Mike Morris wrote:
John McClain - Sun Microsystems, Inc. wrote:
My vote is to remove logstore altogether and do it for AR1.
+1 -- good candidate for re-inclusion in a later release.
Probably should have been a bit more explicit before, but at the time I
didn't have quite enough energy to write a longer message....
In my mind this would be a one way trip for logstore, it wouldn't be be
coming back.
The problem with logstore is that it depends on Progress Software's
ObjectStore PSE Pro. At build time you need a post processor that comes
with PSE Pro (though there might be alternatives here), and at runtime
you need their library, pro.zip. Getting access to either requires a
license from Progress Software, which in turn generally requires $$$.
Because of this I don't see having a dependency on PSE Pro was being an
option for River.
Since 2.0, Outrigger's store has been plugable, and there is a second
store implementation in the starter kit, "snapstore". Snapstore does not
depend on any external libraries. Snapstore doesn't scale as well as
logstore as the number of entries in the space goes up, but storing lots
and lots of entries has never been Outrigger's design center, so in
context this may not be a big limitation.
It is worth noting that because Outrigger caches the entire data set in
memory (hence the note that "storing lots and lots of entries has never
been Outrigger's design center" above) writing a new store isn't that
hard. If snapstore turns out not to be acceptable I can think at least
of 3 other options for new stores that we could pursue. There are also
some improvements we should make to snapstore that while they wouldn't
make it scale better in the total number of entries, they would
substantially improve its multi-threaded performance and cut the latency
of commits dramatically.
Don't know if this changes anyones mind.
--
John McClain [EMAIL PROTECTED]
Sun Microsystems, Inc.
Burlington, MA
And it is that way today. We are tricked by hope into starting
companies, beginning books, immigrating to this country and investing
in telecom networks. The challenges turn out to be tougher than we
imagined. Our excessive optimism is exposed. New skills are demanded.
But nothing important was ever begun in a prudential frame of mind.
- David Brooks
