Optimized Task Scheduling in Cloud Computing: A Survey

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Optimized Task Scheduling in Cloud Computing: A Survey

Sabreena Hamid1, Dr. Sandeep Kumar2 1

M. Tech Scholar, 2Professor, Department of Computer Science and Engineering, Galaxy Global Group of Institutions, Dinarpur, Ambala,

Abstract: The increase of cloud computing is so exponential that it offers facts connection between special structures and devices. Due to this boom in connectivity and rapid utilization cloud network desires a statistics grid or computing grid comprising of different type of processing gadgets to perform the query this is despatched to the cloud network. This work provides a review on optimized undertaking scheduling in cloud computing environment. The main element of cloud computing is offering desirable response time for end users, that affords a primary impediment in achievement of cloud computing. All components should coordinate to deal with this mission. This can be handled through a suitable Task scheduling algorithm. So, there's a need of efficient mission scheduling method in implementation of cloud computing surroundings. Due to boom in era and increase in range of statistics facilities the venture dealing with ability of each information centres is foremost concern.

Keywords: Cloud computing, task scheduling, Make span, Minimum/Maximum Execution Time, Minimum/Maximum Completion Time, and Load balancing.


Today’s age is the age of technology. Technology is growing at a totally speedy charge, every and the whole lot is getting connected. Cloud computing has attracted a whole lot interest these days from each enterprise and academia. However, the size and surprisingly dynamic nature of cloud utility imposes enormous new demanding situations to useful resource management. Thus, efficient aid scheduling schemes is still a task. As a new computing version, cloud computing has converted the IT industry with its developing utility and popularization. Though cloud computing gives considerable opportunities, those are many undertaking faces in its improvement process. This research, introduces Task Scheduling strategies and Load Balancing techniques to improve the cloud assets. With the immense growing business areas, distributed computing has all the earmarks of being the main alternative to meet their extending needs. A cloud supplier initially builds up a processing framework called cloud, where a couple of virtual machines are interconnected through this; the provider shapes the undertaking of the customers. Distributed computing is certifiably not a respectful model to offer the customer to a typical pool of configurable processing assets that can be promptly given and discharged low care effort or administration will consider the particular errand planning [7] of better execution registering approaches.

Cloud load adjusting server allocates the heap at the period of growing the couple of CPUs or memories for their assets to scale up with the extended solicitations. This administration is in a general sense associated for business undertaking demands. In cloud, the heap balancer is a host to screen the heap and circulate the heap to VMs by using booking draws near. The heap balancer is used for two significant techniques, one is generally to help the availability of cloud assets and the other is alternatively to propel execution. Asset provisioning framework is used to give best bring about burden adjusting and unwavering quality on distributed computing. It is planned for rendering steady administrations among the distinctive VMs. There are a few sorts of calculations that show up in the writing.


The fundamental part of distributed computing is giving satisfactory reaction time to end clients, that introduces a significant snag in achievement of distributed computing. All segments need to facilitate to deal with this test. This can be dealt with through a reasonable Task booking calculation. Thus, there is a need of productive burden adjusting procedure in execution of distributed computing condition. Kinds of registering that are offered by distributed computing are SaaS (Software as a Service), IaaS (Infrastructure as a Service) and PaaS (Platform as a Service) models.

This work is introduced as pursues. In Section II, It portrays the related work regarding distributed computing. Section III portrays the structure for task planning. The different approaches for tastes scheduling are introduced in Section IV. At last, we conclude in section V.


The writing overviews of different calculations by different scientists are quickly given in the complete writing study:

Dr. Sanjay Tyagi et al. In (2017) [12] proposed a relative examination of Min-Min and Max-Min calculations dependent on the make span parameter. With increment in number of asset demands, they recommended a requirement for effective asset distribution system which focuses on legitimate use of assets. In this manner so as to process these solicitations by utilizing the accessible assets, a productive errand booking calculation is required. An effective undertaking booking system ought to have the option to limit finish time, augment asset usage and limit make span and so forth. In view of the effectiveness measurements or parameters there are various kind of existing booking calculations yet there is no such calculation so far which can enhance every one of these parameters all the while, as each planning calculation chips away at some specific parameter and attempts to improve it as it were. Two heuristic based calculations: Min-Min and Max-Min have been depicted, and afterward examination based investigation has been finished by thinking about makespan parameter. Min-Min planning depends on the idea of allocating an errand having MCT first for execution on the asset, which has the MCT (quickest asset). Max-Min basically gives the need to the biggest assignment and apportions it to the quickest asset.

