CN104778197B - A kind of data search method and device - Google Patents
A kind of data search method and device Download PDFInfo
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- CN104778197B CN104778197B CN201410843148.1A CN201410843148A CN104778197B CN 104778197 B CN104778197 B CN 104778197B CN 201410843148 A CN201410843148 A CN 201410843148A CN 104778197 B CN104778197 B CN 104778197B
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Abstract
The invention discloses a kind of data search method and devices, and wherein method includes: and obtains to search data packet；The lookup data packet is searched in advance according to pre- search key, to obtain pre- lookup data packet；The pre- lookup data packet is sent to external searching equipment to search.Method and device provided in an embodiment of the present invention is searched in advance by programmable logic device data packet is searched, the a part for having shared external searching equipment searches affairs, on the basis of not needing to change original external searching device hardware, the bandwidth and efficiency for improving data query, improve the performance of key word of the inquiry.
Description
Technical field
The present invention relates to data parsing field more particularly to a kind of data search methods and device.
Background technique
With the rapid development of internet industry, the data analysis requirements based on all trades and professions are more and more, for network
The performance that data packet obtains analysis product is more and more harsher, also higher and higher for the index request of resolution system.And this kind of system
The corn module of system is exactly that keyword is searched.
The lookup method of data packet keyword in the prior art, if mainly being searched by external searching equipment.Fig. 1
It is the logical construction schematic diagram for the data query method that the prior art provides, as shown in Figure 1, data source flows through programmable logic device
Part, programmable logic device parse data source, and send external searching equipment for the data after parsing, are looked by outside
Equipment is looked for search the keyword in data.
Above-mentioned data search method has the disadvantage that the data bandwidth of external searching equipment is limited, once data packet
Queries is more than the bandwidth traffic of query facility, it is necessary to replace the fixed function chip in external inquiry equipment or directly replacement
External inquiry equipment, this requires to be modified hardware and design, and substantially increases the cost of data query, this scheme is not
Suitable system upgrading and maintenance；Under normal circumstances, the inquiry bandwidth of external equipment is bigger, and the cost of the query facility used is got over
Height, the performance and cost of key word of the inquiry are directly proportional, to improve the bandwidth of data query, must just increase external equipment cost
Investment.
Summary of the invention
The present invention is completed to solve in the prior art above-mentioned insufficient, and it is an object of the invention to propose one kind
Data search method and device, this method and device improve the efficiency of data query, reduce the cost of data query.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the embodiment of the invention provides a kind of data search methods, comprising:
It obtains and searches data packet；
The lookup data packet is searched in advance according to pre- search key, to obtain pre- lookup data packet；
The pre- lookup data packet is sent to external searching equipment to search.
Further, described that the lookup data packet is searched in advance according to pre- search key, to obtain pre- search
Data packet specifically includes:
Pre- search key bit wide and pre- search key content are initialized；
Pre- search key content after pre- search key bit wide and initialization after initialization is configured；
According to the pre- search key bit wide that postpones and with the pre- search key content postponed to the lookup data
Packet is searched in advance, to obtain pre- lookup data packet.
Further, the basis matches the pre- search key bit wide postponed and with the pre- search key content pair postponed
The lookup data packet is searched in advance, is specifically included with obtaining pre- data packet of searching:
The lookup data packet is split into at least one sub- lookup with the pre- search key bit wide postponed according to described
Data packet；
Hash operation is carried out to the sub- lookup data packet, to obtain corresponding address ram；
The sub- lookup data packet is searched according to the address ram, if at least one described sub- lookup data
The content of packet with it is described consistent with the pre- search key content postponed, then the lookup data packet is determined as pre- lookup data
Packet.
Further, described that the sub- lookup data packet search through dual port RAM progress according to the address ram
It searches.
Further, the sub- lookup data packet is searched according to the address ram, if the sub- lookup data
The content of packet with it is described inconsistent with the pre- search key content postponed, then by the lookup data packet delete.
