CN100479391C - Method for storing result of active testing distributed network - Google Patents
Method for storing result of active testing distributed network Download PDFInfo
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- CN100479391C CN100479391C CNB2003101047187A CN200310104718A CN100479391C CN 100479391 C CN100479391 C CN 100479391C CN B2003101047187 A CNB2003101047187 A CN B2003101047187A CN 200310104718 A CN200310104718 A CN 200310104718A CN 100479391 C CN100479391 C CN 100479391C
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Abstract
When testing probes distributed on network run, tree structure of storing testing result is built dynamically. Each leaf node of the structure corresponding to a performance index defines stored unitive attribute and method, which realizes result of performance index. Specific testing result is saved in sub node of leaf node refreshed dynamically. New appeared performance index can be stored by adding new leaf node to expand the tree storage structure. Using simple network management protocol SNMP completes Reading and setting tested result. The method reduces complexity and cost of testing system and increases reliability of testing probes. The invention is compatible to existed network management system, is applicable to testing and monitoring system of large scale, high speed network and able to be integrated to system based on SNMP seamlessly.
Description
Technical field
The present invention relates to computer network test and monitoring technique field.Particularly a kind of distributed network is the test result storage means initiatively, is a kind of network testing data storage means.
Background technology
Carrying increasing important application on the Internet, network configuration is also complicated day by day.Network test and monitoring are that whole network behavior characteristic is understood in depth, analyzed, and find the network performance bottleneck, optimize the important channel that Internet resources disposed, strengthened network management, promote network performance.Initiatively test is main means of network test, and test probe emulation customer service (agreement) initiatively sends detection packet to network nodes such as router or servers, by catching the response condition phase-split network performance of detection packet.In extensive express network test monitoring, need in network, dispose a large amount of test probes, work in coordination with and finish network test, and test result is sent to network management center carries out centralized Analysis.The transmission of test result and test configurations information often needs special communication protocol between test probe and the network management center work station, this just causes the difficulty of interoperability between the test macro, must develop special protocol conversion gateway, the test index of different probe could be delivered to network management workstation and manage concentratedly.Therefore, the storage means of test result is a key point of distributed active Design of Test System, and test macro extensibility, interoperability, the centralized analysis framework realization of distributed testing etc. are all had material impact.
At present Distributed Network Test System is mainly used based on the storage mode of file and is left in the probe test result is distributed, and test result is sent to network management center or network management center sends to test probe with configuration information by the self-defining agreement of special use.To different performance index and purpose machine, test probe is created different destination files.In the test run process, test probe writes file with the test result that obtains and carries out this locality storage; The mode that initiatively sends by network management center poll or test probe is delivered to network management center with test result file; After transmission finished, the test probe deletion was also rebuild destination file, result's storage of a beginning new round.This method need define special file structure and the special exchanges data communication protocol of design, with present great majority based on Simple Network Management Protocol (Simple NetworkManagement Protocol, SNMP) network management system can't the conversation test data, dispose difficulty and complexity with O﹠M thereby strengthen network management system; And the mode that adopts file storage requires the local storage of test probe, and test result writes and reads increases extra overhead, and influence is test performance and probe reliability initiatively; In addition, will expend a large amount of network bandwidths in the concentrated transmission short time of destination file makes network performance the short time degradation occur.Basic thought of the present invention is: during the test probe operation, set up an extendible tree data structure at memory headroom, it is corresponding with it that the different performance index is dynamically generated a leaf node, attribute and initialization such as its priority of unified Definition, storage authority, method such as reads, is provided with; For different tests, under the leaf node of corresponding index, generate a child node and store its test result.Network management center uses directly that the SNMP NMP of standard is searched, the read test result, and test configurations is set.The test result that the test result node can be stored once or sample for several times, follow-up test result can constantly refresh this node of covering and deposit the result.Set polling cycle by network management center, whether decision reads the test result after each node refreshes.The present invention has overcome the shortcoming of document storage mode at aspects such as opening, interoperability, performances, the unified Definition of leaf node attribute and method, make and to finish the SNMP NMP of searching and read the use standard of test result, reduce the system design complexity, and realization is compatible mutually with existing network management system.Data structure is present in memory headroom and need not hard disk, has reduced system cost, and has improved the reliability of system; The overhead of test result read-write also reduces the normal test run of unlikely influence greatly.After each sampling, network management center promptly can read the test result of storage under the leaf node, satisfies the real-time requirement of performance test fully.
