Thanks for your help! I am very appreciate^^ 2011/4/11 Gregory Farnum <gregory.farnum@xxxxxxxxxxxxx>: > On Thu, Apr 7, 2011 at 7:16 PM, doki74216@xxxxxxxxx <doki74216@xxxxxxxxx> wrote: >> Hi, >> >> MY current version is v0.24.3, I want to upgrade version to v 0.26. >> And my Linux OS is Fedora 14. >> >> I want to know my step is correctly or not? >> Here is my upgraded steps: >> 1) We stop the current system (v0.24.3)by "/etc/init.d/ceph -a stop " >> 2) We start to download the newest version(v0.26) and install it. >> 3) Then we mkcephfs (by "mkcephfs -c /etc/ceph/ceph.conf --allhosts --mkbtrfs >> -k keyring.bin") and start it(by " /etc/init.d/init-ceph -a -c >> /etc/ceph/ceph.conf start"). >> >> But there's a problem I met when I was started the Ceph. >> The system stops running and it shows the error messages as shown below: >> >> >> === mds.0 === >> Starting Ceph mds0 on host4... >> ** WARNING: Ceph is still under heavy development, and is only suitable for ** >> ** testing and review. Do not trust it with important data. ** >> terminate called after throwing an instance of 'ceph::buffer::end_of_buffer' >> what(): buffer::end_of_buffer >> bash: line 1: 24409 Segmentation fault (core dumped) >> /usr/local/bin/cmds -i 0 -c /tmp/ceph.conf.5135 >> failed: 'ssh host4 /usr/local/bin/cmds -i 0 -c /tmp/ceph.conf.5135 ' > > Hmm. That's not something I'd expect to see on startup, especially > with a fresh filesystem. Can you get the backtrace from gdb? > >> The second question is when we upgrate the ceph successfully. >> Is there any tool to transfer the existing data (which from the old >> ceph system) to the newest system? >> Because we thought the data in the older version(eg. 0.24.3) is >> slightly different from the newer version(eg. 0.26)? >> I want to know the data will be still correctly? > The on-disk format doesn't change too often and we try and keep it > backwards compatible -- you should be able to start up new daemons on > old data and in the worst case they will slowly upgrade it. If this > doesn't work then there's a bug somewhere. > So, no, you should not lose your data. > > However, in the list of steps you took, you ran mkcephfs, and that did > kill all your data (I thought there were several warnings about this > when using the tool?). Running mkcephfs is only necessary when > creating the filesystem, not when upgrading it! > -Greg > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
