Hi,
On 20 Jun 2008, at 07:23, Matthew Dillon wrote:
[...] I will be making one final media change on Friday and then
HAMMER
development will go into testing & bug fixing mode until the
release.
This last media change will fix mtime and atime storage. At the
moment
mtime/atime updates require generating UNDO records and, needless
to say,
they're expensive. I will consider my options tomorrow but I
think I
am going to just not include those fields in the CRC so they can be
updated asynchronously, without any UNDO's. [etc]
That's harmless for atime, but you really want mtime to be properly
synchronised with the last data update (and to stay that way across an
undo). Ideally, timestamp data records and hold mtime as a reference
to the last one updated (or something like that).
--
Bob Bishop +44 (0)118 940 1243
[EMAIL PROTECTED] fax +44 (0)118 940 1295
