Method and apparatus for managing file system of unified storage system

Abstract

The disclosure relates to a method and apparatus of managing a file system of a unified storage system. According to embodiments of the present disclosure, the method comprises: creating a thin provisioning storage pool in a block level; mapping the thin provisioning storage pool to a file storage pool in a file level; and creating a file system by using the file storage pool. In this way, a capacity of the file system is expanded or shrunk without rebalancing or migrating data in the storage system.

What is claimed is: 
     
         1 . A method for managing a file system of a unified storage system, the unified storage system comprising a file level and a block level having a block-based physical storage space, the method comprising:
 creating a thin provisioning storage pool in the block level;   mapping the thin provisioning storage pool to a file storage pool in the file level; and   creating the file system by using the file storage pool.   
     
     
         2 . The method of  claim 1 , further comprising:
 receiving a request to change a capacity of the file system; and   in response to the request, changing the capacity of the file system by changing a capacity of the thin provisioning storage pool.   
     
     
         3 . The method of  claim 1 , further comprising:
 prompting a user to add a new physical storage space in the block level in response to an amount of data in the file system exceeding a pre-defined proportion of the block-based physical storage space.   
     
     
         4 . The method of  claim 1 , further comprising, in response to the thin provisioning storage pool being shrunk to be less than a pre-defined threshold, performing at least one of the following:
 refusing a shrinking request; and   prompting a user to delete data in the file system.   
     
     
         5 . The method of  claim 1 , further comprising creating a plurality of storage volumes for the mapping according to the thin provisioning storage pool. 
     
     
         6 . The method of  claim 5 , wherein a total capacity of the plurality of storage volumes is equal to a maximum capacity of the thin provisioning storage pool. 
     
     
         7 . An apparatus for managing a file system of a unified storage system, the unified storage system comprising a file device and a block device having a block-based physical storage space, the apparatus comprising:
 a thin provisioning storage pool creating unit configured to create a thin provisioning storage pool in the block device;   a mapping unit configured to map the thin provisioning storage pool to a file storage pool in the file device; and   a file system creating unit configured to create the file system by using the file storage pool.   
     
     
         8 . The apparatus of  claim 7 , further comprising:
 a capacity change request receiving unit configured to receive a request to change a capacity of the file system; and   a thin provisioning storage pool capacity changing unit configured to change the capacity of the file system by changing a capacity of the thin provisioning storage pool in response to the request.   
     
     
         9 . The apparatus of  claim 7 , further comprising:
 a physical storage space addition prompting unit configured to prompt a user to add a new physical storage space in the block device in response to an amount of data in the file system exceeding a pre-defined proportion of the block-based physical storage space.   
     
     
         10 . The apparatus of  claim 7 , further comprising:
 a thin provisioning storage pool shrink prompting unit configured to perform at least one of the following in response to the thin provisioning storage pool being shrunk to be less than a pre-defined threshold:   refusing a shrinking request; and   prompting a user to delete data in the file system.   
     
     
         11 . The apparatus of  claim 7 , further comprising:
 a storage volume creating unit configured to create a plurality of storage volumes for the mapping according to the thin provisioning storage pool.   
     
     
         12 . The apparatus of  claim 11 , wherein a total capacity of the plurality of storage volumes is equal to a maximum capacity of the thin provisioning storage pool. 
     
     
         13 . A computer program product for managing a file system of a unified storage system, the unified storage system comprising a file level and a block level having a block-based physical storage space, the computer program product comprising:
 one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising instructions for:   creating a thin provisioning storage pool in the block level;   mapping the thin provisioning storage pool to a file storage pool in the file level; and   creating the file system by using the file storage pool.   
     
     
         14 . The computer program product of  claim 13 , wherein the program instructions comprise instructions for:
 receiving a request to change a capacity of the file system; and   in response to the request, changing the capacity of the file system by changing a capacity of the thin provisioning storage pool.   
     
     
         15 . The computer program product of  claim 13 , wherein the program instructions comprise instructions for:
 prompting a user to add a new physical storage space in the block level in response to an amount of data in the file system exceeding a pre-defined proportion of the block-based physical storage space.   
     
     
         16 . The computer program product of  claim 13 , wherein, in response to the thin provisioning storage pool being shrunk to be less than a pre-defined threshold, the program instructions comprise instructions for performing at least one of the following:
 refusing a shrinking request; and   prompting a user to delete data in the file system.   
     
     
         17 . The computer program product of  claim 13 , wherein the program instructions comprise instructions for creating a plurality of storage volumes for the mapping according to the thin provisioning storage pool. 
     
     
         18 . The computer program product of  claim 17 , wherein a total capacity of the plurality of storage volumes is equal to a maximum capacity of the thin provisioning storage pool.