with the main IB Switch model calling in described blade main frame;
From described first link switching to described second link, described blade main frame is enable to use described second link transmission data.
Wherein, described method also comprises:
When described blade main frame determines that the main IB Switch module connecting described first link breaks down, determine the link with the IB Switch model calling for subsequent use in described blade main frame;
From described first link switching to the link with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with described IB Switch model calling for subsequent use.
Wherein, at least two are had with the link of described IB Switch model calling for subsequent use; Then
From described first link switching to the link with described IB Switch model calling for subsequent use, enable described blade main frame use the link transmission data with described IB Switch model calling for subsequent use, specifically comprise:
Determine the weights with every bar link of IB Switch model calling for subsequent use;
From described first link switching to the link of the maximum weight with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with the maximum weight of described IB Switch model calling for subsequent use.
Wherein, described network topology structure is determined in the following manner:
Subnet manager SM in described IB subnet detects the node in described IB subnet by sending subnet detection packet to described IB subnet, and generates the network topology structure of described IB subnet according to result of detection.
Wherein, each IB Switch cascade in described IB subnet, and for each IB Switch module in described blade main frame:
The link existed between each IB Switch in the subnet at current I B Switch module and described blade main frame place is bound into a virtual link.
A kind of link switching system, be applied in interconnect architecture IB subnet, described system comprises:
At least two interconnect architecture switch IB Switch and at least one blade main frame, main IB Switch module and IB Switch module for subsequent use is there is in described blade main frame, and all there is link between any one IB Switch module and each IB Switch, wherein:
Described blade main frame, for when the network topology structure according to the described IB subnet pre-determined out, when judging the first link occurs fault of current use, determines the second link; From described first link switching to described second link, described blade main frame is enable to use described second link transmission data; Wherein, described first link and described second link all with the main IB Switch model calling in described blade main frame.
Wherein, described blade main frame also for:
When determining that the main IB Switch module connecting described first link breaks down, determine the link with the IB Switch model calling for subsequent use in described blade main frame; From described first link switching to the link with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with described IBSwitch model calling for subsequent use.
Wherein, at least two are had with the link of described IB Switch model calling for subsequent use; Then
Described blade main frame, specifically for:
Determine the weights with every bar link of IB Switch model calling for subsequent use; From described first link switching to the link of the maximum weight with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with the maximum weight of described IB Switch model calling for subsequent use.
Wherein, described system also comprises:
Subnet manager SM, for detecting the node in described IB subnet by sending subnet detection packet to described IB subnet, and generates the network topology structure of described IB subnet according to result of detection.
Wherein, each IB Switch cascade in described IB subnet, and for each IB Switch module in described blade main frame:
The link existed between each IB Switch in the subnet at current I B Switch module and described blade main frame place is bound into a virtual link.
The beneficial effect of the embodiment of the present invention is as follows:
In the embodiment of the present invention, when first link occurs fault with main IB Switch model calling of the current use of blade main frame, can on the basis not switching active and standby IB Switch module, switch to the second link of main IBSwitch model calling to transmit data, this mode increasing redundant link in IB subnet solves the blade main frame existed in prior art and initiatively can not switch when the link occurs fault of current use thus cause the problem of data-transmission interruptions.
Accompanying drawing explanation
Fig. 1 is existing IB network topology structure figure;
The realization flow figure of a kind of link switch-over method that Fig. 2 provides for the embodiment of the present invention;
The link switch-over method that Fig. 3 provides for the embodiment of the present invention in actual applications realize schematic diagram;
The structural representation of a kind of link switching system that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Initiatively can not switch when the link occurs fault of current use to solve the blade main frame existed in prior art thus cause the problem of data-transmission interruptions, embodiments providing a kind of link switch-over method and system.In this technical scheme, when first link occurs fault with main IB Switch model calling of the current use of blade main frame, can on the basis not switching active and standby IB Switch module, switch to the second link of main IB Switch model calling to transmit data, this mode increasing redundant link in IB subnet solves the blade main frame existed in prior art and initiatively can not switch when the link occurs fault of current use thus cause the problem of data-transmission interruptions.
Below in conjunction with Figure of description, embodiments of the invention are described, should be appreciated that embodiment described herein is only for instruction and explanation of the present invention, is not limited to the present invention.And when not conflicting, the embodiment in this explanation and the feature of embodiment can be combined with each other.
Embodiments provide a kind of link switch-over method, as shown in Figure 2, for the realization flow figure of the method, wherein, main IB Switch module and IB Switch module for subsequent use is there is in blade main frame, and all there is link between each IB Switch in the IB subnet at any one IB Switch module and this blade main frame place, the method specifically comprises the steps:
Step 21, when this blade main frame is according to the network topology structure of self the place IB subnet pre-determined out, when judging the first link occurs fault of current use, determines the second link; First link and the second link all with the main IB Switch model calling in this blade main frame;
In the embodiment of the present invention, the network topology structure of the IB subnet at blade main frame place can be determined in the following manner:
Main subnet manager SM in this IB subnet detects the node in this IB subnet by sending subnet detection packet to IB subnet, and generates the network topology structure of this IB subnet according to result of detection.
