However, many applications cannot afford any data inconsistency. Scalable Transactions for Web Applications in the Cloud . CloudTPS is a scalable transaction manager which guarantees full ACID properties for. NoSQL Cloud data services provide scalability and high availability properties for web applications but at the same time they sacrifice data consistency. CloudTPS Scalable Transactions for Web Applications in the Cloud – Free download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online for.
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Cloud computing is becoming one of applicarions most used paradigms to deploy highly available and scalable systems. These systems usually demand the management of huge amounts of data, which cannot be solved with traditional nor replicated database systems as we know them.
Recent solutions store data in special key-value structures, in an approach that commonly lacks the consistency provided by transactional guarantees, as it is traded for high scalability and availability. In order to ensure consistent access to the information, the use of transactions is required. However, it is well-known that traditional replication protocols do not scale well for a cloud environment. Here we take a look at current proposals to deploy transactional systems in the cloud and we propose a new system aiming at being a step clouctps in achieving this goal.
We proceed to focus on data partitioning and describe the key role it plays in achieving high scalability.
Enhancing Data Securing In Cloud Using Scalable Transactions | Open Access Journals
No SQL Cloud data stores provide scalability and high availability properties for web applications, but at the same time they sacrifice data consistency. However, many applications cannot afford any data inconsistency. Cloud TPS is a scalable transaction manager which guarantees full ACID properties for multiitem transactions issued by Web applications, even in the presence of server failures and network partitions.
We implement this approach on top of the two main families of scalable data layers: The given cloud implementation has done on open stack framework using Ubuntu operating environment.
Related clouud at PubmedScholar Google. The use of multiple database instances to maintain security instead of single database instance. It actually divide single document in to two instances.
Where these instances are reside on single cloud. It also support scalable transaction of document. Cloud computing is becoming wider and popular and thus providing a vibrant technical environment where innovative solutions and services can be created.
Cloud promises its end users cheap and flexible services. It offers the vision of a virtually infinite pool of computing, storage and networking resources where applications can be scalable deployed.
Cloud computing provides its users with different types of services. One of the most important service provided by cloud is STaaS i. Customers often store sensitive information with cloud storage providers. Thus providing a secure framework in the cloud computing environment is the challenge which is being faced by the cloud storage providers.
Customers want their data to be secured as well as it should be available at any time. Many a times this becomes difficult with a single cloud provider and it may result in service availability failure as well as the possibility of data intrusion or data getting stelling from the cloud provider.
To overcome these failures we are using AES Advanced Encryption Standard algorithm for encryption and data will be divided into two or more database servers so single whole data is not available at single server. Section 2 describes Literature survey of paper. It gives references of paper and what they suggest.
Section 3 describeImplementation detail of our system with mathematical modelsystem architecture and algorithms used. Section 4will concludethe paper. Abha, Mohit propose a simple data protection model where data is encrypted using Advanced Encryption Standard AES before it is launched in the cloud, thus ensuring data confidentiality and security.
This work aims to promote the use of multi-clouds due to its ability to reduce security risks that affect the cloud computing user. In order to achievepractical efficiency, this mechanism design explicitly decomposesthe LP computation outsourcing into public LP solvers runningon the cloud and private LP parameters owned by the customer. Zhou Wei, Guillaume Pierre, Chi-Hung Chi et sl search thatCloudTPS is a scalable transaction manager which guarantees full ACID properties for multi-item transactions issued by web applications, even in the presence of server failures and network partitions.
So they implement this approach on top of the two main families of scalable data layers: Performance evaluation on top of HBase an open-source version of Bigtable in our local cluster and Amazon SimpleDB in the Amazon cloud shows that our system scales linearly at least up to 40 nodes in our local cluster and 80 nodes in the Amazon cloud.
Opreaintroduce HAIL High-Availability and Integrity Layera distributedcryptographic system that allows a set of servers to prove toa client that a stored file is intact and retrievable.
DebajyotiGitesh, Parthi, Sagar ,Vibha suggest the encryption of the files to be uploaded on the cloud. The integrity and confidentiality of the data uploaded by the user is ensured doubly by not only encrypting it but also providing access to the data only on successful authentication. Let S be the system that use cloud for storing documents created and used by different users.
In this cloud use two instance for dividing document in encrypted format where input by user is plaintext but output is in cipher text. Document must be divided in scalable manner means if large document come it require appropriate time. We operates clohd long-term averages and it might not suit for various traffic burst patterns. The queue is valuable because it buys us more time.
The throughput is only sensible to performance improvements or more servers.
