Friday night I was somewhat more successful with autoflush in that
my disks were emptied correctly, albeit very slowly.  The new
amflush took ~24 hours to complete, a factor of 3 times more slowly
than 2.5.1p3.  Further, my tape usage was very poor, in 2.5.2 I
see:

USAGE BY TAPE:
  Label           Time      Size      %    Nb    Nc
  genepi042       5:03 37759264k   57.8    19     0
  genepi043       9:35 71714592k  109.7    23     0
  genepi044       8:13 61836128k   94.7    47     0
  genepi045       3:17 24587904k   37.6     1     0

Note the first tape was only half used.  As far as I can tell,
autoflush in 2.5.2 uses a new tape for the old dumps, not filling
up the first.  I never had this problem with previous versions:

USAGE BY TAPE:
  Label           Time      Size      %    Nb    Nc
  genepi035       2:33 54701152k   83.8    40     0
  genepi036       3:29 74139808k  113.4    28     0
  genepi051       2:36 55659520k   85.1    22     0

In short, amflush, although working now, seems to have performance
problems.

Steve
-- 
Steven J. Backus                        Computer Specialist
University of Utah                      E-Mail:  steven.backus AT utah DOT edu
Biomedical Informatics                  Alternate:  backus AT math.utah DOT edu
391 Chipeta Way -- Suite D150           Office:  801.587.9308
Salt Lake City, UT 84108-1266           http://www.math.utah.edu/~backus