It is also useful to mention that you can set the noout flag when doing
maintenance of any given length needs to exceeds the 'mon osd down out
interval'.
$ ceph osd set noout
** no re-balancing will happen **
$ ceph osd unset noout
** normal re-balancing rules will resume **
- Mike Dawson
I think my wording was a bit misleading in my last message. Instead of
no re-balancing will happen, I should have said that no OSDs will be
marked out of the cluster with the noout flag set.
- Mike
On 12/21/2013 2:06 PM, Mike Dawson wrote:
It is also useful to mention that you can set the
David Clarke writes:
Not directly related to Ceph, but you may want to investigate kexec[0]
('kexec-tools' package in Debian derived distributions) in order to
get your machines rebooting quicker. It essentially re-loads the
kernel as the last step of the shutdown procedure, skipping over the
On 12/19/13, 7:51 PM, Sage Weil wrote:
If it takes 15 minutes for one of my servers to reboot is there a risk
that some sort of needless automatic processing will begin?
By default, we start rebalancing data after 5 minutes. You can adjust
this (to, say, 15 minutes) with
mon osd down
What impact does rebooting nodes in a ceph cluster have on the health of
the ceph cluster? Can it trigger rebalancing activities that then have
to be undone once the node comes back up?
I have a 4 node ceph cluster each node has 11 osds. There is a single
pool with redundant storage.
If it
On Thu, 19 Dec 2013, John-Paul Robinson wrote:
What impact does rebooting nodes in a ceph cluster have on the health of
the ceph cluster? Can it trigger rebalancing activities that then have
to be undone once the node comes back up?
I have a 4 node ceph cluster each node has 11 osds. There
On 20/12/13 13:51, Sage Weil wrote:
On Thu, 19 Dec 2013, John-Paul Robinson wrote:
What impact does rebooting nodes in a ceph cluster have on the health of
the ceph cluster? Can it trigger rebalancing activities that then have
to be undone once the node comes back up?
I have a 4 node ceph
So is it recommended to adjust the rebalance timeout to align with the time to
reboot individual nodes?
I didn't see this in my pass through the ops manual but maybe I'm not looking
in the right place.
Thanks,
~jpr
On Dec 19, 2013, at 6:51 PM, Sage Weil s...@inktank.com wrote:
On
