ocfs2.txt 1.9 KB

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  1. OCFS2 filesystem
  2. ==================
  3. OCFS2 is a general purpose extent based shared disk cluster file
  4. system with many similarities to ext3. It supports 64 bit inode
  5. numbers, and has automatically extending metadata groups which may
  6. also make it attractive for non-clustered use.
  7. You'll want to install the ocfs2-tools package in order to at least
  8. get "mount.ocfs2" and "ocfs2_hb_ctl".
  9. Project web page: http://oss.oracle.com/projects/ocfs2
  10. Tools web page: http://oss.oracle.com/projects/ocfs2-tools
  11. OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
  12. All code copyright 2005 Oracle except when otherwise noted.
  13. CREDITS:
  14. Lots of code taken from ext3 and other projects.
  15. Authors in alphabetical order:
  16. Joel Becker <joel.becker@oracle.com>
  17. Zach Brown <zach.brown@oracle.com>
  18. Mark Fasheh <mark.fasheh@oracle.com>
  19. Kurt Hackel <kurt.hackel@oracle.com>
  20. Sunil Mushran <sunil.mushran@oracle.com>
  21. Manish Singh <manish.singh@oracle.com>
  22. Caveats
  23. =======
  24. Features which OCFS2 does not support yet:
  25. - sparse files
  26. - extended attributes
  27. - shared writable mmap
  28. - loopback is supported, but data written will not
  29. be cluster coherent.
  30. - quotas
  31. - cluster aware flock
  32. - cluster aware lockf
  33. - Directory change notification (F_NOTIFY)
  34. - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease)
  35. - POSIX ACLs
  36. - readpages / writepages (not user visible)
  37. Mount options
  38. =============
  39. OCFS2 supports the following mount options:
  40. (*) == default
  41. barrier=1 This enables/disables barriers. barrier=0 disables it,
  42. barrier=1 enables it.
  43. errors=remount-ro(*) Remount the filesystem read-only on an error.
  44. errors=panic Panic and halt the machine if an error occurs.
  45. intr (*) Allow signals to interrupt cluster operations.
  46. nointr Do not allow signals to interrupt cluster
  47. operations.
  48. atime_quantum=60(*) OCFS2 will not update atime unless this number
  49. of seconds has passed since the last update.
  50. Set to zero to always update atime.