Summary of the invention
A kind of distributed network is the test result storage means initiatively, when being distributed in everywhere test probe operation of network, dynamically sets up tree-like storage structure store test results in the internal memory of test probe; When the network performance index kind of probe monitoring increased, this tree-like storage structure was dynamically added the storage that new leaf node is supported newly-increased performance index data; Network management center finishes reading by the SNMP NMP of test result; The network performance index that probe is monitored is stored in the leaf node of tree-like storage structure of foundation, defined a root node, the initiatively test of its sign, leaf node defines corresponding various performance index under it, and the test result of every kind of index is stored among the corresponding node; For every kind of performance index, unified Definition its access right and identification number attribute, unified realized setting, read, initialization and triggering processing method.
Described distributed network is the test result storage means initiatively, for newly-increased performance index, the extended method of its tree-like storage structure is the access right and the identification number attribute of this index of definition, realize this index setting, read, initialization and triggering processing method; This index corresponding informance is added array AMRStruct finish expansion.
Distributed network is the test result storage means initiatively, comprising: the tree-like storage structure of tree-like storage structure constructive process, establishment.
The present invention is a kind of opening distributed network active efficiently test result storage means, mainly comprise: test result tree-like storage structure, the definition of performance index attribute and method in the tree-like storage structure, the extended method design of structure and the visit of snmp protocol.Particular content is described below:
(1) dtd of tree-like storage structurally associated
For setting up the tree-like storage structure of test result, defined some data types, the primary structure definition is as follows with the c language description:
Be used to preserve the node structure definition of test result under the // leaf node;
typedef?struct_NODEVALUE
{
Int taskid; The task number that // test the overall situation is unique
Int refcnt; // quote this node number of times
Struct timeval lastaccess; // last the access time
Void* value; The memory location of // test result
Struct_NODEVALUE * next; // next similar test result
}TNodeValue；
The leaf node organization definition of // tree-like storage structure;
typedef?struct_TREENODE
{
OID subid; The identification number of // test index
ENodeProperty property; // node character (intermediate node or leaf node)
ENodePriority priority; // access right
Char identity[MAXOID_LEN]; The identification number of // node
Char label[MAXLABEL_LEN]; The identification name of // node
Char description[MAXDESC_LEN]; The description of // node
Struct_TREENODE * firstchild; First child nodes of // node
Struct_TREENODE * neighbor; The neighbor node of // node
Struct_TREENODE * parent; Father's node of // node
struct_TREENODE *link；//
Int (* get) (void*, void*); // read the function of node
Char * (* response) (void); The response function of // node to reading
Void (* trap) (void); The condition of // node triggers handles function
Void (* release) (void); The resource of // node discharges function
Int (* set) (void*, void*, void*, unsigned int); // joint
Point function is set
Int (* init) (void*); The initialization function of // node
Int (* config) (void*, FILE*); The configuration function of // node
Sem_t sem; The semaphore of // latch node
TNodeValue* listhdr; The linked list head as a result of the concrete test of // node
TNodeValue* listtail; The tail of chained list as a result of the concrete test of // node
}TreeNode；
The organization definition of required attribute of // storage creation tree-like storage structure and method
typedef?struct_AMRSTRUCT
{
Int infotype; // information type
Int command; // specific instructions
Int minicode; // subcommand
Char label[MAXLABEL_LEN]; // node identification
Char description[MAXDESC_LEN]; // node is described
ENodeProperty property; // node character (intermediate node or leaf node)
ENodePriority priority; // access right
GetMethod * getmethod; // node the function that reads
ResMethod * resmethod; The response function of // node to reading
TrapMethod * trapmethod; The condition of // node triggers handles function
RelMethod * relmethod; The resource of // node discharges function
SetMethod * setmethod; // node function is set
InitMethod * initmethod; The initialization function of // node
ConfigMethod * configmethod; The configuration function of // node
Char oid[MAXSUB_LEN]; // node identification number
}TAMRStruct；
(2) establishment of tree-like storage structure
When test machine brings into operation, call the tree-like storage structure that load_root_amr () function and load_prob_amr () function creation are used for store test results.The root node of load_root_amr () function creation tree-like storage structure, load_prob_amr () function are created one and are initiatively tested child node under root node, this node is created the leaf node corresponding with various performance index down.To under the leaf node corresponding, the generation child node be used for store test results during concrete test run with its institute's index of surveying.
