CN107241365A - A kind of cloud platform method for synchronizing time - Google Patents
A kind of cloud platform method for synchronizing time Download PDFInfo
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- CN107241365A CN107241365A CN201710689808.9A CN201710689808A CN107241365A CN 107241365 A CN107241365 A CN 107241365A CN 201710689808 A CN201710689808 A CN 201710689808A CN 107241365 A CN107241365 A CN 107241365A
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- time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/28—Timers or timing mechanisms used in protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses a kind of cloud platform method for synchronizing time, comprise the following steps：The 1st, time server is set, and the time server is used to receive the outside reference time；2nd, all physical nodes of physical layer are set into time synchronized priority, time synchronized priority level highest physical node carries out time synchronized with time server, and remaining physical node carries out time synchronized with time synchronized priority level highest physical node；3rd, virtual level application software obtains the machine time of the resident physical node of dummy node.This method can realize that the time of synchronous cloud platform physical layer time, physical layer and virtual level shares and virtual level time synchronized, effectively the punctual precision of lifting virtual level and timing tracking accuracy.
Description
Technical field
The invention belongs to field of cloud computer technology, and in particular to the time of physical layer and virtual level in a kind of cloud computing platform
Synchronous method.
Background technology
Cloud platform realizes the integration or division of physical resource using virtualization technology, is built by creating virtual machine virtual
Layer；The virtual machine unit also referred to as dummy node run in virtual level, split assign to of user's request is held in different dummy nodes
Row distributed treatment；Physical resource, including the resource such as calculating, storage, network, are the infrastructure of cloud platform, constitute cloud and put down
The physical layer of platform, wherein each resource is physical node.
In cloud platform widely used today, cloud platform time synchronization problem turns into asking of must go to face and solve
Topic.The time synchronized of cloud platform includes cloud platform virtual level time synchronized and the synchronous two parts content of cloud platform physical layer time,
Now widely used cloud platform Time synchronization technique is broadly divided into two kinds：The first technology is to realize physics by cloud platform itself
Layer time synchronized, virtual level user realizes virtual level time synchronized as needed；The time synchronized of Huawei's cloud platform uses the skill
Art scheme；Second of technology is that on physical layer time synchronous foundation, time broadcast is carried out to virtual level by physical layer timing,
Virtual level time synchronized is realized, the time synchronized of kylin cloud platform uses the technical scheme.Test data shows：In LAN ring
Under border, using any of the above cloud platform Time Synchronizing, the timing tracking accuracy of physical layer reaches 1ms, virtual level
Timing tracking accuracy reaches 10ms, and the timing tracking accuracy of virtual level reduces an order of magnitude compared with physical layer.
In summary, existing cloud platform network time synchronization technology has the following disadvantages：
(1) need to realize physical layer, virtual level time synchronized respectively, the extra calculating of increase and maintenance cost；
No matter use and realize time synchronized in physical layer, virtual level respectively, or use synchronization of the physical layer to virtual level
Time broadcast technology, is required for considering virtual level time synchronized while physical layer time is synchronous, adds extra calculating
And maintenance cost.
(2) the punctual precision of virtual level is low；
Physical layer clocks are kept using crystal oscillator realization, and punctual precision can reach 1E-5；The clock of virtual level is kept using soft
Part timer is realized, there is the problem of punctual stability is low, reliability is poor, causing the punctual ability of virtual level can not ensure.I.e.
Make to realize virtual level time synchronized, calibration can only be timed to the virtual level time, it is impossible to change the punctual precision of virtual level low
Intrinsic drawback.
(3) virtual level timing tracking accuracy is low；
No matter use and realize time synchronized in physical layer, virtual level respectively, or use synchronization of the physical layer to virtual level
Time broadcast technology, the timing tracking accuracy of virtual level is than physical layer order of magnitude lower.Its reason is the sheet of virtual level
Matter is one group of application process for operating in physical layer, is dispatched by CPU is simulated in physical layer hardware CPU scheduling mechanisms, virtual level
Mechanism double influence, virtual level is unable to reach the timing tracking accuracy consistent with physical layer.
The content of the invention
Goal of the invention：For problems of the prior art, the invention discloses a kind of cloud platform method for synchronizing time,
It can realize that the time of synchronous cloud platform physical layer time, physical layer and virtual level shares and virtual level time synchronized, effectively
Lift the punctual precision of virtual level and timing tracking accuracy.
