CN102508714A - Green-computer-based virtual machine scheduling method for cloud computing - Google Patents
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- CN102508714A CN102508714A CN2011103425851A CN201110342585A CN102508714A CN 102508714 A CN102508714 A CN 102508714A CN 2011103425851 A CN2011103425851 A CN 2011103425851A CN 201110342585 A CN201110342585 A CN 201110342585A CN 102508714 A CN102508714 A CN 102508714A
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Abstract
The invention discloses a green-computing-based virtual machine scheduling method for cloud computing, and belongs to the field of computer networks. The concept of green computing is applied to the cloud computing for virtual machine scheduling. The method comprises the following steps of: sequencing tasks according to priorities, estimating the total energy consumption of each task for each virtual machine, scheduling a virtual machine corresponding to the minimum energy consumption of each task, periodically monitoring a load of a host, and regulating a scheduling plan according to the load. By the method, energy consumption for the virtual machine scheduling is reduced, energy load equalization is taken into account, and the green computing is reflected.
Description
Technical field
The present invention relates to the dispatching method of virtual machine in a kind of cloud computing, and relate to the green thought of calculating, can reduce system energy consumption, belong to Distributed Calculation and applications of computer network field.
Background technology
Cloud computing is one of focus of commercial both at home and abroad at present and scientific research institution's research, and it is distributed in calculation task on the resource pool of great amount of calculation mechanism one-tenth, makes various application systems can obtain computing power, storage space and information service as required.Be accompanied by the growth to computation requirement, the information technoloy equipment in the cloud is more and more, and scale is increasing, and the energy consumption cost problem is also more and more obvious.According to Environmental Protection Agency (US EPA) report, U.S. data center had consumed the electric weight up to 61,000,000,000 kilowatts altogether in 2006.On the other hand, the data from the environmental protection tissue show that the discharge capacity of data center's carbon is also more with the discharge capacity of two countries of Argentina than Holland in the our times scope, accounts for 2% of global CO2 emissions.
Under energy consumption cost and carbon emission amount surprising situation like this, the users of computing machine and server expect a kind of new technology of green energy conservation---green calculating.At present green being calculated does not also have uniform definition, wikipedia to think, green calculating refers to utilize various software/hardware advanced technologies; The operating load of present great amount of calculation machine system is reduced, improve its operation efficiency (like the flop/watt index), reduce computer system quantity; Further reduce system support power supply energy consumption; Simultaneously, improve the design of computer system, improve its resource utilization and the recovery; Reduce carbon dioxide/greenhouse gas emission, thereby reach the purpose of energy-saving and environmental protection and saving.Green calculating is also uncomplicated in fact, and it has mainly embodied theory energy-saving and cost-reducing, the protection environment.
Scheduling virtual machine under the cloud environment is implemented in application layer and virtual resource layer.Cloud computing adopts Intel Virtualization Technology that the mapping resources of main frame is arrived virtual machine layer, carries out user's task.The scheduling virtual machine problem is to be that principle is shone upon with task and resource with certain optimization aim; Cloud computing mechanism has been simplified the coupling of task and resource; Make the embodied of required by task resource with a virtual machine, then the resource searching process is encapsulated as the process of search virtual machine.The scheduling of virtual machine on physical machine has based on priority, based on user expectation with based on the scheduling of load balancing.For example; One piece of Chinese invention patent document (application number is 200910241371.8, and Granted publication number is CN 101706743 A) discloses the dispatching method of virtual machine under a kind of multi-core environment, and this method is when system start-up, cpu resource to be carried out subregion according to the scheduling strategy type; And the cpu load situation of each subregion of monitoring in real time when moving in system; Dynamically adjust the size of subregion cpu resource, and use the virtual machine of identical scheduling strategy in same subregion, to dispatch, improved the efficient of scheduling; Reach the purpose of balancing resource load through the size of dynamic adjustment subregion cpu resource; Realized making full use of of resource, reduced the waste of resource, but the task of not considering is carried out the problem that consumes energy consumption.
The present invention mainly considers the scheduling virtual machine problem the cloud computing from energy-conservation angle, embodies the green theory of calculating.Task scheduling is carried out to virtual machine, needed to be transferred on the computer equipment, so considered the transmission energy consumption among the present invention through network interconnection device; Because computer equipment consumes electric power resource, the present invention has considered the calculating energy consumption.And, carry out scheduling virtual machine calculating energy consumption and the leading indicator transmission energy consumption and the green calculating of conduct.
