Abstract: A write operation storing data in a first storage device is duplicated to a first replication file. A set of differences between a first version of the first replication file determined at a first time and a second version of the first replication file determined at a second time is determined, the set of differences comprising a set of results of duplicated write operations occurring between the first time and the second time. At a second file system, storage of the set of differences in a second storage device is caused, creating a duplicate in the second storage device of the data stored in the first storage device.

Abstract: A processor-implemented method for copying a source file to a destination file using a virtual memory manager (VMM) of a computer operating system is provided. The method includes receiving, by the VMM, a request to copy the source file to a destination file. The method further provides that based on the status of the virtual page, performing at least one of moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A computer system for copying a source file to a destination file using a virtual memory manager of a computer operating system is provided. One or more processors, one or more non-tangible computer-readable storage devices, and a plurality of program instructions are included. The program instructions provide for receiving, by the virtual memory manager, a request to copy the source file to a destination file. The program instructions further provides that based on the status of the virtual page, performing at least one moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A computer program product for copying a source file to a destination file using a virtual memory manager of a computer operating system is provided. The computer program product includes receiving, by the virtual memory manager, a request to copy the source file to a destination file. The computer program product further provides that based on the status of the virtual page, performing at least one moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A computer program product for copying a source file to a destination file using a virtual memory manager of a computer operating system is provided. The computer program product includes receiving, by the virtual memory manager, a request to copy the source file to a destination file. The computer program product further provides that based on the status of the virtual page, performing at least one moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A processor-implemented method for copying a source file to a destination file using a virtual memory manager (VMM) of a computer operating system is provided. The method includes receiving, by the VMM, a request to copy the source file to a destination file. The method further provides that based on the status of the virtual page, performing at least one of moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A computer system for copying a source file to a destination file using a virtual memory manager of a computer operating system is provided. One or more processors, one or more non-tangible computer-readable storage devices, and a plurality of program instructions are included. The program instructions provide for receiving, by the virtual memory manager, a request to copy the source file to a destination file. The program instructions further provides that based on the status of the virtual page, performing at least one moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: A processor-implemented method for copying a source file to a destination file using a virtual memory manager (VMM) of a computer operating system is provided. The method includes receiving, by the VMM, a request to copy the source file to a destination file. The method further provides that based on the status of the virtual page, performing at least one of moving the virtual page to the destination file, copying the virtual page to the destination file, reading the virtual page into memory, and ignoring the virtual page.

Abstract: Metadata is extracted from a filesystem of a first system. The filesystem includes user data and the metadata. The metadata relates to the user data and is corrupt. Just the just the metadata extracted from the filesystem is transmitted from the first system to a second system. The second system receives the transmitted metadata, and loads this metadata to create a dummy namespace reflecting the metadata. The second system debugs the metadata, and prepares a patch based on this debugging. Execution of the patch allows the metadata to be repaired so that the metadata is no longer corrupt. The patch is transmitted from the second system to the first system for execution at the first system to allow the metadata to be repaired at the first system so that the metadata is no longer corrupt at the first system.

Abstract: A method includes determining, by a processor, that a write request indicates a clone file that was cloned from a file in a first fileset. The clone file is of a second fileset and a clustered file system comprises the first fileset and the second fileset. A data block of the clone file affected by the write request is determined. The method includes determining that the data block at a current location cannot be modified. In response to a determination that the data block at the current location cannot be modified, the method includes implementing the write request with respect to the data block at a different location and indicating that the data block at the different location can be modified for subsequent write requests that indicate the clone file.

Abstract: Mechanisms, in a data processing system comprising a processor and an address translation cache, for caching address translations in the address translation cache are provided. The mechanisms receive an address translation from a server computing device to be cached in the data processing system. The mechanisms generate a cache key based on a current valid number of mirror copies of data maintained by the server computing device. The mechanisms allocate a buffer of the address translation cache, corresponding to the cache key, for storing the address translation and store the address translation in the allocated buffer. Furthermore, the mechanisms perform an input/output operation using the address translation stored in the allocated buffer.

Abstract: Mechanisms, in a data processing system comprising a processor and an address translation cache, for caching address translations in the address translation cache are provided. The mechanisms receive an address translation from a server computing device to be cached in the data processing system. The mechanisms generate a cache key based on a current valid number of mirror copies of data maintained by the server computing device. The mechanisms allocate a buffer of the address translation cache, corresponding to the cache key, for storing the address translation and store the address translation in the allocated buffer. Furthermore, the mechanisms perform an input/output operation using the address translation stored in the allocated buffer.

