| 摘要 |
A distributed filesystem operating on a distributed computing system uses existing local filesystems as building blocks. A cluster filesystem layer is added above the local filesystems to handle functions necessary for a distributed filesystem, such as data coherency. A meta-data stub is developed to flush meta-data from the local filesystem to a storage device. In one embodiment, the meta-data stub is a copy of the flush portion of the meta-data portion of a local filesystem. Additionally, the distributed filesystem supports a plurality of coherency algorithms and variable granularity. A user may select the coherency algorithm that best suits the computer system and granularity that best suits the access patterns of the computer system.
|
