Dynamically adjusting the number of replicas of a file according to 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 system for dynamically managing a number of replicas of a file in a distributed file system, comprising:
one or more processors; a memory coupled to at least one of the processors; a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions of: in a distributed file system with a number of replicas of a file set to two or more replicas, setting 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 the timer; and responsive to the timer matching a first timer window threshold, automatically reducing 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.