Hello, We have MDT with 2.5.0 with zfs 6.2 and OST and clients are 2.4.0, installed from zfsonlinux repository: http://archive.zfsonlinux.org/epel/zfs-release-1-3.el6.noarch.rpm We recognize that on heavy load the OST gives slow writes mesages. On clietns we see very slow performance on MDS: "lfs find" performs very slow. Is it save to upgrade running OST from 2.4.0 to 2.5? OST is about 50TB, recovery from the tapes will take week which is not an option. Thanks, Arman. _______________________________________________ Lustre-discuss mailing list Lustre-discuss-aLEFhgZF4x6X6Mz3xDxJMA@public.gmane.org http://lists.lustre.org/mailman/listinfo/lustre-discuss