Summary of the invention
The objective of the invention is the thought that green is calculated is applied to carry out scheduling virtual machine in the cloud computing, proposed the dispatching method of virtual machine that calculates based on green in a kind of cloud computing.
Method of the present invention mainly is at first task according to priority to be sorted; Obtain task list
, m representes current general assignment number.The calculating energy consumption of estimation tasks on all available virtual machines and transmission energy consumption sum then; Select the least energy consumption corresponding virtual machine of each task to dispatch; And periodically monitoring host computer load, the adjustment operation plan, the task of treating all executes the back and destroys virtual machine.
The dispatching method of virtual machine detailed design of calculating based on green in a kind of cloud computing:
In cloud computing environment, green calculating mainly embodied through cutting down the consumption of energy.Energy consumption is meant the total amount of system at a period of time internal consumption electric power resource.Energy consumption in the cloud computing is mainly reflected on computer equipment, network interconnection device and the memory device.The energy consumption that produces on the computer equipment is called the calculating energy consumption, and is relevant with power consumption with task size, virtual machine processing speed, calculates with formula (2).The energy consumption that network interconnection device produces is mainly reflected on the position of task and virtual machine, and is relevant with the size of distance and task.The present invention is called the transmission energy consumption to the energy consumption that produces on the network interconnection device, calculates with formula (3).The memory device energy consumption is main relevant with memory device product and storage means; Little with dispatching method of the present invention relation, therefore the energy consumption that on the cloud platform, produces of dispatching method of virtual machine of the present invention has mainly been considered preceding two kinds, but promptly when the state of virtual machine be the time spent; Energy consumption is represented with transmission energy consumption sum with calculating energy consumption; When the state of virtual machine when being unavailable, can consume infinitely great expression, shown in formula (1).
At first receive the task that the user submits in the inventive method; Priority according to task; Task to arriving sorts; Obtain the task list
of a need scheduling, m representes current general assignment number.Initialization matrix M CTE according to the number of tasks of submitting to first, creates the virtual machine of equal number, and the parameter of each virtual machine of initialization comprises virtual machine numbering (ID), central processing unit (CPU) quantity, storage allocation size, bandwidth, processing speed and state.Estimation tasks is carried out the energy consumption
that consumes on each available virtual machine; To each task in the tabulation; It is distributed to the minimum virtual machine of corresponding energy consumption carries out; From T, delete the task of having distributed; Updating task tabulation, and periodically monitoring host computer load, the adjustment operation plan.Treat that whole tasks are finished, destroy virtual machine.
In sum, it is following to obtain technical scheme of the present invention:
The dispatching method of virtual machine that calculates based on green in a kind of cloud computing may further comprise the steps:
Step 1) receives the task that the user submits to; And according to the priority of task; Task to arriving sorts; Obtain the current task tabulation
of a need scheduling; Wherein m representes current general assignment number, if receive user task first, then carries out next step; Otherwise, turn to step 3);
Step 2) system initialization; Comprise initialization matrix M CTE; According to number of tasks; Create virtual machine, the virtual machine number is identical with the number of tasks that the user submits to, obtains a virtual machine tabulation
; Wherein n representes the virtual machine number; The parameter of each virtual machine of initialization comprises virtual machine numbering (ID), central processing unit (CPU) quantity, storage allocation size, bandwidth, power, processing speed and state then, and the state of each virtual machine is available when initial;
Step 3) judges whether task list is empty, if, then destroy virtual machine, overall process finishes; Otherwise, carry out next step;
Step 4) is according to the least energy consumption strategy, and the minimum virtual machine of the corresponding energy consumption of selection task is dispatched;
Step 5) judges whether the clock period expire, if then carry out next step; Otherwise, turn to step 1);
Step 6) is according to load on host computers, and the adjustment operation plan turns to step 1);
In technical scheme of the present invention, according to the least energy consumption strategy, the minimum virtual machine of the corresponding energy consumption of selection task is dispatched specifically and may further comprise the steps:
Step 401) the matrix M CTE with a m * n representes the energy consumption that m task consumes on n virtual machine; The energy consumption of each row same task of representative on n virtual machine in the matrix; Each row is represented the energy consumption of m task on same virtual machine; Here; I task with
