Moreover, while checkpointing time was considered in their model, the actual checkpointing time on spinning disks, especially for cloud systems that are not specialized for parallel I/O, can represent much more than 10% of overhead, which is the value expected for very large-scale machines such as APEX and EXASCALE.
While checkpointing provides benefits in a variety of situations, it is especially useful in highly parallel systems with a large number of processors used in high performance computing.
For example, p53 is a main checkpoint regulator in G1/S phase, while checkpoint kinase 1/2 (CHK1/22, CHK1/2) is crucial in S and G2/M checkpoints.
For a while, soldiers at checkpoints confiscated bunches of it from bewildered Palestinians who had merely wanted something to liven up their salads.
Sand berms, fences and watchtowers ring the villages while Iraqi Army checkpoints provide limited access.
"How was the car able to get in there while these checkpoints have all these technical devices?" asked Mr. Faleh, who was also wounded.
While security checkpoints have tied up traffic going in and out of New York, city officials said yesterday that there had been no threats of attacks on the city's bridges and tunnels.
While sobriety checkpoints served to protect the public from an "immediate, vehicle-bound threat to life and limb," she said, roadblocks for drug detection primarily served the ordinary law enforcement interest in crime control.
While the checkpoints do catch some drunken drivers, the police manning them are also leaving sober but unlicensed drivers, like Bernardino, on the side of the road, with no hope of regaining their vehicle for at least a month.