Wherein, SM is one of function common in IB network, realizes the centralized management to IB subnet.In the subnet detection packet that SM sends, the most frequently used one is directed routing bag, initial path field (init_path) is had inside directed routing bag, the path of carrying out is wrapped in instruction, there is hop count field (hop_count), the jumping figure of instruction bag process, has return path field (return_path), the path that record response packet carries out, rely on above-mentioned information, subnet detection packet just can complete all topologys and search and initial work.What init_path and return_path recorded is actually port numbers, and instruction present node should send bag from which port.
The detection flow process of subnet manager is mainly as follows: first SM sends the subnet management detection packet SMP of a Get (Nodeinfo) to its resident local node, after meeting with a response, SM judges whether this node probed, if there is no this node probed, then it is added topological database, if this node probed, SM is by Get(Portinfo) SMPs obtains the port status information of this node, if CA port, then it is added port list, if the management port of switch, then configure this port, carry out optimum configurations, then the port of discovery is joined in the list item of port object (po).Then the port status information by obtaining, SM judges whether the other end of this port connects miscellaneous equipment, if connect miscellaneous equipment; continue send Get(nodeinfo) SMP detect, if, do not judge whether detection terminates, the words do not terminated, continue detection, just terminate to detect flow process if terminate.
General, SM may reside in any one port of any one CA, switch or router, and in order to prevent single point failure, multiple SM can be there is in IB subnet, a main SM and multiple backup SM, when backup SM detects that main SM is dead, one can be selected to back up SM and be called main SM, adapter subnet management is weighed.
Step 22, from the first link switching to the second link, enables this blade main frame use the second link transmission data.
Due to the first link and the second link all with the main IB Switch model calling in blade main frame, therefore in fact do not switch IB Switch module.And the first link and the second link can also be bound into a virtual link by dual link binding technology in advance, that is, no matter using the first link transmission data or transmit the second link transmission data, is all this virtual link transmission data by binding.
In the embodiment of the present invention, when first link occurs fault with main IB Switch model calling of the current use of blade main frame, can on the basis not switching active and standby IB Switch module, switch to the second link of main IBSwitch model calling to transmit data, this mode increasing redundant link in IB subnet solves the blade main frame existed in prior art and initiatively can not switch when the link occurs fault of current use thus cause the problem of data-transmission interruptions.
As shown in Figure 3, for above-mentioned link switch-over method in actual applications realize schematic diagram.Wherein, there are two IB Switch modules in blade main frame 1, one is main IB Switch module, one is IBSwitch module for subsequent use, compared with prior art, between IB Switch1 and the IB Switch module for subsequent use of blade main frame 1, add a link 9001, between IB Switch2 and the main IB Switch module of blade main frame 1, increase a link 9003, and cascade between IB Switch1 and IB Switch2.
With reference to figure 3, carried out the nodal test of full IB subnet by SM when IB subnet initialization, generating network topological structure, and it is inner at blade main frame 1, by dual link binding technology, link 9000 and 9003 is bound into a virtual link, and link 9001 and 9002 is bound into another one virtual link.
When link 9000 between IB Switch1 and the main IB Switch module of blade main frame 1 breaks down, because IB Switch module does not have first line of a couplet testing mechanism, therefore main IB Switch module and IBSwitch module for subsequent use can not switch, and SM can carry out nodal test according to network detection flow process again, and regenerate new network topology structure according to the routing algorithm preset.Thus determine the link 9003 connecting main IBSwitch module, and switch to link 9003 and enable data from the IB Switch module transfer for subsequent use of blade main frame 1 to IB Switch2.
Therefore, in this IB subnet, when the link down of current use, the network service of blade main frame can not interrupt, thus reaches the object of the safety and stability transmission ensureing data.
Further, under this IB network architecture, when blade main frame judges that the main IB Switch module of link 9000 and 9003 breaks down, will be switched to on the link of IB Switch model calling for subsequent use, such as data are switched to link 9002 from link 9000, thus ensure that transfer of data is not interrupted.
Owing to having two with the link of IB Switch model calling for subsequent use, therefore first can determine the weights with every bar link of IB Switch model calling for subsequent use, and then be switched to the link of the maximum weight of IB Switch model calling for subsequent use to transmit data.
Accordingly.The embodiment of the present invention additionally provides a kind of link switching system, and as shown in Figure 4, be the structural representation of this system, this system is applied in interconnect architecture IB subnet, comprising:
At least two interconnect architecture switch IB Switch41 and at least one blade main frame 42, main IB Switch module and IB Switch module for subsequent use is there is in described blade main frame 42, and all there is link between any one IB Switch module and each IB Switch41, wherein:
Described blade main frame 42, for when the network topology structure according to the described IB subnet pre-determined out, when judging the first link occurs fault of current use, determines the second link; From described first link switching to described second link, described blade main frame is enable to use described second link transmission data; Wherein, described first link and described second link all with the main IB Switch model calling in described blade main frame.