among the expression T; J virtual machine among
expression VM,
expression
are gone up at
and are carried out the energy consumption that consumes;
Step 402) reads current task tabulation T; Estimate the energy consumption
that all tasks consume among the T by following formula on each virtual machine; The i that inserts matrix M CTE is capable; The j row; Be MCTE [i, j]=
;
(1)
In the formula (1);
refers to calculate energy consumption; Be that task
goes up the required energy consumption of operation at certain virtual machine
, unit is joule (J);
refers to transmit energy consumption; Be about to task
and be dispatched to upward required energy consumption of virtual machine
, unit is joule (J); In the formula (2);
is the power consumption of virtual machine
, and unit is a watt (W); The execution time of
expression task
on virtual machine
, unit is second (S); The size of
expression task
; Weigh with instruction number, unit is 1,000,000 instructions (MI);
is the processing speed of virtual machine
, and unit is million instructions per second (MIPS); In the formula (3);
refers to the required energy consumption of unit of transfer's parasang instruction number, and unit is joule every meter (
) of per 1,000,000 instructions;
representes task
is transferred to the distance of virtual machine
, and unit is a rice (m);
Step 403) to each task to be allocated
in the tabulation;
; Compare its power consumption values on each available virtual machine; Get least energy consumption
; K is hour corresponding virtual machine numbering of task
energy consumption; Note min_energy [i]=
; Wherein min_energy is an one-dimension array that contains m element, representes a least energy consumption corresponding virtual machine set by each task;
Step 404) assigns the task to pairing virtual machine successively by the task list order; Be about to task
and distribute to the corresponding virtual machine of value
of min_energy [i]; Deletion
from task list; And upgrade matrix M CTE and task list T, be empty until T.
According to load on host computers, the adjustment operation plan specifically may further comprise the steps:
Step 601) among the present invention; Angle from energy consumption; On the power consumption size of the present main frame of load final body of a certain moment main frame; Here; B main frame of expression with
;
; Y is the main frame sum; The power consumption in main frame
a certain moment is expression with
; The maximum power dissipation of main frame
is expression with
; As the power consumption utilization factor of a certain moment main frame,
is the power consumption utilization factor threshold value of main frame with
;
Step 602) to each main frame; if
;
is the dormancy factor;
; After treating that then virtual machine on
executes task; Destroy virtual machine, and this main frame of dormancy;
Step 603) to each main frame; if
; Then explanation
load is overweight; In this clock period; The Status Flag of all virtual machines that will on this main frame, move is unavailable, i.e. virtual machine allocating task on this main frame again;
Step 604) if host power consumption utilization factor
greater than
;
is the overload factor;
; Most of main frame then is described, and all load is overweight; Wake the main frame of dormancy up and create virtual machine above that, the number of host that wakes up is no more than the number of host that this clock period transshipped.
Compare prior art, the scheduling virtual machine algorithm that calculates based on green in a kind of cloud computing of the present invention has following advantage:
1) dispatching method of virtual machine is simple among the present invention; With the least energy consumption is regulation goal; The virtual machine that each task is all selected to make it consume the energy consumption minimum matees, and may ultimately reach the total energy consumption minimum, and promptly all tasks are finished needs the calculating energy consumption of consumption and transmission energy consumption sum minimum.This method has reduced the energy consumption of scheduling virtual machine, has embodied the theory of green calculating.
2) operation plan is in time adjusted in periodically monitoring host computer load of the present invention, reaches the balanced effect of energy load.
Description of drawings
Fig. 1 is the cloud computing environment synoptic diagram.
Fig. 2 is the scheduling model in the cloud computing environment.
Fig. 3 is the overall flow synoptic diagram of the inventive method.
Embodiment
Describe for ease, we have following application example at supposition:
Cloud computing environment shown in accompanying drawing 1 is made up of scheduling broker and great amount of calculation machine, memory device and the network interconnection device that is connected them.The user can submit task requests anywhere to; Scheduling broker is the interface between user and the cloud computing environment, is used for realizing the inventive method; On a computing machine, can set up or delete a plurality of virtual machines dynamically and satisfy task requests.
In the scheduling model shown in the accompanying drawing 2, comprise y main frame in the physical host, on y main frame, create and built n virtual machine.X user successively submitted m task to; According to the least energy consumption strategy; That the energy consumption of task
is hour the most corresponding is virtual machine
; So being chosen in
,
go up execution; That the energy consumption of task
is hour the most corresponding is virtual machine
, goes up execution so
is chosen in
.
