| HAL-Inria | Publications, software ... of Inria's scientists |
Reports
Optimal checkpointing period with replicated execution on heterogeneous platforms
Optimal checkpointing period with replicated execution on heterogeneous platforms
Abstract : In this paper, we design and analyze strategies to replicate the execution of an application on two different platforms
subject to failures, using checkpointing on a shared stable storage. We derive the optimal pattern size~$W$
for a periodic checkpointing strategy where both platforms concurrently try and execute $W$ units of work before checkpointing. The first platform that completes its pattern takes a checkpoint,
and the other platform interrupts its execution to synchronize from that checkpoint.
We compare this strategy to a simpler on-failure checkpointing strategy, where a checkpoint is taken by one platform
only whenever the other platform encounters a failure. We use first or second-order approximations to compute
overheads and optimal pattern sizes, and show through extensive simulations
that these models are very accurate. The simulations
show the usefulness of a secondary platform to reduce execution time, even when the platforms have relatively different speeds: in average, over a wide range of scenarios, the overhead is reduced by $30\%$.
The simulations also
demonstrate that the periodic checkpointing strategy is globally more efficient, unless platform speeds are quite close.
https://hal.inria.fr/hal-01504936
Contributor : Equipe Roma <>
Submitted on : Monday, April 10, 2017 - 4:33:44 PM
Last modification on : Monday, November 16, 2020 - 9:58:08 AM
Long-term archiving on: : Tuesday, July 11, 2017 - 2:28:23 PM
Contributor : Equipe Roma <>
Submitted on : Monday, April 10, 2017 - 4:33:44 PM
Last modification on : Monday, November 16, 2020 - 9:58:08 AM
Long-term archiving on: : Tuesday, July 11, 2017 - 2:28:23 PM
File
rr9055inria.pdf
Files produced by the author(s)