Re: [ceph-users] Help with setting device-class rule on pool without causing data to move

2018-12-31 Thread Eric Goirand
Hi David, CERN has provided with a python script to swap the correct bucket IDs (default <-> hdd), you can find it here : https://github.com/cernceph/ceph-scripts/blob/master/tools/device-class-id-swap.py The principle is the following : - extract the CRUSH map - run the script on it => it

Re: [ceph-users] OSDs with primary affinity 0 still used for primary PG

2018-02-15 Thread Eric Goirand
Hello Teun, see below .. On 02/15/2018 11:52 AM, Teun Docter wrote: Hi David, Thanks for explaining that, makes sense. (Though I guess the docs aren't very clear on that, but ok.) I have a follow up question on your suggestion to modify the crush map though. I've seen a few examples on how

Re: [ceph-users] erasure code profile

2017-09-23 Thread Eric Goirand
Hello Luis, To find what EC profile would be best in your environment, you would need to know : - how mans disks or hosts failure would you accept : I understood from your email that you want to be able to loose one room, but won't you need a bit more, such as loosing 1 disk (or 1 host) in