Wherein, described blade main frame 42 also for:
When determining that the main IB Switch module connecting described first link breaks down, determine the link with the IB Switch model calling for subsequent use in described blade main frame; From described first link switching to the link with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with described IBSwitch model calling for subsequent use.
Wherein, when the link with described IB Switch model calling for subsequent use has at least two, described blade main frame 42, specifically for:
Determine the weights with every bar link of IB Switch model calling for subsequent use; From described first link switching to the link of the maximum weight with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with the maximum weight of described IB Switch model calling for subsequent use.
Further, described system can also comprise:
Subnet manager SM, for detecting the node in described IB subnet by sending subnet detection packet to described IB subnet, and generates the network topology structure of described IB subnet according to result of detection.
Wherein, each IB Switch41 cascade in described IB subnet, and for each IB Switch module in described blade main frame 42:
The link existed between each IB Switch41 in the subnet at current I B Switch module and described blade main frame 42 place is bound into a virtual link.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a link switch-over method, it is characterized in that, main interconnect architecture switch IB Switch module and IB Switch module for subsequent use is there is in blade main frame, and all there is link between each IB Switch in the IB subnet at any one IB Switch module and described blade main frame place, described method comprises:
When described blade main frame is according to the network topology structure of self the place IB subnet pre-determined out, when judging the first link occurs fault of current use, determine the second link; Wherein, described first link and described second link all with the main IB Switch model calling in described blade main frame;
From described first link switching to described second link, described blade main frame is enable to use described second link transmission data.
2. the method for claim 1, is characterized in that, described method also comprises:
When described blade main frame determines that the main IB Switch module connecting described first link breaks down, determine the link with the IB Switch model calling for subsequent use in described blade main frame;
From described first link switching to the link with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with described IB Switch model calling for subsequent use.
3. method as claimed in claim 2, is characterized in that there are at least two with the link of described IB Switch model calling for subsequent use; Then
From described first link switching to the link with described IB Switch model calling for subsequent use, enable described blade main frame use the link transmission data with described IB Switch model calling for subsequent use, specifically comprise:
Determine the weights with every bar link of IB Switch model calling for subsequent use;
From described first link switching to the link of the maximum weight with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with the maximum weight of described IB Switch model calling for subsequent use.
4. the method as described in as arbitrary in claims 1 to 3, it is characterized in that, described network topology structure is determined in the following manner:
Subnet manager SM in described IB subnet detects the node in described IB subnet by sending subnet detection packet to described IB subnet, and generates the network topology structure of described IB subnet according to result of detection.
5. the method as described in as arbitrary in claims 1 to 3, is characterized in that, each IB Switch cascade in described IB subnet, and for each IB Switch module in described blade main frame:
The link existed between each IB Switch in the subnet at current I B Switch module and described blade main frame place is bound into a virtual link.
6. a link switching system, is characterized in that, be applied in interconnect architecture IB subnet, described system comprises:
At least two interconnect architecture switch IB Switch and at least one blade main frame, main IB Switch module and IB Switch module for subsequent use is there is in described blade main frame, and all there is link between any one IB Switch module and each IB Switch, wherein:
Described blade main frame, for when the network topology structure according to the described IB subnet pre-determined out, when judging the first link occurs fault of current use, determines the second link; From described first link switching to described second link, described blade main frame is enable to use described second link transmission data; Wherein, described first link and described second link all with the main IB Switch model calling in described blade main frame.
7. system as claimed in claim 6, is characterized in that, described blade main frame also for:
When determining that the main IB Switch module connecting described first link breaks down, determine the link with the IB Switch model calling for subsequent use in described blade main frame; From described first link switching to the link with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with described IBSwitch model calling for subsequent use.
8. system as claimed in claim 7, is characterized in that there are at least two with the link of described IB Switch model calling for subsequent use; Then
Described blade main frame, specifically for:
Determine the weights with every bar link of IB Switch model calling for subsequent use; From described first link switching to the link of the maximum weight with described IB Switch model calling for subsequent use, described blade main frame is enable to use the link transmission data with the maximum weight of described IB Switch model calling for subsequent use.
9. the system as described in as arbitrary in claim 6 ~ 8, it is characterized in that, described system also comprises:
Subnet manager SM, for detecting the node in described IB subnet by sending subnet detection packet to described IB subnet, and generates the network topology structure of described IB subnet according to result of detection.
10. the system as described in as arbitrary in claim 6 ~ 8, is characterized in that, each IB Switch cascade in described IB subnet, and for each IB Switch module in described blade main frame:
The link existed between each IB Switch in the subnet at current I B Switch module and described blade main frame place is bound into a virtual link.
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| CN104796276B (en) | 2018-11-23 |
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