ceph / rocksdb

[Marcus Watts <mwatts@redhat.com>]

So, about that rocksdb thing.

Rocksdb ships with 2 build systems:
	cmake		- windows only
	make based	- everything else

The makefile is very "retro".  Um.  Let's just leave it there.

The cmake part was more interesting; the main problem it had
was it was *way* too windows specific.  Which is actually kinda
hard to do, since that's just what cmake wasn't supposed to be.

Building rocksdb (-g) takes about 1g of build tree space,
and running "make check" on it takes about half an hour.
I really don't want to slow down my ceph builds this way,
so rather than make rocksdb with the rest of ceph, I would
much rather it be packaged / installed separately.

So I put together:
a set of changes to build rocksdb with cmake on linux
an rpm .spec file to build it for fedora.

Rpms (source & amd64) can be found here:
	http://people.redhat.com/mwatts/rocksdb/
and a git repo with the cmake changes here,
	https://github.com/mdw-at-linuxbox/rocksdb

The cmake parts could certainly still use more work; I haven't
tested this and it will probably need changes on anything other
than x86_64, such as certainly any non-gcc/non-linux platform.

					-Marcus Watts