dave@imax.com (Dave Martindale) (07/19/90)
In a previous message, I stated that dump was still necessary because GNU tar could not do incremental dumps. As several people have pointed out, GNU tar *does* do incremental dumps. I must plead guilty to temporary insanity. I had confused the public domain tar written by John Gilmore <gnu@toad.com> (which I use), with the genuine GNU tar. Sorry about misleading people. Dave Martindale
glenn@csri.toronto.edu (Glenn Mackintosh) (07/24/90)
dave@imax.com (Dave Martindale) writes: >In a previous message, I stated that dump was still necessary because GNU >tar could not do incremental dumps. As several people have pointed out, >GNU tar *does* do incremental dumps. I must plead guilty to temporary >insanity. I had confused the public domain tar written by John Gilmore ><gnu@toad.com> (which I use), with the genuine GNU tar. However, tar does have the problem that it fills in holes in files. This means that databses that fit on your disk but contain chunks that don't actually have blocks assigned to them suddenly get much bigger, perhaps even too big for your disk if the holes are very big, if you try and recover it from a tar'ed tape. Glenn Mackintosh Univ. of Toronto CSNET/ARPA: glenn@eecg.{toronto.edu,utoronto.ca} CDNNET: glenn@eecg.toronto.cdn BITNET: glenn@eecg.utoronto.bitnet (may not work from all sites) UUCP: uunet!utai!eecg!glenn
alpetrof@volcano.Berkeley.EDU (Al Petrofsky) (08/07/90)
In article <10163@brazos.Rice.edu> glenn@csri.toronto.edu (Glenn Mackintosh) writes:
However, tar does have the problem that it fills in holes in files. This
means that databses that fit on your disk but contain chunks that don't
actually have blocks assigned to them suddenly get much bigger, perhaps
even too big for your disk if the holes are very big, if you try and
recover it from a tar'ed tape.
The June 1990 GNUS Bulletin says GNU tar includes "the ability to archive
sparse files." I haven't tried it, but it sounds like they've got all the
bases covered.
Al Petrofsky
alpetrof@ocf.berkeley.edu