Patent ID: 7953701
Filing Date: 2011-05-31
Classification: G06F

Abstract:
1. A method for managing disk usage amount of an user in a system including a plurality of network storages which provide users with respective disk spaces, having a disk quota indicating an upper limit of total disk usage of the user in the system, and an information processing apparatus which executes a write request for a network storage, the method, which is executed by the information processing apparatus, comprising the steps of: at a timing of judging a limit of disk usage based on measurements, measuring disk usage of said user in each of said network storages, subtracting the measured disk usages from the registered disk quota and registering a threshold value indicating an amount of disk space remaining for said user; accumulating write size estimated from each of write requests which have been issued from said user, each time when a write request is issued from said user; checking whether the accumulated write size exceeds a registered threshold value, which is lower than the disk quota, and which is held by the information processing apparatus; accepting a latest write request as an executable request which does not induce a quota error, if the accumulated write size does not exceed the registered threshold value; and accessing to the network storage, and deciding whether the latest write request is executable or not, based on the accumulated write size and the disk quota, if the accumulated write size exceeds the registered threshold value.