To use the static array AMRStruc[of an above-mentioned TAMRStruct type when creating] corresponding to the leaf node of performance index, this array is corresponding with the index that can test of system, and an array element is comprising an attribute and the method information that the performance index leaf node is required of creating.As: { DOWNCNTL, DOWNLOADTASK, TRACEROUTE, " traceroute ", " This node contains the trace route measurement n ", LEAF, RW, getTraceRT, NULL, NULL, NULL, setTraceRT, NULL, NULL, " 0.2 " } just stipulated to set up the title of this index leaf node of route, access function, information such as position.Each performance index has all defined an array element, and this array is at last with element { 1 ,-1 ,-1, " ", " ", MODULE, NOACCESS, NULL, NULL, NULL, NULL, NULL, NULL, NULL, " " } ending, and the expression definition finishes.Here only define title and a common interface of each power function, also needed to realize in addition each power function.
(3) expansion of tree-like storage structure
When new performance index occur, need expansion tree-like storage structure.In the tree-like storage structure, increase new node and finish by increasing respective item at static array AMRStruct, a newly-increased Object node the information that must provide comprise:
Node task attribute code comprises information type infotype, order command and subcommand code minicode.These three mappings that are used between task scheduling and Executive Module and the memory management module when mutual.
Nodal community property attribute has 2 kinds: intermediate node (MODULE) and leaf node (LEAF).No matter be that definition intermediate node or leaf node all must guarantee that its father node defined before the definition of this node, otherwise may make mistakes.This definition order can be referring to defined node.
The operating right that nodal operation authority priority is different will influence control centre tree-like storage structure in the test machine will be carried out the initialization of object value, the operation that change is provided with, retrieves.
The function relevant with nodal operation has getmethod (the execution function when sending retrieval request), resmethod (response function), trapmethod is (when node occurs predefined when unusual, the action of being taked), relmethod is (when system withdraws from, this node the action that should carry out,), setmethod (executable operations is stored the operation of being carried out during change node configuration value to task action result), initmethod (default setting of node when the system that is provided with sets up for the first time), configmethod (system's required operation of carrying out when reading configuration file and carry out initialization mainly is that configuration file is analyzed).
Node identifier Oid is the unique identifier of object in structure.
Last column in the AMRStruct array is an end mark, can not revise, and the effective node definition of task must carry out before this end mark.
(4) based on the visit of snmp protocol
After startup, probe is No. 161 ports of monitoring itself, to catch the request getRequest as a result that reads that network management center sends.
A) storage of test result
The performed test result of test machine is to be stored in the node corresponding with its index.To at first set up storage function setXXX (XXX is the index name) to the storage of task action result.The setmethod of the corresponding tree-like storage structure objects of the static array of AMRStruct is composed the setXXX value.So that when the storage execution result, call automatically.
After test execution is finished, call loadResults and carry out data storage procedure setXXX function calls.Preceding 3 parameters of loadResults are corresponding to the infotype of TAMRStruct structure, command, and the minicode value, the test that is used for carrying out is associated with want storage object node.
Owing to will store a plurality of different tests under the index node, therefore the storage execution result of this node is to utilize the next field of TNodeValue to organize with the form of chained list, at last head and the tail that points to chained list respectively with listhdr and listtail two fields of TreeNode.Therefore each different storing value carries out index with Test No., when the execution result of new Test No. need be stored, it is hung over the afterbody of result queue, if the Test No. task action result store, as long as then cover.The structure that is used to store dissimilar test execution results is different, and the value field among the TNodeValue is the void* type.In the time will carrying out result's retrieval, organize bag respectively to dissimilar results and handle.
B) test result reads
Reading by the SNMP NMP of test result finished, and storage organization provides the interface for the snmp protocol visit.Test execution all is stored in test result among the TNodeValue of corresponding tree-like storage structure TreeNode in the value field.Even execution error may appear in test, also the possible cause that mistake is occurred is stored as results of task execution, so that control centre can retrieve the test execution mistake.