On the other hand, the present invention provides embodiment and additionally provides a kind of data search device, comprising:
Module is obtained, searches data packet for obtaining；
Pre- searching module is looked into for being searched in advance according to pre- search key the lookup data packet with obtaining in advance
Look for data packet；
Searching module is searched for the pre- lookup data packet to be sent to external searching equipment.
Further, the pre- searching module includes:
Initialization unit, for being initialized to pre- search key bit wide and pre- search key content；
Configuration unit, for the pre- search key content after the pre- search key bit wide and initialization after initialization
It is configured；
Pre- searching unit, for according to the pre- search key bit wide postponed and with the pre- search key content postponed
The lookup data packet is searched in advance, to obtain pre- lookup data packet.
Further, the pre- searching unit specifically includes:
Subelement is split, for splitting into the lookup data packet at least according to the pre- search key bit wide postponed
One son searches data packet；
Operation subelement, for carrying out Hash operation to the sub- lookup data packet, with obtaining corresponding RAM
Location；
Determine subelement, for being searched according to the address ram the sub- lookup data packet, if at least one
The content of the sub- lookup data packet with it is described consistent with the pre- search key content postponed, then it is the lookup data packet is true
It is set to pre- lookup data packet.
Further, described that the sub- lookup data packet search through dual port RAM progress according to the address ram
It searches.
Further, the determining subelement further comprises:
It deletes and removes subelement, for being searched according to the address ram the sub- lookup data packet, if the son
The content of data packet and described inconsistent with the pre- search key content postponed is searched, then by lookup data packet deletion.
The embodiment of the present invention searches data packet to be found by programmable logic device in advance, searches first pre-
Keyword bit wide and pre- search key content are initialized, then crucial to the pre- search key bit wide and pre- lookup
Word content carry out dynamic configuration, finally according to after dynamic configuration pre- search key bit wide and pre- search key content treat
Data packet is searched to be searched in advance, with obtain it is pre- search data packet, will pre- lookup data packet be sent in external searching equipment into
One step is searched, and a part that external lookup equipment has been shared by the pre- lookup of programmable logic device searches affairs,
On the basis of not needing to change original external searching device hardware, the bandwidth and efficiency of data query are improved, improves and looks into
Ask the performance of keyword.
Detailed description of the invention
In order to more clearly illustrate the technical scheme of the exemplary embodiment of the present invention, below to required in description embodiment
The attached drawing to be used does a simple introduction.Obviously, the attached drawing introduced is present invention a part of the embodiment to be described
Attached drawing, rather than whole attached drawings without creative efforts, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the logical construction schematic diagram for the data query method that the prior art provides.
Fig. 2 is the flow diagram for the data search method that the embodiment of the present invention one provides.
Fig. 3 is the flow diagram of data search method provided by Embodiment 2 of the present invention.
Fig. 4 is the data packet input timing schematic diagram of data search method provided by Embodiment 2 of the present invention.
Fig. 5 is the operation logic schematic diagram of data search method provided by Embodiment 2 of the present invention.
Fig. 6 is the logical construction schematic diagram for the data search device that the embodiment of the present invention three provides.
Fig. 7 is the structural schematic diagram for the data search device that the embodiment of the present invention three provides.
Fig. 8 is the structural schematic diagram for the data search device that the embodiment of the present invention four provides.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below with reference to attached in the embodiment of the present invention
Figure, by specific embodiment, is fully described by technical solution of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments, based on the embodiment of the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under the premise of creative work out, falls within the scope of protection of the present invention.
Embodiment one:
Fig. 2 gives the flow diagram of the data search method of the offer of the embodiment of the present invention one.The method of the present embodiment
It can be executed by data search device, which can realize that can generally be integrated in can compile by way of hardware and/or software
In journey logical device.
As shown in Fig. 2, the data search method that the present embodiment one provides includes following operation:
S110 is obtained and is searched data packet；
The present embodiment will search data packet input, programmable logic device pair by the input interface of programmable logic device
The lookup data packet is parsed.
