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Graham Perrin

Noob help with creating a file system - MacFUSE | Google Groups - 0 views

groups.google.com/...162c8e7407cb01de

activity performance foreign native error file system Finder

shared by Graham Perrin on 19 Nov 08 - Cached
  • very picky that your file system is returning the proper errors
    • Graham Perrin
      Graham Perrin on 19 Nov 08
       
      Finder expects errors that are proper.
  • accesses to files in a directory when there was no contentsOfDirectoryAtPath: ca
  • contentsOfDirectoryAtPath: will be called frequently
  • ...4 more annotations...
  • think beyond the Finder
  • Finder, other applications, and even parts of the OS that would would not expect may be requesting directory contents or file attributes on your file system at any time. They will even do this for files and directories that don't exist
  • Working well with the Finder is not an easy task
  • behaving as much like a "standard" file system as possible
Graham Perrin

OPTIONS - - 0 views

code.google.com/...OPTIONS

2009 Filesystem in Userspace

shared by Graham Perrin on 17 Jan 09 - Cached
  • MacFUSE provides a flexible and adaptive mechanism to handle extended attributes (including things such as Finder Info, Resource Forks, and ACLs)
  • extended attributes as Apple Double (._) files
  • all or only some extended attributes
  • ...14 more annotations...
  • To properly support ACLs, a user-space file system must correctly handle the com.apple.system.Security extended attribute
  • MacFUSE supports Mac OS X access control lists (ACLs)
  • With auto_xattr, the kernel will /always/ use ._ files
  • MacFUSE limits volume access to the user that mounted the volume
  • blanket denial is a first line of defense
  • allow_other to turn the blanket denial off
  • not a means of distributed file sharing
  • SFTP is merely a utility
  • create a true distributed file system based on MacFUSE
  • nolocalcaches makes the operating system work in an abnormal mode
  • relevant code paths may not have been well tested
  • overhead
  • file operations could end up being /much/ slower
  • SFTP provides no synchronization or locking
Graham Perrin

FAQ - macfuse - Google Code - Frequently Asked Questions (and Answers) - 0 views

code.google.com/...FAQ

Finder performance 2008 Filesystem in Userspace

shared by Graham Perrin on 14 Nov 08 - Cached
Graham Perrin liked it
  • I mounted a MacFUSE volume but I don't see a volume icon on the Desktop
  • I mounted a MacFUSE volume but I don't see a volume icon in the Finder's sidebar
  • sshfs isn't meant to replace things such as NFS, AFP, and SMB
  • ...5 more annotations...
  • a substitute when you don't have any remote file sharing access to a computer, but you do have sftp access
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      A rich experience, with which users of Apple Finder and Mac OS X are accustomed, can not be guaranteed within the limitations of a protocol such as FTP.
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      Hint: Finder does very much more than simply transfer files. Much of the Finder experience, which users (naturally) take for granted, is thanks to extensive use of extended attributes and metadata.
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      Users of FTP, SFTP and SHH services: please, pay attention! The best marriage of Apple Finder and Mac OS X to a remote file system is: Apple Filing Protocol (AFP).
  • MacFUSE allows access to a volume only to the user who mounted the volume. All other users, including the superuser is denied access
  • nontrivial user-space file systems can still be complex, and their performance/behavior can depend upon numerous factors besides MacFUSE itself
  • When in doubt, feel free to post your questions on the macfuse group
  • MacFUSE itself isn't a distributed remote file system
Graham Perrin

NTFS-3G: Extended Attributes - 0 views

pagesperso-orange.fr/...extend-attr.html

ea NTFS

shared by Graham Perrin on 26 May 09 - Cached
Graham Perrin liked it
  • information which cannot be stored in the file
  • Extended attributes are properties
  • optionally set to files or directories
  • ...23 more annotations...
  • with variations
  • Windows, Linux, Solaris, MacOSX
  • On Linux, specifically, four categories of extended attributes have been defined
  • user : to record properties defined by applications
  • names of the extended attributes must be prefixed
  • Examples of extended attribute names
  • stable ntfs-3g supports the user name space
  • some Linux distributions do not support the extended attribute interface
  • commands for getting or setting the extended attributes are system dependent
  • extended attributes in user name space are stored on NTFS as alternative data streams
  • The following sections describe how to access a few NTFS internal data as extended attributes
  • NTFS Attributes
  • miscellaneous flags associated with a file or directory
  • Only eight flags can be changed
  • NTFS use reparse data to define special actions before opening
  • reparse data of a file or directory is mapped to an extended attribute
  • translated into ownership, permissions and Posix ACLs parameters
  • NTFS ACLs are used to control access
  • NTFS ACL of a file or directory is mapped to an extended attribute
  • EFS is the methodology used in NTFS to deal with encrypted files
  • decryption information, the EFS Info, which contains the key, encrypted
  • decryption information is mapped to an extended attribute
  • encryption and compression are not compatible
  • Graham Perrin on 26 May 09
     
    Annotated link: http://www.diigo.com/0619k
Graham Perrin

message from conversation 'Controlling the number of fuse threads' - 0 views

groups.google.com/...1585b8031aa08e17

mount file system activity performance

shared by Graham Perrin on 16 Nov 08 - Cached
  • the moment you mount something on OS X, the operating system can throw a lot at the file system
Graham Perrin

MACFUSE_FS_SSHFS - macfuse - Google Code - The SSH File System for MacFUSE - 0 views

code.google.com/...MACFUSE_FS_SSHFS

shared by Graham Perrin on 15 Dec 08 - Cached
  • See ChangeLog file in sshfs source
    • Graham Perrin
      Graham Perrin on 15 Dec 08
       
      I find http://sourceforge.net/project/shownotes.php?release_id=634615&group_id=121684 but I 'm not sure whether that is the ChangeLog file that's intended.
Graham Perrin

SSHFS - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/SSHFS

shared by Graham Perrin on 26 May 09 - Cached
Graham Perrin liked it
  • SSHFS (SSH Filesystem)
  • allows access to a remote file system where files and directories are available via SFTP
  • Compatibility and limitations
Graham Perrin

Finder, xattrs and appledouble files - MacFUSE | Google Groups - 0 views

groups.google.com/...b96e8427da713573

2009 2009-11 2009-11-18 MacFUSE Mac OS X Finder (software) Hierarchical File System

shared by Graham Perrin on 20 Nov 09 - Cached
  • problem is in attempting to drag-n- drop (or copy-n-paste) files from the HFS+
  • haven't found a combination of default_permissions, defer_permissions, noappledouble and noapplexattr options (or absence of all of them) that works
  • problems that you are experiencing are almost certainly down to something else
  • ...2 more annotations...
  • if you don't implement xattrs MacFuse will work
  • If you can repeat a problem with the loopback then it may be a problem with MacFUSE - if not the problem is yours
Graham Perrin

Finder browsing is slow with sshfs - MacFusion-devel | Google Groups - 0 views

groups.google.com/...f703cb724ec029c

performance MacFUSE Finder SSHFS

shared by Graham Perrin on 16 Nov 08 - Cached
  • # nontrivial user-space file systems can still be complex, and # their performance/behavior can depend upon numerous factors # besides MacFUSE itself.
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