By running transactions under the SNAPSHOT isolation we can achieve a good level of concurrency, specially in databases with high-intensive read workloads. However, SNAPSHOT is not immune to all the problems that arise from competing transactions and therefore no serialization warranty exists. We propose in this paper a technique to obtain data consistency with SNAPSHOT by using some special tr...

Abstract—Snapshot is a fundamental notion proposed for routing in mobile low earth orbit (LEO) satellite networks which is characterized with predictable topology dynamics. Its distribution has a great impact on the routing performance and on-board storage. Originally, the snapshot distribution is invariable by using the static snapshot partition method based on the mechanical steering antenna....

The management of virtual machine cluster (VMC) is challenging owing to the reliability requirements, such as non-stop service, failure tolerance, etc. Distributed snapshot of VMC is one promising approach to support system reliability, it allows the system administrators of data centers to recover the system from failure, and resume the execution from a intermediate state rather than the initi...

Although direct sequencing is the gold standard for KRAS mutation detection in routine diagnostics, it remains laborious, time consuming, and not very sensitive. Our objective was to evaluate SNaPshot and the KRAS StripAssay as alternatives to sequencing for KRAS mutation detection in daily practice. KRAS exon 2-specific PCR followed by sequencing or by a SNaPshot reaction was performed. For th...

While snapshots have been commonly used in data storages for backup and data protections, little is known in the open literature how such snapshots impact application performance. This paper presents an implementation and performance evaluation of two snapshot techniques: copy-on-write snapshot and redirect-on-write snapshot. Our implementation is carried out at block level on a standard iSCSI ...

Applications need to analyze the past state of their data to provide auditing and other forms of fact checking. Retrospective snapshot systems that support computations over data store snapshots, allow applications using simple data stores like Berkeley DB or SQLite, to provide past state analysis in a convenient way. Current snapshot systems however, offer no satisfactory support for computati...

Due to the call for fast KRAS mutation status analysis for treatment of patients with monoclonal antibodies for metastatic colorectal cancer, sensitive, economic, and easily feasible methods are required. Under this aspect, the sensitivity and specificity of the SNaPshot analysis in comparison to the commonly used DNA sequencing was checked. We examined KRAS mutations in exon 2 codons 12 and 13...