S120 searches the lookup data packet according to pre- search key in advance, to obtain pre- lookup data packet；
Get parsing after lookup data packet after, by the lookup data packet be sent to external searching equipment it
Before, it is searched in advance according to pre- search key data packet is searched, to obtain pre- lookup data packet.In a specific example
In, the keyword that requires to look up be the data of 8 bytes such as " abcd1234567 ... ", pre- search key can be set as
" abcd " searches the lookup data packet of input in advance, finds out the lookup data packet comprising " abcd ", and will search data packet
It is determined as pre- lookup data packet.It should be noted that pre- search key width can weigh the specific of programmable logic device
Using with remaining logical resource, and search the quantity of data packet and set.
The pre- lookup data packet is sent to external searching equipment and searched by S130.
By S120 by search data packet carry out it is pre- search pre- lookup data packet has been determined after, by the pre- lookup number
External searching equipment is sent to according to packet to be further searched for.Wherein, the external searching equipment can be three-state content addressing
Memory (ternary content addressable memory, TCAM), memory, system interface.
The present embodiment has been shared external searching and has been set by being searched in advance lookup data packet in the programmable logic device
Standby a part searches affairs, and the band of input data packet can be made to be wider than the limiting value that peripheral hardware searches bandwidth, do not changed
In the case where hardware design, the inquiry bandwidth of data searching system is improved, while also reducing the cost of data query.
Embodiment two:
Fig. 3 gives the flow diagram of data search method provided by Embodiment 2 of the present invention.The method of the present embodiment
It can be executed by data search device, which can realize that can generally be integrated in can compile by way of hardware and/or software
In journey logical device.The present embodiment optimizes S120 based on embodiment one.
As shown in figure 3, the data search method that the present embodiment two provides includes following operation:
S210 is obtained and is searched data packet；
In the operation, data packet to be found is inputted by the input interface of programmable logic device, and according to continuous
Complete data packet inputted.The data packet input timing that Fig. 4 gives the data search method of the offer of the present embodiment two shows
It is intended to.As shown in figure 4, clk is clock signal, valid is data valid signal, and sop is that data input commencing signal, and eop is
Data end of input signal, Data are the data information of input, and mty is the identification information of data significant bit.In the present embodiment
Data packet inputted according to data format shown in Fig. 4, therefore no matter data packet input before be which kind of data format, all
The corresponding data format can be converted to be inputted, the range and scalability of data search are improved.
S220 initializes pre- search key bit wide and pre- search key content；
In the operation, bit wide, that is, pre- search key width of pre- search key, for example, pre- search key is 2
A byte, then the bit wide of the keyword is 16.
S230 matches the pre- search key content after the pre- search key bit wide and initialization after initialization
It sets；
Specifically, initial come dynamic configuration according to the available resources of programmable logic device and the data packet for searching data packet
The content of the bit wide of pre- search key after change and the pre- search key after initialization, can pass through programmable logic device
The reserved register of external control interface configuration, to realize the configuration to pretreatment keyword bit wide；It is closed completing pre- search
Wide the matching of key word bit postpones, and configures to pretreatment keyword content, passes through the external of connection programmable logic device and controls
Interface can carry out dynamic configuration to the pre- search key content after initialization, for example, the initial pre- lookup of data packet is crucial
Word content is " 0xAAAA ", changes it to " 0xBBBB ".
The lookup data packet is split at least one son with the pre- search key bit wide postponed according to described by S240
Search data packet；
The lookup data packet is split at least one sub- lookup number identical with pre- search key bit wide by the operation
According to packet.
S250 carries out Hash operation to the sub- lookup data packet, to obtain corresponding address ram；
The operation searches data packet progress Hash operation to the son obtained is split, and the sub- lookup data packet is converted to phase
Corresponding address ram is searched so as to subsequent.