Technical scheme：The present invention is adopted the following technical scheme that：A kind of cloud platform method for synchronizing time, comprises the following steps：
(1) time server is set, and the time server is used to receive the outside reference time；
(2) all physical nodes of physical layer are set into time synchronized priority, time synchronized priority level highest thing
Manage node and carry out time synchronized with time server, remaining physical node enters with time synchronized priority level highest physical node
Row time synchronized；
(3) virtual level application software obtains the machine time of the resident physical node of dummy node.
The time server, which is provided with satellite reception module, to be used to receive standard UTC time；To realize that high accuracy is punctual
Function, the time server is additionally provided with atomic clock module.
All physical nodes of physical layer can set in time synchronized priority, the present invention according to multiple rule and preferably press
Reliability according to physical node sets time synchronized priority, and the time synchronized priority of reliability highest physical node is most
It is high.
Time synchronized priority level highest physical node carries out time synchronized with time server using Network Time Protocol；Its
Remaining physical node also carries out time synchronized with time synchronized priority level highest physical node using Network Time Protocol.
When time synchronized priority level highest physical node is dissolved or during failure, access time synchronization priority level time is high
Physical node and time server carry out time synchronized, remaining physical node physics section high with time synchronized priority level time
Point carries out time synchronized；When time synchronized priority level highest physical node redeploys or recovers normal, time synchronized
Priority level highest physical node carries out time synchronized, remaining physical node and time synchronized priority level with time server
Highest physical node carries out time synchronized.
The step (3) comprises the following steps：
(3.1) virtual level application software allocating time obtains function；
(3.2) cloud platform software reads the resident physical node machine time of dummy node, and returns to virtual level application
Software.
Beneficial effect：Compared with prior art, cloud platform method for synchronizing time disclosed by the invention has advantages below：1、
The time for realizing synchronous cloud platform physical layer time, physical layer and virtual level shares and virtual level time synchronized；2nd, it is virtual
Layer directly accesses physical layer clocks resources technology, and virtual level shares the time synchronized result of physical layer and the time keeps result, empty
Intend the timing tracking accuracy of layer, punctual precision improvement to identical with physical layer, punctual precision reaches 1E-5；3rd, virtual level need not
Extra time synchronous calculating and maintenance cost with maintenance.
Brief description of the drawings
Fig. 1 is the system assumption diagram of cloud platform method for synchronizing time disclosed by the invention；
Fig. 2 is the astronomical time function call timing diagram of application software in virtual machine in embodiment.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated.
As shown in figure 1, being the system assumption diagram of cloud platform method for synchronizing time disclosed by the invention, 1 is time server,
For receiving the outside reference time；2 be physical layer, wherein containing a number of physical node 3；Using virtualization technology,
It is created that some virtual machines 5 build virtual level 4.
Cloud platform method for synchronizing time disclosed by the invention is described in detail below：
Step 1：Time server is set, and the time server is used to receive the outside reference time；
In the present embodiment, satellite reception module and atomic clock module are provided with time server 1, satellite reception module is used
In receiving standard UTC time, in order to more reliably receive UTC time, believed using multi-mode satellite receiving module, including GPS time services
Number reception and Big Dipper time signal reception.Atomic clock module is used to realize that high accuracy is punctual.
Step 2：Time synchronized priority, time synchronized priority level highest are set to all physical nodes of physical layer
Physical node carries out time synchronized, remaining physical node and time synchronized priority level highest physical node with time server
Carry out time synchronized；
Time synchronized priority, reliability highest physical node are set according to the reliability of physical node in the present embodiment
Time synchronized highest priority, in Fig. 16 be highest Time priority physical node.
Installation time broadcast module on time server in the present embodiment, using Network Time Protocol to time synchronized priority level
Highest physical node broadcast standard UTC time, realizes time synchronized；Remaining physical node and time synchronized priority level highest
Physical node time synchronized is also carried out using Network Time Protocol, thus achieve the time synchronized of physical layer with it is high-precision punctual.
When time synchronized priority level highest physical node 6 is dissolved or during failure, access time synchronization priority level time
High physical node carries out time synchronized, remaining physical node physics high with time synchronized priority level time with time server
Node carries out time synchronized；When time synchronized priority level highest physical node redeploys or recovers normal, the time is same
Walk priority level highest physical node and carry out time synchronized, remaining physical node and time synchronized priority with time server
Other highest physical node carries out time synchronized.
Step 3：Virtual level application software obtains the machine time of the resident physical node of dummy node；Specifically include：
(3.1) virtual level application software allocating time obtains function；
(3.2) cloud platform software reads the resident physical node machine time of dummy node, and returns to virtual level application
Software.