PeiYun Zhang et al (2018) [1] proposed two phase systems to boost the undertaking planning execution and limit non sensible planning for distributed computing. To order the undertakings that are in the line a classifier called Bayes classifier's standard is utilized. To apportion the undertaking specifically assets numerous quantities of virtual machines are made with various execution abilities. The complete procedure of this two-organize grouping is characterized into four phases task order arrange, Virtual Machine (VM) coordinating stage, prepared lining stage and holding up stage. In the principal arrange, kind of VM and their numbers will be broke down dependent on verifiable assignment booking data with the assistance of Bayes classifier. In coordinating stage, a reasonable VM will be relegated with task. On the off chance that the all out number of line components is lesser than the all out limit then new assignment will be put away in prepared line and if the complete number is higher than all out limit than the undertaking will be distributed in holding up line.

Li Liu et al (2018) [2] proposed a multi-target way to deal with the task scheduling problems. In this research they considered both unconstrained and time cut-off time compelled cases. They also proposed a similarity based order preference solution known as HEFTT algorithms. They likewise adjusted the weights of the search by time to locate the overhead in the system. They also focused on the cost effectiveness of the task scheduling algorithm. They obtain ideal arrangement by three-organize technique under unconstrained issue and modifying the weight esteems for time and different destinations adaptively so as to fulfil the cut off time under the time obliged case.

M. Guo et al (2018) [3] considered the deferral ideal virtual machine (VM) planning issue in distributed computing frameworks, which have a steady measure of foundation assets, for example, CPU, memory and capacity in the asset pool. They embraced a lining model for both heterogeneous and dynamic outstanding tasks at hand. After that VM planning for such lining mists are defined as a basic leadership process, where the vector VM is taken as the choice variable setups and improvement targets are taken as the postpone execution in normal employment time. The outcomes additionally show that regardless of SJF-MMB being sub-delay-ideal in a substantial stacked and profoundly unique condition, throughput brings about terms of occupation facilitating rate provisioning is extremely high.


move increasing speed plan to diminish the information move inactivity. Numerical reproductions show that pre-owned calculations can augment the time-normal benefit in a conveyed online way.

Wu.DaQin et al (2018) [5] executed particle swarm optimization method to improve the undertaking planning calculations effectiveness. For task scheduling utilizing Particle Swarm Optimization (PSO) calculation an iterative choice administrator is utilized for better proficiency. The presented another calculation called as Improved Particle Swarm Optimization calculation (IPSO) to improve the presentation of enhancement, by abstaining from falling into a nearby ideal worth. In this proposed method the convergence values are so better and it reduces task scheduling time costs. The creators said their utilization in the field of so mind boggling issues. Disadvantages: The main drawback with this procedure is its increased complexity and lack of adaptive ability to fix real time problems. The algorithm is more consistent in nature.

Yibin Li and Min Chen (2017) [6] presented dynamic task scheduling algorithm in mobile distributed computing strategy. Their principle objective is to improve control the board by bringing down the stock voltage and recurrence of processors. They have exhibited the EDTS calculation, which uses results from a static scheduling algorithm and lessens vitality utilization. The outcomes on android frameworks proposed by them shows that their calculation can accomplish altogether higher vitality productivity for CPS. Disadvantages: The primary drawback of the proposed method is that its lack of understanding in the virtual machine-based task scheduling.

Anushree B. et al. (2018) [7] exhibited that Task planning is an indispensable part in the field of the cloud condition. Client demands i.e assignments were booked to specific assets at a particular occasion of time. It chiefly engaged to limit the make length and amplify the asset usage. It was a NP-Complete issue. There were various existing heuristic systems for task booking till now yet greater improvement and alteration was required for better execution and to expand the effectiveness of undertaking planning. In this work, hardly any most recent assignment planning procedures had been audited and their exhibitions were broke down as far as different measurements.

W. Qin et al. (2018) [8] introduced that Improved molecule swarm enhancement calculation (IPSO) can improve the capacity of the streamlining, however much as could reasonably be expected abstaining from falling into a neighbourhood ideal. The intermingling impact is smarter to such an extent that the undertaking booking time expenses can be decreased. By re-enactment on a Cloud Sim reproduction stage, the test results show that the calculation has the benefits of improving enhancement and taking less time. V. Ahari et al. (2019) [9] introduced to talk about the correlation of IWDs based calculation with numerous commonplace booking calculations, for example, MIN-MIN, MAX-MIN calculation, Round Robin calculation, FCFS calculation, MCT calculation, PSO calculation and C-PSO calculation where the IWD calculations presents improvement in the utilitarian yield and economy as a rule. H. Zoubi et al. [2019] [10] displayed that the reason for this examination is to enlighten task planning on the cloud utilizing an ongoing bio-roused improvement procedure, the Grasshopper Optimization Algorithm (GOA). The proposed strategy is contrasted and the cutting edge procedures around there, where a decrease of 10% in the make length is acquired.


Undertaking planning is equivalent to advance planning for custom PC working framework. It alludes to sending progress dependent on certain execution request to processor for execution and handling under the precondition that framework asset confinement can be met, in order to limit information correspondence. Distributed computing is improvement of gridding registering, made out of mass business machines and superior servers. It can give virtualized assets as required. Consequently, the asset dynamic gave by distributed computing can contain high adaptability and incredible variety. It has huge client gatherings and there are critical contrasts between the inclinations in client task. All these new highlights of distributed computing can cause numerous new issues in the booking of cloud task.


