Asynchronous systemsDistributionStorageReplication has been shown to be an important tool in the design of high-performance and highly-available distributed systems. When applied to data, however, replication significantly complicates the problem of maintaining consistency within a system. This problem is ...
中国大学MOOC: In log-based recovery mechanism, some transactions need to be undone, while others need to be redone to recover after a failure.<T0 start><T0, A, 100, 90><T0, commit><T1 start><T1, B, 90, 100>What recovery actions do we need to perform according to the given log?
David Lomet £¿ ½Microsoft, ¿Microsoft Research £Redmond, WA USA ½ruiwang, ¿lomet @microsoft.com ¾CCIS, Northeastern University Boston, MA USA salzberg@ccs.neu.edu Abstract— We have developed log-based recovery for middle- ware servers that access back-end transaction system...
The diff logs, which have been created by XOR operations during failure-free execution, can be applicable to any version of remote copies either backward or forward for recovery. Our scheme reduces the checkpointing overhead and also alleviates the imbalance in execution times among nodes due to...
7. Recovery Pacifica 通过Addition of New Secondaries,然后再通过Removal of Secondaries删除下线从节点,来实现下线节点的数据 recovery。实际上还可以通过 window azure storage 的 new-seal 的方式新开复制组,但是在 window azure storage stream layer append-only 的场景下,new-seal 相对处理起来简单,对于一些随机 ...
To process a commit operation, the recovery manager adds a commit record to the end of the log and flushes the log. The log manager is designed so that it doesn’t acknowledge the flush operation until all the log pages in memory, up to and including the one being flushed, have been ...
An efficient fault tolerant algorithm based on movement-based secure checkpointing and logging formobile computing system is proposed here. The recovery scheme proposed here combines independentcheckpointing and message logging. Here we consider mobility
In this paper, we present FASTM, an eager log-based HTM that takes advantage of the processorpsilas cache hierarchy to provide fast abort recovery. FASTM uses a novel coherence protocol to buffer the transactional modifications in the first level cache and to keep the non-speculative values ...
We propose to analyse workflow logs to discover workflow transactional behaviour and to subsequently improve and correct related recovery mechanisms. Our approach starts by collecting workflow logs. Then, we build, by statistical analysis techniques, an intermediate representation specifying elementary ...
The real difference was in some functionality not being executed; however, this can be localized by determining the recovery actions being taken. Therefore, the most important logs were all logs containing string “RecoveryService”. The failed log contained 6980 lines with 1268 templates, whereas ...