CN102215123A - Multi-ring-network-topology-structure-based large-scale trunking system - Google Patents
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Abstract
The invention discloses a multi-ring-network-topology-structure-based large-scale trunking system. In the multi-ring-network-topology-structure-based large-scale trunking system, computing nodes are divided into a plurality of groups according to online time periods of the nodes, each group has a unique ring identifier, and the computing nodes in each group have a unique node identifier respectively; the computing nodes in each group are connected into a ring topology structure in a way of performing Hash operations on network addresses of the computing nodes in the group, taking key values obtained by the Hash operation as in-group node identifiers and clockwise arranging each computing node from lower node identifiers to greater node identifiers; an entire-ring node list of each ring is saved on a management node; and local-ring node lists are stored on each node in the ring, information about the nodes directly and indirectly adjacent to each node is saved, and each node periodically transmits own state messages to direct precursor nodes and direct successor nodes thereof. The system has higher stability, scalability and manageability.
Description
Technical field
The present invention relates to large-scale cluster system, relate in particular to a kind of large-scale cluster system, belong to the interleaving techniques application of information system and computer network based on the multi-ring networks topological structure.
Background technology
Large-scale cluster system is by being evenly distributed in calculation task on the resource pool that is made of the large-scale calculations node, makes the various application systems can be according to the transparent as required computing capability of obtaining high performance-price ratio, storage resources and information service.Large-scale data processing work such as information retrieval, data mining, business information processing and science calculating can have been carried on the large-scale cluster system platform.
Present group system is all emphasized good manageability, generally tends to adopt Centralized Topology, thereby ensures service quality.Promptly use one or several main control server to strengthen quantity set group server and constitute, main control server is responsible for the state of each node of monitoring, carries out failure detection and realizes load balancing etc.
Major defect based on the control and management mechanism of Centralized Topology is exactly that system exists bottleneck problem and Single Point of Faliure, so single-point needs high availability, recovers daily record or dual-host backup etc. as record, and advantage is that controllability is strong, easy to maintenance flexibly.
As seen, if in large-scale cluster system, adopt the strategy of concentrated controling management, computing node as the task executor needs initiatively regularly to send information to report the work at present state to management node, prevent the delay that node failure brings, this obviously is infeasible, because the huge computing node of quantity sends cycle information to management node and will bring a large amount of extra network service burdens, and a large amount of easily resources that consume management node, cause the effect that is similar to distributed denial of service attack.If adopt distributed controlling and managing mechanism,, then need a kind of network topology structure that is fit to large-scale cluster system efficiently to come the normal operation of support system to reduce the heartbeat message quantity that management node is received.
Summary of the invention
Technical problem to be solved by this invention is to overcome existing large-scale cluster system because the quantity of node is huge, the defective that the stability of system, scalability and manageability are difficult to ensure, a kind of large-scale cluster system based on the multi-ring networks topological structure is provided, can realizes the huge computing node of quantity is efficiently managed.
The present invention solves the problems of the technologies described above by the following technical solutions:
A kind of large-scale cluster system based on the multi-ring networks topological structure, described large-scale cluster system comprises management node
And computing node, described computing node is divided into a plurality of groups according to the online time period of node, and each group has a unique ring sign, and the computing node in each group has a unique node identifier; The computing node of each group is connected to a ring topology by the following method: the hash computing is carried out in the computing node network address in this group, the key value that obtains with the hash computing is as group interior nodes identifier, and by node identifier order from small to large each computing node is lined up along clockwise direction, thereby constitute ring topology; Preserve the loopful node listing of each ring on the management node.
Further, all store a local ring node listing on each node in the described ring, preserved with this node directly and the information of the node of indirect neighbor, comprising: the state that encircles identifier, forerunner and relative network distance, forerunner and the descendant node of node identification, forerunner and descendant node and this node of descendant node under the node; Each node regularly sends oneself state message to its direct precursor node and immediate successor node.
Node adds in accordance with the following methods:
When step 1, node adding network, at first send the message that a request adds network to management node, after management node receives that the node request adds message, calculate or verify the sign of node, and return to digital certificate of this node and receiveing the response, comprised the information of direct precursor node and immediate successor node in the ring in receiveing the response;
After step 2, node are received and are receiveed the response, get in touch with direct precursor node and immediate successor node in receiveing the response, and come the local ring node listing of this node of initialization by the local ring node listing of direct precursor node in receiveing the response and immediate successor node;
Step 3, the direct precursor node in receiveing the response and immediate successor node are after the node updates solicited message that obtains this node, also upgrade local ring node listing separately, the direct precursor node is notified the local ring node listing of its direct precursor node updates oneself, and the immediate successor node is notified the local ring node listing of its immediate successor node updates oneself.
