Re: [ceph-users] Kernel RBD hang on OSD Failure

2015-12-12 Thread Ilya Dryomov
On Sat, Dec 12, 2015 at 6:37 PM, Tom Christensen wrote: > We had a kernel map get hung up again last night/this morning. The rbd is > mapped but unresponsive, if I try to unmap it I get the following error: > rbd: sysfs write failed > rbd: unmap failed: (16) Device or resource busy > > Now that t

Re: [ceph-users] OSD:s failing out after upgrade to 9.2.0 on Ubuntu 14.04

2015-12-12 Thread Josef Johansson
Thanks for sharing your solution as well! Happy holidays /Josef On 12 Dec 2015 12:56 pm, "Claes Sahlström" wrote: > Just to share with the rest of the list, my problems have been solved now. > > > > I got this information from Sergey Malinin who had the same problem: > > 1. Stop OSD daemons on a

Re: [ceph-users] OSD:s failing out after upgrade to 9.2.0 on Ubuntu 14.04

2015-12-12 Thread Claes Sahlström
Just to share with the rest of the list, my problems have been solved now. I got this information from Sergey Malinin who had the same problem: 1. Stop OSD daemons on all nodes. 2. Check the output of "ceph osd tree". You will see some of OSDs showing as "up" - shut them down using "ceph osd do

Re: [ceph-users] Monitors - proactive questions about quantity, placement and protection

2015-12-12 Thread Wido den Hollander
On 12/11/2015 08:12 PM, Alex Gorbachev wrote: > This is a proactive message to summarize best practices and options > working with monitors, especially in a larger production environment > (larger for me is > 3 racks). > > I know MONs do not require a lot of resources, but prefer to run on SSDs >