[lustre-devel] [PATCH 41/80] staging: lustre: lmv: separate master object with master stripe

[Oleg Drokin]

> On Feb 11, 2018, at 6:50 PM, NeilBrown <neilb at suse.com> wrote:
> 
> Maybe - as you suggest in another email - it is due to some
> client/server incompatibility.  I guess it is unavoidable with an fs
> like lustre to have incompatible protocol changes.  Is there any
> mechanism for detecting the version of other peers in the cluster and
> refusing to run if versions are incompatible?

Yes, client and server exchange “feature bits” at connect time
and only use the subset of features that both can understand.

Bye,
    Oleg