1) Step 1: Scheduler analyzes the received application program; identifies application program type; and writes analysis results to application configuration file.

2) Step 2: Scheduler decomposes application program (that is task decomposition).

3) Step 3: Scheduler reads resource description file; selects appropriate resources according to user demand; and set up resource allocation policy.

4) Step 4: According to the set resource allocation policy, tasks shall be mapped to corresponding resources. Task scheduling is executed by this means [3].


The essential focal point of task scheduling algorithms is to limit the general execution time of assignments. Here is the comprehensive briefing of these current algorithms.

A. Min-Min Algorithm

Min-Min planning depends on the idea of allocating an assignment having least finishing time (MCT) first for execution on the asset which has the base consummation time (quickest asset). Here we comprehend what errands are accessible to us and what assets are accessible to us. This sort of booking calculation is exceptionally straightforward which gives quickest outcome when the size of assignment in Meta task is little.

B. Max-Min Algorithm

Max-Min planning depends on the idea of allotting an undertaking having most extreme finish time (MCT) first for execution on the asset which has the base fruition time (quickest asset). At the point when the enormous size solicits overlays the number from littler undertakings it gives better outcomes.

C. Improved Max-Min Algorithm

It gives the heap adjusting in little circulated situations. It clarifies the way that the time taken by the littlest asset to execute the biggest undertaking, meanwhile the quickest asset will execute every other errand.

D. Upgraded Max-Min Algorithm

This calculation clarifies the way that as opposed to choosing biggest assignment in the event that we select "Normal or closest more noteworthy than normal errand then in general make range is diminished and furthermore balance load crosswise over assets".


There are instructions for future development of cloud computing: one is constructing large-scale foundation infrastructures in near combination of utility programs, so as to make bigger programs to a larger scale; the other is studying new scheduling algorithms which can better fit detailed applications. This work offers a assessment on optimized task scheduling in Cloud computing. Max-min and Min-min are relevant in small scale allotted systems. When the number of large task is more than small task or vice-versa, each the algorithms cannot schedule the task appropriately and the make span gets relatively larger. Improved Max-min and Enhanced Max-min attempts to gain the weight balancing among the resources by means of scheduling huge project prior to the smaller ones. All simulations will be applied in CloudSim.


[1] Zhang, P., & Zhou, M. (2018). Dynamic cloud task scheduling based on a two-stage strategy. IEEE Transactions on Automation Science and Engineering, 15(2), 772-783.

[2] Liu, L., Fan, Q., & Buyya, R. (2018). A deadline-constrained multi-objective task scheduling algorithm in mobile cloud environments. IEEE Access, 6, 52982-52996.

[3] Guo, M., Guan, Q., & Ke, W. (2018). Optimal scheduling of VMs in queuing cloud computing systems with a heterogeneous workload. IEEE Access, 6, 15178-15191.

[4] Lu, W., Lu, P., Sun, Q., Yu, S., & Zhu, Z. (2018). Profit-aware distributed online scheduling for data-oriented tasks in cloud data centers. IEEE Access, 6, 15629-15642.

[5] Wu, D. (2018). Cloud Computing Task Scheduling Policy Based on Improved Particle Swarm Optimization. In 2018 International Conference on Virtual Reality and Intelligent Systems (ICVRIS) (pp. 99-101). IEEE.


[7] Anushree B, Arul Xavier V M, (2018), " Comparative Analysis of Latest Task Scheduling Techniques in Cloud Computing environment", International Conference on Computing Methodologies and Communication, pp. 608-611.

[8] Wu.DaQin, (2018), "Cloud Computing Task Scheduling Policy Based on Improved Particle Swarm Optimization", International Conference on Virtual Reality and Intelligent Systems, pp. 99-101.

[9] Vinay Ahari, Venkatesan R, (2019), " A Survey on Task Scheduling using Intelligent Water Drops Algorithm in Cloud Computing", International Conference on Trends in Electronics and Informatics, pp. 39-45.

[10] Hussein Al-Zoubi, (2019), " Efficient Task Scheduling for Applications on Clouds", IEEE International Conference on Cyber Security and Cloud Computing, pp. 10-13.

[11] R. Buyya, C. Vecchiola, and S. T. Selvi, “Virtualization,” Mastering Cloud Computing, pp. 71–109, 2013.

[12] Dr. Sanjay Tyagi, Swati Atri, (2017) “A Comparative Analysis of Min-Min and Max-Min Algorithms based on the Makespan Parameter”, International journal of Advanced Research in Computer Science, Vol. 8, No. 3.


Fig 2: Task Scheduling in Cloud [3]

Fig 2:

Task Scheduling in Cloud [3] p.3