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- Professional_File_System abstract "The Professional File System is a filesystem originally developed commercially for the Amiga, it is now distributed on Aminet with a 4-clause BSD license. PFS tends to perform very well, due to the simplicity of design. Compatible successor of Ami-FileSafe.The device is split into two main areas. At the beginning of the device is the metadata section, which consists of a root block, and a generic array of blocks that can be allocated to store metadata. The rest of the device is another contiguous generic array of blocks that can be allocated to store data. The metadata section usually uses a few percent of the device, depending on the size of the device.The metadata is stored as a tree of single blocks in the metadata section. The entire directory structure is recorded in the metadata, so the data section purely contains data from files. The metadata describes the location of data in files with extents of blocks, which makes the metadata quite compact.When a metadata update occurs, the system looks at the block containing the metadata to be changed, and copies it to a newly allocated block from the metadata section, with the change made, then it recursively changes the metadata in the block that points to that block in the same way. This way, eventually the root block needs to be changed, which causes the atomic metadata update.The filesystem is reasonably good at keeping files unfragmented, although there is a defragmentation tool available which will work on an online filesystem.It was the first filesystem to introduce the concept of the Recycle Bin natively at filesystem-level to the Amiga, holding the last few deleted files in a hidden directory on the disk root.PFS version 5.3 was developed in C and a small portion of assembly code by Michiel Pelt.".
- Professional_File_System thumbnail Pfs3.png?width=300.
- Professional_File_System wikiPageExternalLink PFS3.
- Professional_File_System wikiPageExternalLink pfs-amiga.sourceforge.net.
- Professional_File_System wikiPageExternalLink pfsdefrag.
- Professional_File_System wikiPageExternalLink Ami_File_Safe.
- Professional_File_System wikiPageID "844979".
- Professional_File_System wikiPageRevisionID "595703882".
- Professional_File_System attributes "filenote".
- Professional_File_System compression "No".
- Professional_File_System dateRange "--01-01".
- Professional_File_System dateResolution "50.0".
- Professional_File_System datesRecorded "modification".
- Professional_File_System developer "Michiel Pelt".
- Professional_File_System encryption "No".
- Professional_File_System fileSystemPermissions "Amiga permissions, multiuser permissions".
- Professional_File_System filenameCharacterSet "All bytes except NULL, ':' and '/'".
- Professional_File_System fullName "Professional File System".
- Professional_File_System hasPhotoCollection Professional_File_System.
- Professional_File_System introductionDate "1995".
- Professional_File_System introductionOs AmigaOS.
- Professional_File_System maxFilenameSize "107".
- Professional_File_System maxVolumeSize "137.0".
- Professional_File_System name "PFS".
- Professional_File_System os AmigaOS.
- Professional_File_System os MorphOS.
- Professional_File_System partitionId "'PFS\1', 'muAF', 'AFS\1'".
- Professional_File_System singleInstanceStorage "No".
- Professional_File_System subject Category:AmigaOS.
- Professional_File_System subject Category:Amiga_software.
- Professional_File_System subject Category:Disk_file_systems.
- Professional_File_System subject Category:MorphOS_software.
- Professional_File_System type Abstraction100002137.
- Professional_File_System type Arrangement105726596.
- Professional_File_System type ClassificationSystem105727220.
- Professional_File_System type Cognition100023271.
- Professional_File_System type DiskFileSystems.
- Professional_File_System type FileSystem105732614.
- Professional_File_System type PsychologicalFeature100023100.
- Professional_File_System type Structure105726345.
- Professional_File_System comment "The Professional File System is a filesystem originally developed commercially for the Amiga, it is now distributed on Aminet with a 4-clause BSD license. PFS tends to perform very well, due to the simplicity of design. Compatible successor of Ami-FileSafe.The device is split into two main areas. At the beginning of the device is the metadata section, which consists of a root block, and a generic array of blocks that can be allocated to store metadata.".
- Professional_File_System label "Professional File System".
- Professional_File_System sameAs m.03ggcv.
- Professional_File_System sameAs Q7247965.
- Professional_File_System sameAs Q7247965.
- Professional_File_System sameAs Professional_File_System.
- Professional_File_System wasDerivedFrom Professional_File_System?oldid=595703882.
- Professional_File_System depiction Pfs3.png.
- Professional_File_System homepage pfs-amiga.sourceforge.net.
- Professional_File_System isPrimaryTopicOf Professional_File_System.