Changelog

Last Updated on Thursday, 19 June 2008 06:24 Written by Administrator Thursday, 01 May 2008 10:12

1. IN PROGRESS:
   • The long asked for ./configure script is finally there!
   • Updated cf_extract: you can again recover you files from an unmounted compFUSEd fs
   • Bug fix: multi-threading deadlock in cf_read()
   • Bug fix: multi-threading deadlock in cf_open()
   • Bug fix: fix crash in fs scanning code
   • Bug fix: fix crash when deleting symlink
   • Performance improvements
     • Unbuffered decompression of read() operations
     • Unbuffered compression of write() operations
   • Bug fix: segmentation fault issue on x86_64 systems
   • Bug fix: incorrectly marked uncompressible chunks (please don't ask..)
   • Bug fix: new "minimum size for compression" parameter (please don't ask..)
   • NEW: large file support
     • bigger files (>4G)
     • file system stats adjusted too
     • adjust header and to allow larger amount of data
     • this changes the format of the files, making the old one's INCOMPATIBLE!
   • NEW:changed plugins dependency on compression libs
     • you no longer need to link against libz/libbz2/liblzo/...
   • NEW: configuration scheme (again)
     • simpler config file
     • auto generated default config for new users
     • more suited for mobility e.g. compFUSEd on USB sticks
   • NEW: more flexible parsing of mount point parameter
   • NEW: mount script for easier fstab mounting
   • NEW: new plugin API
     • stateful plugins are possible
     • plugin for out-of-order writing of compressed data chunks
   • NEW: a compFUSEd manual/HOWTO
2. LATEST: cf-GISMO-200712321.tgz
   • new "minimum size for compression" parameter
     • avoid compressing small files/chunks
     • new configuration file entry
   • Bug fix: incorrectly marked uncompressible chunks
   • Bug fix: code to persist the filesystem info between mounts
   • graceful handling of compression lib failure
   • dynamically sized file mapping (internal mapping)
4. cf-GISMO-200705823.tgz:
   • New configuration setup
     • Slightly modified file format (smb.conf inspired)
     • Different location
     • More suited for "real deployment"
   • New compression plugin using lzo2.x
     • Set USE_LZO2=1 in the Makefile
   • cf_truncate completely implemented
   • Bug fix in zlib compression plugin
   • Bug fix in Makefile
   • Additional debugging targets in Makefile
   • Bug fix in cf_chunk_write()
   • Bug fix in cf_chunk_read()
   • Bug fix in fs stats related code
   • Major code clean up
     
     • Too much to list
   • Full rewrite of chunk writer plugin
   • Second chunk writer plugin (somewhat smarter)
5. cf-GISMO-200623912.tgz
   • New code base:
   • new file format (incompatible with previous releases)
   • plugins for compression and file format
   • chunkwise compression of the data
   • low memory requirements
   • currently no caching
6. cf-200605821.tgz
   • Makefile changes:
     • defaults concerning compression libs:
       USE_ZLIB=1
       USE_BZIP2=1
       USE_LZO=1
     • new debug and debugmax
   • compFUSEd stops immediately if compression lib is not supported
   • small correction in cf_extract utility
   • cf_init() now rebuilds fs information if filesystem data is absent (umount not clean)
   • cf_fsinfo utility can now perform complete fs scan, reports a bit more information
   • Added a new keyword in the configuration file to force a fs scan at startup if desired. See documentation
7. cf-200605021.tgz
   • Updated to comply with new FUSE 2.5.X API: YOU MUST UPGRADE to this version of fuse!
   • bug fix in cf_getattr() for files which not compressed by compFUSEd (exclude). If the entry was cached the file size of zero was incorrectly returned.
   • Numerous fixes to the statfs related code to correctly compute the amount of data on the filesystem
   • Protected the code of paths which exceed the maximum path length of 4096 characters. Some configure scripts exceeds the MAX_PATH length on purpose. Solved now
   • Small strcmp hack: store reversed path strings to speed up strcmp in case of mismatch by putting the "most significant characters in front". Ex: /cf_back/file -> elif/kcab_fc/
   • Makefile restructured:
     • Build a cf library (libcf.a)
     • You can compile compFUSEd with support for fewer compression libs now (for example only ZLIB)
     • More variables to specify the include path and library path
8. cf-200601721.tgz
   • bug fix in cf_rename() Occured when destination of rename was still cached
9. cf-200535513.tgz
   • Really wrote something in the HOWTO.txt file ;)
   • bug fix in mknod() code; I forgot FIFO files exist (named pipes)
   • bug fix in caching code; got invalid entries for files that will not be compressed
   • bug fix in caching code; cache disabling got broken
   • bug fix in cf_map_init(); forgotten mutex initialization (not critical)
   • bug fix in cf_map_addname() code; map resizing forgot init (again..)
   • much needed file utilities:
     • cf_inspection backend_dir/filename (compression rate)
     • cf_extract -i compressed_filename -o decompressed_filename (decompress file)
     • cf_fsinfo backened_dir
   • Adding logging functionalities, ie. log file (good for debugging...)
     • new keyword log (or LOG) in config file
     • no log entry in config sends log info to the screen
   • bzip2 bad performance: slow, little size gain compared to zlib
     • NO SOLUTION FOUND: is still bad
     • lower setting with little effect (workmem=100k, workfactor=0)
     Adding targets to Makefile to compile with more or less debugging code
   • statfs() code was patched, now return the size of data present on the compFUSEd filesystem
10. cf-200531111.tgz
    • Threading reworked to allow more fine grain locking of buffers. Compression and decompression are done without blocking the central data structure.
11. cf-200530910.tgz
    • General
      • added code for the extended attributes
      • buffer duplication is now avoided for multiple open()'s for the same file
      • some internal API changes
      • code cleanup
    • Compression
      • decompression is done on open() making the code simpler
      • changed bzip2 compression settings: mem requirements should be lower and speed higher
    • Threading
      • reworked multi-threading (work well now please, pretty please)
      • locking is still "fat" if things do not break anymore smaller lock granularity will be considered
      • handling of multiple file opens with read-write lock
    • Config/options
      • backend directory (path) is converted automatically in an absolute path is necessary to avoid problem when running in daemon mode
      • added caching to avoid frequent reread from disk (should help for big compiles). No LRU policy yet
      • cache size and time to live in cache time parameters added to configuration file
      • config file can now be either in working directory or in user's home dir if not found in cwd
      • config file parsing accepts keywords in both upper or lower case (EXCLUDE = exclude)
      • "compression none" can be used to deactivate compression in config file (debugging)
12. cf-200528614.tgz : DO NOT USE multi-threading is not working properly
    • fixes mem leak issues
    • introduces multi-threading
    • File header changed; need to copy files first (using old version) or you will loose the data.
13. cf-200528312.tgz
    • fixes an error in the blacklist code.
    • The "not to be compressed" files are now NOT stored in memory like the ones that are compressed (good for portage distfiles ;) ).