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Two-level incremental checkpoint recovery scheme for reducing system total overheads.

Li H, Pang L, Wang Z - PLoS ONE (2014)

Bottom Line: The checkpoint technology is used to reduce the losses in the event of a failure.The comparison results show that the total overheads of setting checkpoints, the total re-computing time and the system total overheads in the two-level incremental checkpoint recovery scheme are all significantly smaller than those in the two-level checkpoint recovery scheme.At last, limitations of our study are discussed, and at the same time, open questions and possible future work are given.

View Article: PubMed Central - PubMed

Affiliation: School of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an, China; Department of Computer Science, Wayne State University, Detroit, Michigan, United States of America.

ABSTRACT
Long-running applications are often subject to failures. Once failures occur, it will lead to unacceptable system overheads. The checkpoint technology is used to reduce the losses in the event of a failure. For the two-level checkpoint recovery scheme used in the long-running tasks, it is unavoidable for the system to periodically transfer huge memory context to a remote stable storage. Therefore, the overheads of setting checkpoints and the re-computing time become a critical issue which directly impacts the system total overheads. Motivated by these concerns, this paper presents a new model by introducing i-checkpoints into the existing two-level checkpoint recovery scheme to deal with the more probable failures with the smaller cost and the faster speed. The proposed scheme is independent of the specific failure distribution type and can be applied to different failure distribution types. We respectively make analyses between the two-level incremental and two-level checkpoint recovery schemes with the Weibull distribution and exponential distribution, both of which fit with the actual failure distribution best. The comparison results show that the total overheads of setting checkpoints, the total re-computing time and the system total overheads in the two-level incremental checkpoint recovery scheme are all significantly smaller than those in the two-level checkpoint recovery scheme. At last, limitations of our study are discussed, and at the same time, open questions and possible future work are given.

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The relationship between Tre-compute2 and the checkpoint interval.
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pone-0104591-g002: The relationship between Tre-compute2 and the checkpoint interval.

Mentions: When a transient failure occurs, the re-computing time Tre-compute2 is the interval from last recovery checkpoint to the failure time. The relationship between Tre-compute2 and the checkpoint interval is shown in Fig. 2. Tre-compute2 can be expressed as (3) [18], where k is a re-computing time coefficient variable between (0, 1).


Two-level incremental checkpoint recovery scheme for reducing system total overheads.

Li H, Pang L, Wang Z - PLoS ONE (2014)

The relationship between Tre-compute2 and the checkpoint interval.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4128665&req=5

pone-0104591-g002: The relationship between Tre-compute2 and the checkpoint interval.
Mentions: When a transient failure occurs, the re-computing time Tre-compute2 is the interval from last recovery checkpoint to the failure time. The relationship between Tre-compute2 and the checkpoint interval is shown in Fig. 2. Tre-compute2 can be expressed as (3) [18], where k is a re-computing time coefficient variable between (0, 1).

Bottom Line: The checkpoint technology is used to reduce the losses in the event of a failure.The comparison results show that the total overheads of setting checkpoints, the total re-computing time and the system total overheads in the two-level incremental checkpoint recovery scheme are all significantly smaller than those in the two-level checkpoint recovery scheme.At last, limitations of our study are discussed, and at the same time, open questions and possible future work are given.

View Article: PubMed Central - PubMed

Affiliation: School of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an, China; Department of Computer Science, Wayne State University, Detroit, Michigan, United States of America.

ABSTRACT
Long-running applications are often subject to failures. Once failures occur, it will lead to unacceptable system overheads. The checkpoint technology is used to reduce the losses in the event of a failure. For the two-level checkpoint recovery scheme used in the long-running tasks, it is unavoidable for the system to periodically transfer huge memory context to a remote stable storage. Therefore, the overheads of setting checkpoints and the re-computing time become a critical issue which directly impacts the system total overheads. Motivated by these concerns, this paper presents a new model by introducing i-checkpoints into the existing two-level checkpoint recovery scheme to deal with the more probable failures with the smaller cost and the faster speed. The proposed scheme is independent of the specific failure distribution type and can be applied to different failure distribution types. We respectively make analyses between the two-level incremental and two-level checkpoint recovery schemes with the Weibull distribution and exponential distribution, both of which fit with the actual failure distribution best. The comparison results show that the total overheads of setting checkpoints, the total re-computing time and the system total overheads in the two-level incremental checkpoint recovery scheme are all significantly smaller than those in the two-level checkpoint recovery scheme. At last, limitations of our study are discussed, and at the same time, open questions and possible future work are given.

Show MeSH