In conjunction with accompanying drawing 3, its embodiment is:
Step 1) user
successively submits m task
to; According to priority; Task to arriving sorts; Obtain the task list
of a need scheduling; If receive user task first, then carry out next step; Otherwise, turn to step 3);
Step 2) system initialization comprises initialization matrix M CTE, according to number of tasks; Create virtual machine; The virtual machine number is identical with the number of tasks that the user submits to, is n here, then the parameter of each virtual machine of initialization; Comprise virtual machine numbering (ID), central processing unit (CPU) quantity, storage allocation size, bandwidth, power, processing speed and state, the state of each virtual machine is available when initial;
Step 3) judges whether task list is empty, if, then destroy virtual machine, overall process finishes; Otherwise, carry out next step;
Step 4) is according to the least energy consumption strategy, and the minimum virtual machine of the corresponding energy consumption of selection task is dispatched, and specific practice is following:
The first step: the matrix M CTE with a m * n representes the energy consumption that m task consumes on n virtual machine; The energy consumption of each row same task of representative on n virtual machine in the matrix; Each row is represented the energy consumption of m task on same virtual machine; Here; I task with
among the expression T; J virtual machine among
expression VM,
expression
are gone up at
and are carried out the energy consumption that consumes;
Second step: read current task tabulation T; Estimate the energy consumption
that all tasks consume among the T by following formula on each virtual machine; The i that inserts matrix M CTE is capable; The j row; Be MCTE [i, j]=
;
In the formula (1);
refers to calculate energy consumption; Be that task
goes up the required energy consumption of operation at certain virtual machine
, unit is joule (J);
refers to transmit energy consumption; Be about to task
and be dispatched to upward required energy consumption of virtual machine
, unit is joule (J); In the formula (2);
is the power consumption of virtual machine
, and unit is a watt (W); The execution time of
expression task
on virtual machine
, unit is second (S); The size of
expression task
; Weigh with instruction number, unit is 1,000,000 instructions (MI);
is the processing speed of virtual machine
, and unit is million instructions per second (MIPS); In the formula (3);
refers to the required energy consumption of unit of transfer's parasang instruction number, and unit is joule every meter (
) of per 1,000,000 instructions;
representes task
is transferred to the distance of virtual machine
, and unit is a rice (m);
The 3rd step: to each task to be allocated
in the tabulation;
; Compare its power consumption values on each available virtual machine; Get least energy consumption
; K is hour corresponding virtual machine numbering of task
energy consumption; Note min_energy [i]=
; Wherein min_energy is an one-dimension array that contains m element, representes a least energy consumption corresponding virtual machine set by each task;
The 4th step: assign the task to pairing virtual machine successively by the task list order; Be about to task
and distribute to the corresponding virtual machine of value
of min_energy [i]; Deletion
from task list; And upgrade matrix M CTE and task list T, be empty until T;
The 5th step: in this instance; Task
goes up at
carries out the energy consumption minimum that consumes; Task
goes up at
carries out the energy consumption minimum that consumes; Then
distributed to virtual machine
; And deletion
from task list;
distributed to virtual machine
, and deletion
from task list;
Step 5) judges whether the clock period expire, if then carry out next step; Otherwise, turn to step 1);
Step 6) is according to load on host computers, and the adjustment operation plan turns to step 1), and specific practice is following:
The first step: among the present invention; Angle from energy consumption; On the power consumption size of the present main frame of load final body of a certain moment main frame; Here; B main frame of expression with
;
; Y is the main frame sum; The power consumption in main frame
a certain moment is expression with
; The maximum power dissipation of main frame
is expression with
; As the power consumption utilization factor of a certain moment main frame,
is the power consumption utilization factor threshold value of main frame with
;
Second step: to each main frame; if
;
is the dormancy factor;
; After treating that then virtual machine on
executes task; Destroy virtual machine, and this main frame of dormancy;
The 3rd step: to each main frame; if
; Then explanation
load is overweight; In this clock period; The Status Flag of all virtual machines that will on this main frame, move is unavailable, i.e. virtual machine allocating task on this main frame again;
The 4th step: if host power consumption utilization factor
greater than
;
is the overload factor;
; Most of main frame then is described, and all load is overweight; Wake the main frame of dormancy up and create virtual machine above that, the number of host that wakes up is no more than the number of host that this clock period transshipped.
