DYNAMICALLY ADJUSTING THE NUMBER OF REPLICAS OF A FILE ACCORDING THE PROBABILITY THAT THE FILE WILL BE ACCESSED WITHIN A DISTRIBUTED FILE SYSTEM

摘要

In a distributed file system with a number of replicas of a file set to two or more replicas, a computer sets a timer to track a time since a last access to the file, wherein the replicas of the file are distributed across two or more nodes within the distributed file system. Responsive to an access to the file prior to the timer reaching a first timer window threshold, the computer resets the timer. Responsive to the timer matching a first timer window threshold, the computer automatically reduces a number of replicas of the file within the distributed file system, wherein the probability that the file will be accessed prior to the first timer window threshold is greater than the probability that the file will be accessed after the first timer window threshold.

主权项

1. A method for dynamically managing a number of replicas of a file in a distributed file system, comprising:
in a distributed file system with a number of replicas of a file set to two or more replicas, setting, by a computer, a timer to track a time since a last access to the file, wherein the replicas of the file are distributed across two or more nodes within the distributed file system; responsive to an access to the file prior to the timer reaching a first timer window threshold, resetting, by the computer, the timer; and responsive to the timer matching a first timer window threshold, automatically reducing, by the computer, a number of replicas of the file within the distributed file system, wherein the probability that the file will be accessed prior to the first timer window threshold is greater than the probability that the file will be accessed after the first timer window threshold.