> On December 1, 2015 at 10:22 AM Eduard Ahmatgareev <e.ahmatgareev at gmail.com> > wrote: > > > we use first cluster build 3.4 version, and second cluster with only ceph > storage on 4.0 version. > > Your mechanism external lock the lvm cluster storage working only at 4 > version? no, that also works with 3.4