Claims (3)
1. the dispatching method of virtual machine that calculates based on green in the cloud computing is characterized in that, may further comprise the steps:
Step 1) receives the task that the user submits to; And according to the priority of task; Task to arriving sorts; Obtain the current task tabulation
of a need scheduling; Wherein m representes current general assignment number, if receive user task first, then carries out next step; Otherwise, turn to step 3);
Step 2) system initialization; Comprise initialization matrix M CTE; According to number of tasks; Create virtual machine, the virtual machine number is identical with the number of tasks that the user submits to, obtains a virtual machine tabulation
; Wherein n representes the virtual machine number; The parameter of each virtual machine of initialization comprises virtual machine numbering (ID), central processing unit (CPU) quantity, storage allocation size, bandwidth, power, processing speed and state then, and the state of each virtual machine is available when initial;
Step 3) judges whether task list is empty, if, then destroy virtual machine, overall process finishes; Otherwise, carry out next step;
Step 4) is according to the least energy consumption strategy, and the minimum virtual machine of the corresponding energy consumption of selection task is dispatched;
Step 5) judges whether the clock period expire, if then carry out next step; Otherwise, turn to step 1);
Step 6) is according to load on host computers, and the adjustment operation plan turns to step 1).
2. dispatching method of virtual machine according to claim 1 is characterized in that said step 4) according to the least energy consumption strategy, and the minimum virtual machine of the corresponding energy consumption of selection task is dispatched and may further comprise the steps:
Step 401) the matrix M CTE with a m * n representes the energy consumption that m task consumes on n virtual machine; The energy consumption of each row same task of representative on n virtual machine in the matrix; Each row is represented the energy consumption of m task on same virtual machine; Here; I task with
among the expression T; J virtual machine among
expression VM,
expression
are gone up at
and are carried out the energy consumption that consumes;
Step 402) reads current task tabulation T; Estimate the energy consumption
that all tasks consume among the T by following formula on each virtual machine; The i that inserts matrix M CTE is capable; The j row; Be MCTE [i, j]=
;
(1)
(3)
In the formula (1);
refers to calculate energy consumption; Be that task
goes up the required energy consumption of operation at certain virtual machine
, unit is joule (J);
refers to transmit energy consumption; Be about to task
and be dispatched to upward required energy consumption of virtual machine
, unit is joule (J); In the formula (2);
is the power consumption of virtual machine
, and unit is a watt (W); The execution time of
expression task
on virtual machine
, unit is second (S); The size of
expression task
; Weigh with instruction number, unit is 1,000,000 instructions (MI);
is the processing speed of virtual machine
, and unit is million instructions per second (MIPS); In the formula (3);
refers to the required energy consumption of unit of transfer's parasang instruction number, and unit is joule every meter (
) of per 1,000,000 instructions;
representes task
is transferred to the distance of virtual machine
, and unit is a rice (m);
Step 403) to each task to be allocated
in the tabulation;
; Compare its power consumption values on each available virtual machine; Get least energy consumption
; K is hour corresponding virtual machine numbering of task
energy consumption; Note min_energy [i]=
; Wherein min_energy is an one-dimension array that contains m element, representes a least energy consumption corresponding virtual machine set by each task;
3. dispatching method of virtual machine according to claim 1 is characterized in that said step 6) according to load on host computers, and the adjustment operation plan may further comprise the steps:
Step 601) among the present invention; Angle from energy consumption; On the power consumption size of the present main frame of load final body of a certain moment main frame; Here; B main frame of expression with
;
; Y is the main frame sum; The power consumption in main frame
a certain moment is expression with
; The maximum power dissipation of main frame
is expression with
; As the power consumption utilization factor of a certain moment main frame,
is the power consumption utilization factor threshold value of main frame with
;
Step 602) to each main frame; if
;
is the dormancy factor;
; After treating that then virtual machine on
executes task; Destroy virtual machine, and this main frame of dormancy;
Step 603) to each main frame; if
; Then explanation
load is overweight; In this clock period; The Status Flag of all virtual machines that will on this main frame, move is unavailable, i.e. virtual machine allocating task on this main frame again;
Step 604) if host power consumption utilization factor
greater than
;
is the overload factor;
; Most of main frame then is described, and all load is overweight; Wake the main frame of dormancy up and create virtual machine above that, the number of host that wakes up is no more than the number of host that this clock period transshipped.
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