Re: [MooseFS-Users] Real experiences from real users

[Gandalf C. <gan...@gm...>]

Il giorno mar 22 mag 2018 alle ore 14:39 Marco Milano <mar...@gm...>
ha scritto:
> What is wrong with saying that if you want compression use ZFS and turn
on compression?
> ZFS is available on both Linux and FreeBSD.
> Why does compression need to be on the MooseFS level ?

ZFS on Linux is not "native", it's an external project. It require a DKMS
or Ubuntu, that provide an already built module as default.
If you only need compression, forcing users to use ZFS is like shooting
fish in barrel.
ZFS requires tons of (ECC) RAM that could be used for something else (ie,
putting mfsmaster on chunkservers),
and, on average, is slower than other FS due to checksumming (already done
by MooseFS, thus it's a
redundant check)

I'm not against ZFS (probably i'll use ZFS in my cluster), but if the only
used feature is compression, having it in MooseFS is not a bad idea.

In this case, MooseFS will be really hardware and software indipendent.

Obviously, i'm talking after reading that adding compression "is quite
simple to implement".