When network management center read in the result to test execution, the execution result that must indicate which test read, and this can be undertaken by unique Test No..Use getRequest to come request results, request is No. 161 ports that send to probe on udp protocol with the snmp protocol encapsulation, has guaranteed the compatibility of system like this.In the test probe as a result memory management module after receiving as a result solicited message, at first message is carried out security verification, non-safe message will directly abandon.And effective message is therefrom taken out the OID that result object is desired to read by control centre, is index search tree-like storage structure with this OID.
When the object that is retrieved exists in structure, (method is realized by the getXXX function of definition then to call the get method of this Object node, and its mapping relations are determined by static array AMRStruct in the structure constructive process), the getXXX method is mainly used in forms unified string format with dissimilar results, calls the request response that the genResponse process is carried out getRequest at last.
Description of drawings
Accompanying drawing 1 is a tree-like storage structure creation procedure flow chart.
The tree-like storage structural representation of accompanying drawing 2 for creating.
Accompanying drawing 3 is the Stored Procedure figure of test result.
Accompanying drawing 4 is for using snmp protocol read test result's flow chart.
The concrete steps of tree-like storage Structure Creating program flow diagram (accompanying drawing 1) are described as follows:
The S1 probe starts, and preparation creates the tree-like storage structure;
S2 judges whether root node exists; Be no execution S3, for being carries out S10;
S3 creates a memory node;
S4 gives the attribute assignment of node, is set to root node;
S5 reads in an AMRStruct array element;
S6 judges whether this element is last element of array; For no execution S7, for being holds Row S10;
S7 creates a memory node;
S8 gives this nodal community assignment according to the array element that reads in;
The S9 new node is added to the leaf node under the root node; Jump to S5;
S10 tree-like storage Structure Creating is finished.
The explanation of tree-like storage structural representation (accompanying drawing 2):
Accompanying drawing 2 is depicted as the test result tree-like storage structure that probe creates, and AMRroot is the root joint Point has several leaf nodes; A leaf node correspondence a kind of performance indications, as being communicated with Property, time delay, packet loss etc.; The test result of the concrete test assignment of certain index is according to its survey Examination number is kept in the result store formation of corresponding leaf node. The concrete steps of test result Stored Procedure figure (accompanying drawing 3) are described as follows:
The test assignment of S11 performance indications produces test result, locking tree-like storage structure, standard Standby storage;
S12 searches tree-shaped storage organization according to the index sequence number;
S13 has judged whether to find the leaf node of this index sequence number; For being carries out S14, be no Carry out S19;
S14 number searches task queue according to test assignment under this leaf node;
S15 judges whether to exist the test result node corresponding with task number; Be no execution S16, For being carries out S18;
S16 creates new result store node according to task number and index;
S17 adds result store formation under this leaf node with newly-built node;
S18 is kept at this result store node with test result; Jump to S20;
S19 return results storage errors information;
The release of S20 tree-like storage structure finishes result store.
The concrete steps that test result reads flow chart (accompanying drawing 4) are described as follows:
The S21 probe is monitored COM1;
S22 receives the SNMP GET Request request to test result, locking tree-like storage knot Structure;
S23 does the validity authentication to request message; Carry out if yes S24, if NO carry out S28;
S24 searches tree-shaped storage organization according to performance indications and the task number of request message indication;
S25 judges whether to find corresponding result store node, for being carries out S26, otherwise carries out S28;
S26 reads test result from this node;
S27 is packaged in test result in the SNMP GET Response message and turns back to webmaster The center;
The release of S28 tree-like storage structure, return results read error information finishes the result and reads; Jump to S21.
Embodiment
The present invention can be applicable to the test monitor system of extensive express network as a kind of general distributed active test result storage mode, and can seamlessly be integrated in the network management system based on SNMP.During concrete enforcement, in the internal memory of test probe, set up the root node of tree-like storage structure of result's storage and the leaf node of corresponding each performance index.Network management center disposes after certain initiatively tests to test probe, and when test began to carry out, probe will be in the tree-like storage structure increases a test result under the leaf of correspondence according to surveys index and stores child node.Initiatively the test result of a test period of test is kept in this node, and the result of each test period understands the test result of a preceding test period of storing in the overlay node.And when EOT, test probe will be deleted this result and store child node in the tree-like storage structure, discharge shared resource.Network management center is by being provided with the test result that the test result polling cycle can determine whether to read each test period.When network management center reads as a result, number be index, send polling request to test probe in SNMP getRequest mode with overall unique test assignment of distributing to initiatively test; After test probe is received polling request, therefrom decomposite test assignment number, with the result who in the tree-like storage structure, takes out corresponding test, in SNMP getResponse mode polling request is responded.The expansion of tree-like storage structure only need define attribute and the method that realizes performance index, and test probe can generate the leaf node of corresponding new performance index automatically in the tree-like storage structure.