S260 searches the sub- lookup data packet according to the address ram, if at least one described sub- lookup
The content of data packet with it is described consistent with the pre- search key content postponed, then the lookup data packet is determined as pre- lookup
Data packet；
Specifically, after the sub- lookup data packet is carried out the Hash operation its corresponding address ram of acquisition by S250,
Address ram is read by dual port RAM, and the content of the sub- lookup data packet is compared with pre- search key content, if
The content of at least one sub- lookup data packet is identical as pre- search key content, then the lookup data packet is confirmed as pre- look into
Look for data packet, it is subsequent pre- will search data and transfer to external searching equipment further searched.
In addition, the present embodiment further includes, the sub- lookup data packet is searched according to the address ram, if institute
State the content of sub- lookup data packet with it is described inconsistent with the pre- search key content postponed, then the lookup data packet is deleted
It removes.
The pre- lookup data packet is sent to external searching equipment and searched by S270.
Fig. 5 gives the operation logic schematic diagram of data search method provided in this embodiment.As shown in figure 5, this implementation
The content of bit wide and pretreatment keyword of the data query method that example provides first to pretreatment keyword carries out initialization and matches
It sets, wherein the configuration of pretreatment keyword bit wide is by the control interface of programmable logic device to reserved register configuration
To realize；The configuration for pre-processing keyword content realized by the way that pretreatment keyword content is written to programmable logic device,
Pretreatment keyword content is subjected to Hash operation, obtains corresponding pre- search key address ram, such as figure label 1. institute
Show, the pre- search key address ram is written as 1；Then the data packet of input is split according to pretreatment keyword bit wide
At at least one sub- lookup data packet, Hash operation is carried out respectively at least one described sub- lookup data packet, it is corresponding to obtain
Son search data packet address ram, as figure label 2. shown in, the dual port RAM reading sub- lookup data packet address ram, and
The content of the sub- lookup data packet is compared with pre- search key content, as figure label 3. shown in, if described
The content that son searches data packet is identical as pre- search key content, then otherwise it is 0 that the output result of the dual port RAM, which is 1, and
Will output result be input to pre- lookup result judgment module, as figure label 4. shown in, at least one sub- lookup data packet pair
The output result for the dual port RAM answered is judged, if at least one output result is 1, which is determined
To search data packet in advance, and pre- lookup data packet is transferred into external searching equipment and is further searched for, if all lookups
As a result all it is 0, then illustrates that the lookup data packet is not hit, which is deleted.
Data search method provided in this embodiment looks into data packet to be found by programmable logic device in advance
It looks for, pre- search key bit wide and pre- search key content is initialized first, then to the pre- search key
Bit wide and pre- search key content carry out dynamic configuration, finally look into according to the pre- search key bit wide after dynamic configuration and in advance
It looks for keyword content to search data packet to be found in advance, to obtain pre- lookup data packet, sends pre- data packet of searching to
Further progress is searched in external searching equipment, and external lookup equipment has been shared by the pre- lookup of programmable logic device
A part searches affairs and improves the bandwidth of data query on the basis of not needing to change original external searching device hardware
And efficiency, improve the performance of key word of the inquiry.
Embodiment three:
Fig. 6 gives the logical construction schematic diagram of the data search device of the offer of the embodiment of the present invention three.As shown in fig. 6,
Data search device provided in an embodiment of the present invention is integrated in programmable logic device, to the lookup number after data parse
According to packet, the lookup data packet after being is searched in advance according to data search device, to obtain pre- lookup data packet, and will be pre-
Lookup data packet is sent to external searching equipment and is further searched for.
Fig. 7 gives the structural schematic diagram of the data search device of the offer of the embodiment of the present invention three.As shown in fig. 7, this reality
The data search device for applying example offer includes with flowering structure:
Module 101 is obtained, searches data packet for obtaining；
Pre- searching module 102, it is pre- to obtain for being searched in advance according to pre- search key the lookup data packet
Search data packet；
Searching module 103 is searched for the pre- lookup data packet to be sent to external searching equipment.
