Backups and case insensitive filesystems

[Kenneth Kalmer]

Hi everyone

More of a note/bug report/fyi...

My datomic backup on Linux has various directory names in values that are
case sensitive, like "0e" & "0E". When I rsync to macOS it all gets mixed
together in lowercase directories. This might purely be due to how rsync
lists files, but doesn't matter. Also, restores work just fine as far as I
can tell (I have restored many times in the past few months).

I noticed this when I first ran rsync with the "--delete" flag, in an
attempt to free up some space on my machine. Intuitively it makes sense
that no files will ever be removed, because of the immutability, but it was
a bit of a head scratcher for me when I did try and restore *that* backup
missing a ton of files and it failed.

I'm not sure if there is a fix (assuming it is broken in the first place),
but I think this must at least be documented somewhere for others to find
in the future if the same happens to them. Hopefully having this message
archived helps someone else in the interim.

For completeness sake, here are some versions of the remote system:

* datomic-pro-0.9.5561.59 (seen with datomic-free-0.9.5561.54 too)
* java version "1.8.0_144", Java(TM) SE Runtime Environment (build
1.8.0_144-b01), Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed
mode)
* Ubuntu 16.04.3 LTS

Thanks!