Node withdraws from accordance with the following methods:
The situation that node initiatively withdraws from:
Withdraw from node and at first send information, require to nullify its log-on message to management node; Notify his forerunner's node and descendant node then, withdraw from this network; When forerunner's node and descendant node know notified after, upgrade respectively in the local ring node listing separately and withdraw from the relevant data of node with this, management node also upgrades the loopful node listing;
The passive situation about withdrawing from of node:
As improper passive the exitting network of node, its direct precursor node and descendant node do not receive the state information that this node should regularly be sent, and then direct precursor node and descendant node report this node improper passive exitting network to management node; To this node photos and sending messages,, confirm that then this node exits network after management node is received and reported, and respond confirmation to the direct precursor node and the descendant node of this node if can not get this node feedack at the appointed time; The direct precursor node of this node and descendant node upgrade local ring node listing separately, and management node upgrades the loopful node listing, and network topology is rebuild.
The present invention has following beneficial effect:
(1) system has realized load balancing, and computing node reduces to the amount of information of the online situation of report that management node sends,
Alleviated the load of management node;
(2) system has stronger scalability, promptly both can support the small scale network system, also can support large-scale cluster system;
(3) the multi-ring networks topological structure of the present invention's proposition both had been applicable to sparse node failure, was applicable to that also continuous nodes lost efficacy.
Description of drawings
Fig. 1 is the structural representation of a ring topology of large-scale cluster system of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Large-scale cluster system of the present invention comprises management node and computing node, described large-scale cluster system comprises management node and computing node, described computing node is divided into a plurality of groups according to the online time period of node, each group has a unique ring sign, and the computing node in each group has a unique node identifier; The computing node of each group is connected to a ring topology by the following method: the hash computing is carried out in the computing node network address in this group, the key value that obtains with the hash computing is as group interior nodes identifier, and by node identifier order from small to large each computing node is lined up along clockwise direction, thereby constitute ring topology; Preserve the loopful node listing of each ring on the management node.
A unique ring sign is at first created for each ring by system
, the ring sign has indicated the type of ring, and determines it is which ring; In each ring, create unique node identifier in the ring for each node again
Therefore in fact each node identifier is made up of two parts:
The hash computing is carried out in the network address that ring interior nodes identifier adopts hashing algorithm will be included into the node of specific ring, and the key value that computing obtains based on hash is lined up node in the direction of the clock from small to large, thus constituting an identifier space is 0 ~
The ring topology of (m is the figure place of node label), promptly maximum open ended node numbers are in the ring
Individual.In the interval of regulation, be the node of k for ring interior nodes identifier, clockwise line node is called the descendant node of node k in the ring; Counterclockwise line node is called forerunner's node of k.Obviously for the node in the ring, need to understand as far as possible in real time with it the direct precursor of supervision and the situation of descendant node mutually.
Yet, if node is only understood its current direct precursor and immediate successor node situation, if then when current direct precursor of node or immediate successor node failure, node can not be new with it rapidly direct precursor or immediate successor node set up the relation of supervision mutually, particularly in the initial ring during node failure continuously in blocks, this situation will be difficult to solve more.For this reason, the present invention solves this problem at each ring interior nodes deploy local ring node listing.In the large-scale cluster system of the present invention, on management node, preserve the loopful node listing of each ring, all store a local ring node listing on each node in the ring, preserved with this node directly and the information of the node of indirect neighbor, comprising: the state that encircles identifier, forerunner and relative network distance, forerunner and the descendant node of node identification, forerunner and descendant node and this node of descendant node under the node; The node number is
Ring in, every local link point range table space complexity is
Each list item definition of local ring node listing is as shown in table 1:
Table 1
| Local ring node listing list item | Definition |
| NodeID | Node identifier |
| RingID | Ring identifier under the node |
| Distance | Relative network distance with present node |
| Place | Node relative position (forerunner/follow-up) |
| Status | Node state (available/unavailable/not online) |
List item Distance in the table 1 is meant the relative network distance with present node, direct precursor, descendant node are respectively " 1 " and " 1 " with the relative network distance of this node, and the indirect forerunner of first cis-position is respectively " 2 " and " 2 " with the relative network distance of descendant node (being the direct precursor node of direct precursor node or the immediate successor node of immediate successor node) and this node.
If the node label figure place gets 4, then comprised 16 nodes in the ring, so the local link point range tabular on the node 4 list items have been lifted.System presents state shown in Figure 1 after operation after a while.With node 4 in the ring is example, and its direct precursor node points to node 2, and descendant node points to node 6; In addition, the direct precursor node of node 2 and the immediate successor node of node 6 have also been comprised in the local ring node listing of node 4, purpose is to guarantee when the direct precursor of node 4 or descendant node inefficacy, can make things convenient for its rapidly and node 1 or node 10 get in touch, and upgrade the local ring node listing rapidly.
When a node joins corresponding ring, then need pass through the management node channeling conduct, and the local ring node listing that is about to adjacent node is upgraded.Node adds to be needed through three processes: node adds admission process, local ring node listing initialization procedure, upgrades other node local ring node listing process.With the node among Fig. 13 is example, and concrete steps are as follows:
Step is when 1. node 3 adds networks, at first send the message that a request adds network to management node, after management node receives that the node request adds message, calculate or verify the sign of node, and return to digital certificate of node and receiveing the response, comprised the information of direct precursor node (node 2) and immediate successor node (node 4) in the ring in receiveing the response;
Step 3. node 2,4 is also upgraded local ring node listing separately after the node updates solicited message that obtains node 3, and the local ring node listing of notifying node 1 and node 6 to upgrade separately respectively;
Step 4. node 3 respectively with node 2,4 regular send state information mutually, to allow the other side know own presence.