One that the embodiment of the present invention one provides can be performed in a kind of processing unit of operation/maintenance data provided in an embodiment of the present invention
Kind data search method, has the corresponding functional module of execution method and beneficial effect.
Example IV:
Fig. 8 gives the structural schematic diagram of the data search device of the offer of the embodiment of the present invention four.The present embodiment is to implement
Based on example three, pre- searching module is optimized, as shown in figure 8, data search device provided in this embodiment includes following
Structure:
Module 201 is obtained, searches data packet for obtaining；
Pre- searching module 202, it is pre- to obtain for being searched in advance according to pre- search key the lookup data packet
Search data packet；
Searching module 203 is searched for the pre- lookup data packet to be sent to external searching equipment.
Further, pre- searching module 202 includes:
Initialization unit 2021, for being initialized to pre- search key bit wide and pre- search key content；
Configuration unit 2022, for the pre- search key after the pre- search key bit wide and initialization after initialization
Content is configured；
Pre- searching unit 2023, for according to the pre- search key bit wide postponed and with the pre- search key postponed
Content searches the lookup data packet in advance, to obtain pre- lookup data packet.
Further, pre- searching unit 2023 includes:
Subelement 20231 is split, for splitting the lookup data packet according to the pre- search key bit wide postponed
At at least one sub- lookup data packet；
Operation subelement 20232, it is corresponding to obtain for carrying out Hash operation to the sub- lookup data packet
Address ram；
Subelement 20233 is determined, for searching according to the address ram the sub- lookup data packet, if extremely
The content of a few sub- lookup data packet with it is described consistent with the pre- search key content postponed, then by the lookup number
It is determined as pre- lookup data packet according to packet.
Further, described that the sub- lookup data packet search through dual port RAM progress according to the address ram
It searches.
Further, the determining subelement 20233 further comprises:
It deletes and removes subelement, for being searched according to the address ram the sub- lookup data packet, if the son
The content of data packet and described inconsistent with the pre- search key content postponed is searched, then by lookup data packet deletion.
A kind of data provided by Embodiment 2 of the present invention can be performed in a kind of data search device provided in an embodiment of the present invention
Lookup method has the corresponding functional module of execution method and beneficial effect.
The technical principle that above are only presently preferred embodiments of the present invention and used.The present invention is not limited to spies described here
Determine embodiment, various significant changes, readjustment and the substitution being able to carry out for a person skilled in the art are not departing from
Protection scope of the present invention.Therefore, although the present invention has been described in more detail through the above examples, this hair
It is bright to be not limited only to above embodiments, it can also include other more equivalence enforcements without departing from the inventive concept
Example, and the scope of the present invention is determined by the scope of the claims.
Claims (8)
1. a kind of data search method characterized by comprising
It obtains and searches data packet；
The lookup data packet is searched in advance according to pre- search key, to obtain pre- lookup data packet；
Wherein, the lookup data packet is searched in advance according to pre- search key, to obtain pre- lookup data packet, comprising:
Pre- search key bit wide and pre- search key content are initialized；
Pre- search key content after pre- search key bit wide and initialization after initialization is configured；
Wherein, the register reserved by the external control interface configuration of programmable logic device, it is crucial to pretreatment to realize
The wide configuration of word bit；It completes to postpone matching for pre- search key bit wide, is passing through the external of connection programmable logic device and control
Interface carries out dynamic configuration to the pre- search key content after initialization；
According to the pre- search key bit wide that postpones and with the pre- search key content postponed to the lookup data packet into
Row is pre- to be searched, and searches data packet in advance to obtain；
The pre- lookup data packet is sent to external searching equipment to search.