By taking the virtual level application software acquisition time as an example, as shown in Fig. 2 virtual level application software allocating time obtains letter
Number, this function obtains the machine time of the resident physical node of virtual level application software by cloud platform software, and returns to void
Intend layer application software.
Claims (8)
1. a kind of cloud platform method for synchronizing time, it is characterised in that comprise the following steps：
(1) time server is set, and the time server is used to receive the outside reference time；
(2) all physical nodes of physical layer are set into time synchronized priority, time synchronized priority level highest physics section
Point carries out time synchronized with time server, when remaining physical node is carried out with time synchronized priority level highest physical node
Between it is synchronous；
(3) virtual level application software obtains the machine time of the resident physical node of dummy node.
2. cloud platform method for synchronizing time according to claim 1, it is characterised in that the time server, which is provided with, to be defended
Star receiving module is used to receive standard UTC time.
3. cloud platform method for synchronizing time according to claim 2, it is characterised in that the time server also sets up original
Secondary clock module realizes the punctual function of high accuracy.
4. cloud platform method for synchronizing time according to claim 1, it is characterised in that time synchronized priority level highest
Physical node carries out time synchronized with time server using Network Time Protocol；Remaining physical node and time synchronized priority level are most
High physical node carries out time synchronized using Network Time Protocol.
5. cloud platform method for synchronizing time according to claim 1, it is characterised in that when time synchronized priority level highest
Physical node dissolve or during failure, the high physical node of access time synchronization priority level time carries out the time with time server
Synchronous, remaining physical node physical node high with time synchronized priority level time carries out time synchronized.
6. cloud platform method for synchronizing time according to claim 5, it is characterised in that when time synchronized priority level highest
Physical node when redeploying or recovering normal, time synchronized priority level highest physical node is carried out with time server
Time synchronized, remaining physical node carries out time synchronized with time synchronized priority level highest physical node.
7. cloud platform method for synchronizing time according to claim 1, it is characterised in that the step (3) includes following step
Suddenly：
(3.1) virtual level application software allocating time obtains function；
(3.2) cloud platform software reads the resident physical node machine time of dummy node, and returns to virtual level application software.
8. cloud platform method for synchronizing time according to claim 1, it is characterised in that all physical nodes of physical layer are pressed
Reliability according to physical node sets time synchronized priority, and the time synchronized priority of reliability highest physical node is most
It is high.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729123A (en) * | 2017-10-24 | 2018-02-23 | 郑州云海信息技术有限公司 | The virtual machine method, apparatus synchronous with host time time zone, equipment and medium |
| CN111404628A (en) * | 2019-06-05 | 2020-07-10 | 杭州海康威视系统技术有限公司 | Time synchronization method and device |
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| CN103077067A (en) * | 2012-12-26 | 2013-05-01 | 华为技术有限公司 | Method, device and equipment for detecting system time of virtual machine |
| CN103957233B (en) * | 2014-03-26 | 2017-03-15 | 哈尔滨工业大学 | Based on processor pyrene and the real-time communication platform of virtual machine |
| CN106909197A (en) * | 2017-02-28 | 2017-06-30 | 郑州云海信息技术有限公司 | A kind of virtualized host time management method and virtualized host system |
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2017
- 2017-08-14 CN CN201710689808.9A patent/CN107241365A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077067A (en) * | 2012-12-26 | 2013-05-01 | 华为技术有限公司 | Method, device and equipment for detecting system time of virtual machine |
| CN103957233B (en) * | 2014-03-26 | 2017-03-15 | 哈尔滨工业大学 | Based on processor pyrene and the real-time communication platform of virtual machine |
| CN106909197A (en) * | 2017-02-28 | 2017-06-30 | 郑州云海信息技术有限公司 | A kind of virtualized host time management method and virtualized host system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107729123A (en) * | 2017-10-24 | 2018-02-23 | 郑州云海信息技术有限公司 | The virtual machine method, apparatus synchronous with host time time zone, equipment and medium |
| CN111404628A (en) * | 2019-06-05 | 2020-07-10 | 杭州海康威视系统技术有限公司 | Time synchronization method and device |
| CN111404628B (en) * | 2019-06-05 | 2022-03-29 | 杭州海康威视系统技术有限公司 | Time synchronization method and device |
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Address after: No.1 Lingshan South Road, Qixia District, Nanjing City, Jiangsu Province 210046 Applicant after: THE 28TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY Group Corp. Address before: 210003 No. 1 East Garden Street, Qinhuai District, Jiangsu, Nanjing Applicant before: THE 28TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY Group Corp. |
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Application publication date: 20171010 |
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