And when node exits network, being divided into two kinds of situations: the 1st kind of situation is that the normal active of this node exits network; Another kind of situation is improper passive the exitting network of node.If when node initiatively withdraws from the place ring, at first send information to management node, require to nullify its log-on message, notify his forerunner's node and descendant node then, withdraw from this network.When forerunner's node and descendant node know notified after, can upgrade respectively in the local ring node listing separately with the relevant data of this node, management node also can upgrade the loopful node listing.And when node because some are special, during passive withdrawing from, then need its preceding descendant node initiatively to upgrade the local ring node listing of self as network disconnection or mechanical disorder, to keep the stable of ring, concrete steps are as follows:
Step is established node 3 improper passive exitting network 1. as shown in Figure 1, and its direct precursor node (node 2) and descendant node (node 4) will not receive the information that node 3 should regularly be sent;
Step 3. management node receives that report back to node 3 photos and sending messages, if can not get node 3 feedacks at the appointed time, confirms that then node 3 has exitted network, responds confirmations to node 2 and node 4 then;
Step is node 2 and node 4 renewals local ring node listing separately 4., and management node upgrades the loopful node listing, and network topology is rebuild.
When the continuous nodes inefficacy takes place when, the system management node will receive incomplete failure node report (promptly reporting from 1 part of inefficacy of forerunner or descendant node), this moment, server normally sent the node of reporting with inquiry, if it lost efficacy, and the single report that receives before handling again.As shown in Figure 1, suppose that node 0,1,2 lost efficacy simultaneously, this moment, management node can receive node 15 about the report about the inefficacy of node 2 of the inefficacy report of node 0 and node 4.Because management node does not receive the inefficacy report of the descendant node 1 of node 0 about node 0, server meeting inquiry node 1 learns that node 1 had lost efficacy, and then the report of processing node 15 transmissions, determines that node 0 lost efficacy.Can confirm also that in like manner node 2 also lost efficacy.
Claims (4)
1. large-scale cluster system based on the multi-ring networks topological structure, described large-scale cluster system comprises management node and computing node, it is characterized in that, described computing node is divided into a plurality of groups according to the online time period of node, each group has a unique ring sign, and the computing node in each group has a unique node identifier; The computing node of each group is connected to a ring topology by the following method: the hash computing is carried out in the computing node network address in this group, the key value that obtains with the hash computing is as group interior nodes identifier, and by node identifier order from small to large each computing node is lined up along clockwise direction, thereby constitute ring topology; Preserve the loopful node listing of each ring on the management node.
2. according to claim 1 based on the large-scale cluster system of multi-ring networks topological structure, it is characterized in that, all store a local ring node listing on each node in the described ring, preserved with this node directly and the information of the node of indirect neighbor, comprising: the state that encircles identifier, forerunner and relative network distance, forerunner and the descendant node of node identification, forerunner and descendant node and this node of descendant node under the node; Each node regularly sends oneself state message to its direct precursor node and immediate successor node.
As described in the claim 2 based on the large-scale cluster system of multi-ring networks topological structure, it is characterized in that node adds in accordance with the following methods:
When step 1, node adding network, at first send the message that a request adds network to management node, after management node receives that the node request adds message, calculate or verify the sign of node, and return to digital certificate of this node and receiveing the response, comprised the information of direct precursor node and immediate successor node in the ring in receiveing the response;
After step 2, node are received and are receiveed the response, get in touch with direct precursor node and immediate successor node in receiveing the response, and come the local ring node listing of this node of initialization by the local ring node listing of direct precursor node in receiveing the response and immediate successor node;
Step 3, the direct precursor node in receiveing the response and immediate successor node are after the node updates solicited message that obtains this node, also upgrade local ring node listing separately, the direct precursor node is notified the local ring node listing of its direct precursor node updates oneself, and the immediate successor node is notified the local ring node listing of its immediate successor node updates oneself.
As described in the claim 2 based on the large-scale cluster system of multi-ring networks topological structure, it is characterized in that node withdraws from accordance with the following methods:
The situation that node initiatively withdraws from:
Withdraw from node and at first send information, require to nullify its log-on message to management node; Notify his forerunner's node and descendant node then, withdraw from this network; When forerunner's node and descendant node know notified after, upgrade respectively in the local ring node listing separately and withdraw from the relevant data of node with this, management node also upgrades the loopful node listing;
The passive situation about withdrawing from of node:
As improper passive the exitting network of node, its direct precursor node and descendant node do not receive the state information that this node should regularly be sent, and then direct precursor node and descendant node report this node improper passive exitting network to management node; To this node photos and sending messages,, confirm that then this node exits network after management node is received and reported, and respond confirmation to the direct precursor node and the descendant node of this node if can not get this node feedack at the appointed time; The direct precursor node of this node and descendant node upgrade local ring node listing separately, and management node upgrades the loopful node listing, and network topology is rebuild.
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