2. data search method according to claim 1, which is characterized in that the basis matches the pre- search key postponed
Bit wide and the lookup data packet is searched with the pre- search key content postponed in advance, pre- searches data packet tool to obtain
Body includes:
The lookup data packet is split into at least one sub- lookup data with the pre- search key bit wide postponed according to described
Packet；
Hash operation is carried out to the sub- lookup data packet, to obtain corresponding address ram；
The sub- lookup data packet is searched according to the address ram, if at least one sub- lookup data packet
Content with it is described consistent with the pre- search key content postponed, then the lookup data packet is determined as pre- lookup data packet.
3. data search method according to claim 2, which is characterized in that it is described according to the address ram to the son
Lookup data packet search and is searched by dual port RAM.
4. data search method according to claim 2, which is characterized in that according to the address ram to the sub- lookup
Data packet is searched, if the content of the sub- lookup data packet with it is described different with the pre- search key content postponed
It causes, then deletes the lookup data packet.
5. a kind of data search device characterized by comprising
Module is obtained, searches data packet for obtaining；
Pre- searching module, for being searched in advance according to pre- search key the lookup data packet, to obtain pre- lookup number
According to packet；
Wherein, the pre- searching module includes:
Initialization unit, for being initialized to pre- search key bit wide and pre- search key content；
Configuration unit, for being carried out to the pre- search key content after the pre- search key bit wide and initialization after initialization
Configuration；
Wherein, the register reserved by the external control interface configuration of programmable logic device, it is crucial to pretreatment to realize
The wide configuration of word bit；It completes to postpone matching for pre- search key bit wide, is passing through the external of connection programmable logic device and control
Interface carries out dynamic configuration to the pre- search key content after initialization；
Pre- searching unit, for basis with the pre- search key bit wide postponed and with the pre- search key content postponed to institute
It states lookup data packet to be searched in advance, to obtain pre- lookup data packet；
Searching module is searched for the pre- lookup data packet to be sent to external searching equipment.
6. data search device according to claim 5, which is characterized in that the pre- searching unit specifically includes:
Subelement is split, for the lookup data packet to be split at least one according to the pre- search key bit wide postponed
Son searches data packet；
Operation subelement, for carrying out Hash operation to the sub- lookup data packet, to obtain corresponding address ram；
Subelement is determined, for searching according to the address ram the sub- lookup data packet, if described at least one
Son search data packet content with it is described consistent with the pre- search key content postponed, then the lookup data packet is determined as
It is pre- to search data packet.
7. data search device according to claim 6, which is characterized in that it is described according to the address ram to the son
Lookup data packet search and is searched by dual port RAM.
8. data search device according to claim 6, which is characterized in that the determining subelement further comprises:
It deletes and removes subelement, for being searched according to the address ram the sub- lookup data packet, if the sub- lookup
The content of data packet with it is described inconsistent with the pre- search key content postponed, then by the lookup data packet delete.
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| CN1776688A (en) * | 2005-12-15 | 2006-05-24 | 北京金山软件有限公司 | Word data searching method |
| CN1972240A (en) * | 2005-11-24 | 2007-05-30 | 武汉烽火网络有限责任公司 | Fast package filter processing method and its apparatus |
| CN101459489A (en) * | 2007-12-11 | 2009-06-17 | 中兴通讯股份有限公司 | Deep packet detection device and method |
| CN102857493A (en) * | 2012-06-30 | 2013-01-02 | 华为技术有限公司 | Content filtering method and device |
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| JP6170718B2 (en) * | 2012-11-21 | 2017-07-26 | ルネサスエレクトロニクス株式会社 | Search system |
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| CN1972240A (en) * | 2005-11-24 | 2007-05-30 | 武汉烽火网络有限责任公司 | Fast package filter processing method and its apparatus |
| CN1776688A (en) * | 2005-12-15 | 2006-05-24 | 北京金山软件有限公司 | Word data searching method |
| CN101459489A (en) * | 2007-12-11 | 2009-06-17 | 中兴通讯股份有限公司 | Deep packet detection device and method |
| CN102857493A (en) * | 2012-06-30 | 2013-01-02 | 华为技术有限公司 | Content filtering method and device |
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