Abstract: A cluster server manages allocation of free blocks to cluster clients performing writes in a clustered file system. The cluster server manages free block allocation with a free block map and an in-flight block map. The free block map is a data structure or hardware structure with data that indicates blocks or extents of the clustered file system that can be allocated to a client for the client to write data. The in-flight block map is a data structure or hardware structure with data that indicates blocks that have been allocated to clients, but remain in-flight. A block remains in-flight until the clustered file system metadata has been updated to reflect a write performed to that block by a client. After a consistency snapshot of the metadata is published to the storage resources, the data at the block will be visible to other nodes of the cluster.

Abstract: A cluster server manages allocation of free blocks to cluster clients performing writes in a clustered file system. The cluster server manages free block allocation with a free block map and an in-flight block map. The free block map is a data structure or hardware structure with data that indicates blocks or extents of the clustered file system that can be allocated to a client for the client to write data. The in-flight block map is a data structure or hardware structure with data that indicates blocks that have been allocated to clients, but remain in-flight. A block remains in-flight until the clustered file system metadata has been updated to reflect a write performed to that block by a client. After a consistency snapshot of the metadata is published to the storage resources, the data at the block will be visible to other nodes of the cluster.

Abstract: A method includes determining, by a processor, that a write request indicates a clone file that was cloned from a file in a first fileset. The clone file is of a second fileset and a clustered file system comprises the first fileset and the second fileset. A data block of the clone file affected by the write request is determined. The method includes determining that the data block at a current location cannot be modified. In response to a determination that the data block at the current location cannot be modified, the method includes implementing the write request with respect to the data block at a different location and indicating that the data block at the different location can be modified for subsequent write requests that indicate the clone file.

Abstract: After a clone file is created from a file, a write request targeting the clone file can be handled. It is determined that the write request indicates the clone file that was cloned from a file in a first fileset. The clone file is of a second fileset and a clustered file system comprises the first fileset and the second fileset. A data block of the clone file affected by the write request is determined. It is then determined that the data block at a current location cannot be modified. The write request is implemented with respect to the data block at a different location. It is indicated that the data block at the different location can be modified for subsequent write requests that indicate the clone file.

Abstract: Embodiments include a computer program product and an apparatus for cloning files across different filesets and maintaining the clone files. After a clone file is created from a file, a write request targeting the clone file can be handled. It is determined that the write request indicates the clone file that was cloned from a file in a first fileset. The clone file is of a second fileset and a clustered file system comprises the first fileset and the second fileset. A data block of the clone file affected by the write request is determined. It is then determined that the data block at a current location cannot be modified. The write request is implemented with respect to the data block at a different location. It is indicated that the data block at the different location can be modified for subsequent write requests that indicate the clone file.

Abstract: A client node on which a file system is mounted can be configured to efficiently handle content access requests after a snapshot is created. The client node can maintain generation numbers at a data block, a file, and a fileset level to determine whether a data block is part of a snapshot generation and consequently whether the data block is writable in a current generation. Data block mappings and write access permissions associated with the data blocks need not be revoked at the client node prior to creating the snapshot. Cached data block mappings can be accessed to identify data blocks for servicing a read request. The data block can be updated in place if the data block is not part of the snapshot generation. The write request can be serviced at a new data block if the data block is part of the snapshot generation.

Abstract: A cluster server manages allocation of free blocks to cluster clients performing writes in a clustered file system. The cluster server manages free block allocation with a free block map and an in-flight block map. The free block map is a data structure or hardware structure with data that indicates blocks or extents of the clustered file system that can be allocated to a client for the client to write data. The in-flight block map is a data structure or hardware structure with data that indicates blocks that have been allocated to clients, but remain in-flight. A block remains in-flight until the clustered file system metadata has been updated to reflect a write performed to that block by a client. After a consistency snapshot of the metadata is published to the storage resources, the data at the block will be visible to other nodes of the cluster.

Abstract: After a clone file is created from a file, a write request targeting the clone file can be handled. It is determined that the write request indicates the clone file that was cloned from a file in a first fileset. The clone file is of a second fileset and a clustered file system comprises the first fileset and the second fileset. A data block of the clone file affected by the write request is determined. It is then determined that the data block at a current location cannot be modified. The write request is implemented with respect to the data block at a different location.