I realised this operation with no impact using this way : 1- I duplicated the rule used by my pools and give it the number of the new corresponding rule in the new crushmap 2- I set the noout 3- I set the new crushmap 4- I unset the noout
Everything was fine (i already had set max_backfill and other parameters which are a "must have" on a production cluster Vincent <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=T-000-800-A> Cet e-mail a été envoyé depuis un ordinateur protégé par Avast. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=T-000-800-A> <#DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2> 2016-01-20 17:58 GMT+01:00 Robert LeBlanc <rob...@leblancnet.us>: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > I'm not aware of a way of slowing things down other then modifying > osd_max_backfills, osd_backfill_scan_{min,max}, and > osd_recovery_max_activate as mentioned in [1]. The nature of injecting > a new CRUSH map us usually the result of several changes and I will do > this to prevent several restarts of backfills when a number of changes > needs to happen. I don't think setting noout will do anything for you > because your OSDs will not be going down with a CRUSH change. I didn't > realize that you could change the CRUSH rule on an existing pool, but > it is in the man page. You learn something new everyday. > > > [1] https://www.mail-archive.com/ceph-users@lists.ceph.com/msg26017.html > - ---------------- > Robert LeBlanc > PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 > > > On Wed, Jan 20, 2016 at 7:11 AM, Vincent Godin wrote: > > Hi, > > > > I need to import a new crushmap in production (the old one is the default > > one) to define two datacenters and to isolate SSD from SATA disk. What is > > the best way to do this without starting an hurricane on the platform ? > > > > Till now, i was just using hosts (SATA OSD) on one datacenter with the > > default rule so i create a new rule in the new crushmap to do the same > job > > on one datacenter on a defined SATA chassis. Here is the process I'm > going > > to follow but i really need your advice : > > > > 1 - set the noout flag > > 2 - import the new crushmap > > 3 - change the rule number for the existing pool to the new one > > 4 - unset the noout flag > > 5- pray ... > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > -----BEGIN PGP SIGNATURE----- > Version: Mailvelope v1.3.3 > Comment: https://www.mailvelope.com > > wsFcBAEBCAAQBQJWn7y8CRDmVDuy+mK58QAARAkQAKYdhhwzKAyCm4Fwv+4O > aWjLRqoqaJHVgKHZ8LigNlesFzxeB00nEsysUDsU/AoAzR+4RPYuFKneosYV > HY8Uri4QmChG0JAy/Dh/FffpH2LUmQJ2broo2p31V2ljLIgQl+Hd+8cf9hG/ > muZ5DChfj4cRMmoWCcEltt6Oc23O1zGhi5VQRh1LY60jAA/EuVL0XZBLiMcU > Pio7RwH1ZrlJQnuorXEiZY31cgNRrd4UzdQlEMXBRPzU1aj0Tgr2mHikCv59 > 7Fi7iI0VQLI9LD4HpX84pBahFbHamrw1EI37QaYXJrEdRQmht1YIQJpD2eso > 3K3fcuCsfKYCweRydpPAWlzZfeo400CN1qunwM0Bxcm54rvRTju81YzY1yv7 > TH7DGphuOeOBRp+7utQzZ2uil1iTDMqNSMJ5tdPBWETqzxULuJKGX1uzCM/Y > zeE9wEfrKax3agYyi9cCqPTT9KhYB8BsPFAobO53a2j/c1dnqvIA0ToqEUyO > kqB0Ze7rG8ZOLKgRkj/ACqC14RnMBBVR3DtmQ6Lfs3aiokUx5IzAp8pR5JI4 > J32uCAUVSuUXTmnrozFaxgLgel0HM9XqPiOeXlp2gfuukeb+ENfzNfJk2zTn > cwdf3HyjapRXtZKaHa6XEhoTuqznKDbOAdTlyxlvm/SfR84BW00HbXxAPa/G > /sFU > =sN8w > -----END PGP SIGNATURE----- >
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