But if the throughput is constant then queuing is going to level traffic bursts at the cost of scalabel the over flown requests processing.
Our connection pool can deliver up to 50 requests per second without ever queueing any incoming connection request. Whenever there are traffic spikes we need to rely on a queue, and since we impose a fixed connection acquire timeout the queue length will be limited. Since the system is considered cloudtp the arrival rate tthe both to the queue entry as for the actual services:. This queuing configuration still delivers 50 requests per second but it may queue requests for 2 seconds as well.
A one second traffic burst of requests would be handled, since:. This spike would require 15 seconds to be fully processed, meaning a queue buffer that takes another 14 seconds to be wcalable. The proposed system aims to build private cloud using open source software OpenStack. The system architecture ofOpenStackis as depicted in Fig. The necessary activities for the life cycle of instances within the OpenStack cloud are handled by Nova.
This characteristic makes Nova a Management Platform to manage various compute resources, networking, authorization, and scalability needs of the OpenStack cloud. Glance is a standalone service which provides a catalog service for storing and querying virtual disk images. Nova and Glance together provides an end-to end solution for cloud disk image management. Swift can store billions of virtual object distributed across the nodes.
The swift offers built-in redundancy, failover management, archiving and media streaming. Swift plays an important role in scalability. Keystone provides identity and access policy services for all components in the OpenStack family. Horizon can be used to manage instances and images, create key pairs, attach volumes to instances,manipulate Swift containers etc.
The proposed system is implemented using open source software called Openstack and Ubuntu operating system. The three nodes such as Compute, Controller and Storage are installed with Ubuntu server operating system becauseall these nodes have to behave like servers as shown in figure Compute node is installed with the Nova packagesand services. Controller node is installed with the Glance,Keystone and Horizon packages and services.
Cloud TPS scalable transactions for web applications in the cloud
Storage node is installed with the Swift or cinder packages andthe services. All three nodes are connected internally to OpenStack Dashboard with internal network.
TheApplication which is ready to use the cloud service is connected through external network to controller node of the private cloud. The installation of nova packages is carried out by downloading the nova packages by the following Command:.
The installation of glance packages is carried out by downloading the glance packages by the following command sudo apt-get install glance glance-api glance-client glance-common glance-registry python- glance These install lines added most of the packages that expected glance-api, nova-registry etc. The installation of keystone packages transcations carried out by downloading the keystone packages by the following command.
The installation of horizon packages is carried out by downloading the horizon packages by the following command. The plaintext input and cipher text output for the A;plications Advanced Cloudd Standard algorithms are blocks of bits. The cipher key input is a sequence ofor bits.
Cloud TPS scalable transactions for web applications in the cloud
In other words the length of the cipher key, Nk, is either 4, 6 or 8 words which represent the number of columns in the cipher key. As a result, the plaintext, cipher text and the cipher key are arranged and processed as arrays of bytes.
For an input, an output or a cipher key denoted by a, the bytes in the resulting array are referenced as anwhere n is in one of the following ranges:. These bytes are interpreted as finite field elements using a polynomial representation:. At the beginning of the encryption process, the State is populated with the plaintext. Then the cipher performs a set of substitutions and permutations on the State.
After the cipher operations are conducted on the State, the final value of the state is copied to the ciphertext output as is shown in the following figure. At the beginning of the cipher, the input array is copied into the State according the following scheme:. At the start of the cipher, the input is copied into the State as described in Section 2. Then, an initial Round Key addition is performed on the State. Round keys are derived from the cipher key using the Key Expansion routine.
The key expansion routine generates a series of round keys for each round of transformations that are performed on the State. The transformations performed on the state are similar among all AES Advanced Encryption Standard versions but the number of transformation rounds depends on the cipher key length. Each round of AES Advanced Encryption Standard cipher except the last one consists of all the following transformation:.
TPS is nothing but a Transaction Processing System which gives an assurance scalable operation between client servers as well distributed architecture. Basically in our project we have use TPS concept for data reliability purpose. In a given research work when data will get divided in different blocks; we have to store it scheduled different cloud servers. The given schema gives an assurance to end user his data is scalable and integrated.
We consider if we have two different cloud servers then how do we use TPS at addition time. We will use the transaction like this. If no errors occurred during the execution of the transaction then the system commits the transaction.
A transaction commit operation applies all data manipulations within the scope of the transaction and persists the results to the cloud database. If an error occurs during the transaction, or if the user specifies a rollback operation, the data manipulations within the transaction are not persisted to the database.