Claims (3)
1. distributed network test result storage means initiatively is characterized in that: when being distributed in everywhere test probe operation of network, dynamically set up tree-like storage structure store test results in the internal memory of test probe; When the network performance index kind of probe monitoring increased, this tree-like storage structure was dynamically added the storage that new leaf node is supported newly-increased performance index data; Network management center finishes reading by the SNMP NMP of test result; The network performance index that probe is monitored is stored in the leaf node of tree-like storage structure of foundation, defined a root node, the initiatively test of its sign, leaf node defines corresponding various performance index under it, and the test result of every kind of index is stored among the corresponding node; For every kind of performance index, unified Definition its access right and identification number attribute, unified realized setting, read, initialization and triggering processing method.
2. distributed network according to claim 1 is the test result storage means initiatively, it is characterized in that, for newly-increased performance index, the extended method of its tree-like storage structure is the access right and the identification number attribute of this index of definition, realize this index setting, read, initialization and triggering processing method; This index corresponding informance is added array AMRStruct finish expansion.
3. distributed network according to claim 1 is the test result storage means initiatively, it is characterized in that,
In the internal memory of test probe, set up the root node of tree-like storage structure of result storage and the leaf node of corresponding each performance index, network management center disposes after certain initiatively tests to test probe, when test begins to carry out, probe is according to increasing a test result storage child node under will be in the tree-like storage structure corresponding leaf node of survey index, initiatively the test result of a test period of test is kept in this test result storage child node, the result of each test period understands the test result of a preceding test period of storing in the overlay node, and when EOT, test probe will be deleted this test result storage child node in the tree-like storage structure, discharge shared resource, whether network management center reads the test result of each test period by the decision of test result polling cycle is set, when network management center reads as a result, with overall unique test assignment of distributing to initiatively test number is index, sends polling request in SNMP getRequest mode to test probe; After test probe is received polling request, therefrom decomposite test assignment number, with the result who in the tree-like storage structure, takes out corresponding test, in SNMP getResponse mode polling request is responded, the expansion of tree-like storage structure only need define attribute and the method that realizes performance index, and test probe generates the leaf node of corresponding new performance index automatically in the tree-like storage structure.
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| CN1633111B (en) * | 2005-01-14 | 2010-04-28 | 中国科学院计算技术研究所 | High-speed network traffic flow classification method |
| KR100747466B1 (en) * | 2005-10-01 | 2007-08-09 | 엘지전자 주식회사 | A device management client and device management method using nodes having additional properties |
| CN103166942B (en) * | 2011-12-19 | 2016-08-03 | 中国科学院软件研究所 | A kind of procotol analytic method of malicious code |
| US9338095B2 (en) | 2012-05-01 | 2016-05-10 | F5 Networks, Inc. | Data flow segment optimized for hot flows |
| CN104283707A (en) * | 2013-07-08 | 2015-01-14 | 株式会社日立制作所 | Device and method for monitoring multistage tree structure system in real time |
| CN108123935B (en) * | 2017-12-06 | 2022-06-03 | 佛山华平勇创能源科技有限公司 | Circuit board testing method and device, storage medium and terminal |
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| CN1264079A (en) * | 1999-01-14 | 2000-08-23 | 日本电气株式会社 | Network fault management system for display fault node with tree-shape structure |
| CN1394040A (en) * | 2001-06-22 | 2003-01-29 | 友讯科技股份有限公司 | Management system and manager for society's Ethernet switch |
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| CN1264079A (en) * | 1999-01-14 | 2000-08-23 | 日本电气株式会社 | Network fault management system for display fault node with tree-shape structure |
| CN1394040A (en) * | 2001-06-22 | 2003-01-29 | 友讯科技股份有限公司 | Management system and manager for society's Ethernet switch |
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