Considering it a showstopper when you admit one graph earlier that
you're already running with a patched tree seems a bit overblown,
perhaps? The tree is now gold and patches may no longer be applied?
Derrick
On Jun 17, 2010, at 3:30 AM, Rainer Toebbicke <[email protected]>
wrote:
Russ Allbery schrieb:
I'm aware of the following (largish) things that we want to
deprecate or
remove:
* --enable-fast-restart and --enable-bitmap-later are earlier
attempts to
solve the problem that is solved in a more complete way by demand
attach. Demand attach will be available in 1.6 but not enabled by
default. These two options will conflict with demand-attach; in
other
words, you won't be able to enable either of them and demand
attach at
the same time.
At the point at which we make demand attach the default, rather than
optional behavior, I believe we should remove the code for these two
flags. I think that should be for either 1.10 or 2.0 based on
experience with running 1.6 in production. In the meantime,
please be
aware that most of the developers don't build with those flags by
default and the code is not heavily tested.
I'm concerned about removing the code for fast-restart and bitmap-
later just because DAFS becomes the default.
We've been running with our own "on-demand-attach" since 5-6 years
in 1.2 and 1.4 with perfect satisfaction, and given its size and
impact on the code I'd rather wait until DAFS gets a decent share of
debugging before considering to move to it.
On the other hand, salvaging a complete file server just because of
a crash is not an option, and removing anything that's required for
it, be it fast-restart, bitmap-later or whatever, becomes a show-
stopper!
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=-=-=-=-=
Rainer Toebbicke
European Laboratory for Particle Physics(CERN) - Geneva, Switzerland
Phone: +41 22 767 8985 Fax: +41 22 767 7155
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