[PVE-User] Snapshot rollback slow

Marco Gaiarin gaio at sv.lnf.it
Wed Aug 29 19:09:35 CEST 2018


Mandi! Marcus Haarmann
  In chel di` si favelave...

> However, the rollback of snapshot took > 1 hour and during this timeframe, the whole cluster 
> was reacting veeeeery slow. 

AFAIK this is a 'feature' of ceph (again AFAIK fixed/better handled in
recent ceph version and on bluestore): a deletion (of a volume or a
snapshot rollback) trigger a 'write amplification'.

In older ceph version there's some workarounds...


Sorry for be not so precise, look at ceph mailing list archive for more
precise info...

-- 
dott. Marco Gaiarin				        GNUPG Key ID: 240A3D66
  Associazione ``La Nostra Famiglia''          http://www.lanostrafamiglia.it/
  Polo FVG   -   Via della Bontà, 7 - 33078   -   San Vito al Tagliamento (PN)
  marco.gaiarin(at)lanostrafamiglia.it   t +39-0434-842711   f +39-0434-842797

		Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA!
      http://www.lanostrafamiglia.it/index.php/it/sostienici/5x1000
	(cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA)


More information about the pve-user mailing list