Abstract: According to the present invention, a body of an anchor bolt of a certain standard is inserted into a hole drilled in the ceiling, floor, or wall of concrete, and a wedge bolt is inserted into a body screw, then by rotating it in a tightening direction, a wedge portion of the wedge bolt is squashed into a spread portion of the anchor body with force of the screw so that it is firmly fixed, and the inserted wedge bolt may be rotated so that it may be loosened and extracted, so that it is possible to easily carry out demolishing work.

Abstract: Methods and systems for improving the performance of a distributed job scheduler by dynamically splitting and distributing the work of a single job into parallelizable tasks that are executed among multiple nodes in a cluster are described. The distributed job scheduler may split a job into a plurality of tasks and assign the tasks to nodes within the cluster based on a time remaining to complete the job, an estimated time to complete the job, and a number of identified healthy nodes within the cluster. The distributed job scheduler may monitor job progress over time and adjust (e.g., increase) the number of nodes used to execute the plurality of tasks if the time remaining to complete the job falls below a threshold amount of time or if the time remaining to complete the job minus the estimated time to complete the job falls below the threshold amount of time.

Abstract: Methods and systems for improving the performance of a distributed job scheduler by dynamically splitting and distributing the work of a single job into parallelizable tasks that are executed among multiple nodes in a cluster are described. The distributed job scheduler may split a job into a plurality of tasks and assign the tasks to nodes within the cluster based on a time remaining to complete the job, an estimated time to complete the job, and a number of identified healthy nodes within the cluster. The distributed job scheduler may monitor job progress over time and adjust (e.g., increase) the number of nodes used to execute the plurality of tasks if the time remaining to complete the job falls below a threshold amount of time or if the time remaining to complete the job minus the estimated time to complete the job falls below the threshold amount of time.