Distributed processing system
First Claim
1. A distributed processing method which controls access to a shared storage unit shared by a plurality of computers, the method comprising:
- managing a storage quota of each user, the storage quota limiting the total amount of data that each user is allowed to store on the shared storage unit;
identifying a particular user who has issued a write request from one of the plurality of computers in an attempt to store data into the shared storage unit;
calculating a free storage quota of the particular user identified; and
allocating, to the one of the plurality of computers issuing the write request, a reserve space as part of the free storage quota calculated, the reserve space being an amount of storage space on the shared storage unit which is to be managed at the discretion of the one of the plurality of computers issuing the write request,wherein a requesting computer executes another write request from a same user without being allocated a new reserve space as long as a data size of the another write request does not exceed a remaining reserve space.
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Accused Products
Abstract
A distributed processing system which enables a plurality of computers to make quick access to a shared storage unit. A storage quota management unit manages storage quotas, which limit the total amount of data that each user can store on the shared storage unit. When a write request to the shared storage unit is issued at a certain computer, a user identification unit identifies the requesting user. Then a free quota calculation unit calculates the remaining free storage quota of the identified user. A reserve space allocation unit allocates an appropriate reserve space to the computer according to the remaining free storage quota, allowing the computer to use the allocated reserve space at its discretion to handle the user'"'"'s data write request.
56 Citations
9 Claims
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1. A distributed processing method which controls access to a shared storage unit shared by a plurality of computers, the method comprising:
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managing a storage quota of each user, the storage quota limiting the total amount of data that each user is allowed to store on the shared storage unit; identifying a particular user who has issued a write request from one of the plurality of computers in an attempt to store data into the shared storage unit; calculating a free storage quota of the particular user identified; and allocating, to the one of the plurality of computers issuing the write request, a reserve space as part of the free storage quota calculated, the reserve space being an amount of storage space on the shared storage unit which is to be managed at the discretion of the one of the plurality of computers issuing the write request, wherein a requesting computer executes another write request from a same user without being allocated a new reserve space as long as a data size of the another write request does not exceed a remaining reserve space.
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2. A distributed processing system which has a shared storage unit shared by a plurality of computers, the system comprising:
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storage quota management means for managing a storage quota of each user, the storage quota limiting the total amount of data that each user is allowed to store on the shared storage unit; user identification means for identifying a particular user who has issued a write request from one of the plurality of computers in an attempt to store data into the shared storage unit; free quota calculation means for calculating a free storage quota of the particular user identified by said user identification means; and reserve space allocation means for allocating, to the one of the plurality of computers issuing the write request, a reserve space as part of the free storage quota calculated by said free quota calculation means, the reserve space being an amount of storage space on the shared storage unit which is to be managed at the discretion of the one of the plurality of computers issuing the write request, wherein the requesting computer consumes the received reserve space on the shared storage unit in executing the write request, and the requesting computer executes another write request from the same user without the need for being allocated a new reserve space by said reserve space allocation means, as long as data size of the new write request does not exceed the remaining reserve space. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A distributed processing method which controls access to a shared storage unit shared by a plurality of computers, comprising:
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identifying a particular user who has issued a write request from one of the plurality of computers in an attempt to store data into the shared storage unit; calculating a free storage quota of the identified user; and allocating a reserve space as cart of the free storage quota, the reserve space being an amount of storage space on the shared storage unit which is to be managed at the discretion of the one of the plurality of computers issuing the write request, wherein the requesting computer executes another write request from a same user without being allocated a new reserve space as long as a data size of the another write request does not exceed remaining reserve space. - View Dependent Claims (9)
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Specification