Thanks a lot guys. I’ll try to do as you told me.
Best Regards Matteo This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. > Il giorno 20 set 2016, alle ore 12:20, Vincent Godin <vince.ml...@gmail.com> > ha scritto: > > Hi, > > In fact, when you increase your pg number, the new pgs will have to peer > first and during this time, a lot a pg will be unreachable. The best way to > upgrade the number of PG of a cluster (you 'll need to adjust the number of > PGP too) is : > > Don't forget to apply Goncalo advices to keep your cluster responsive for > client operations. Otherwise, all the IO and CPU will be used for the > recovery operations and your cluster will be unreachable. Be sure that all > these new parameters are in place before upgrading your cluster > stop and wait for scrub and deep-scrub operations > ceph osd set noscrub > ceph osd set nodeep-scrub > > set you cluster in maintenance mode with : > ceph osd set norecover > ceph osd set nobackfill > ceph osd set nodown > ceph osd set noout > > wait for your cluster not have scrub or deep-scrub opration anymore > upgrade the pg number with a small increment like 256 > wait for the cluster to create and peer the new pgs (about 30 seconds) > upgrade the pgp number with the same increment > wait for the cluster to create and peer (about 30 seconds) > (Repeat the last 4 operations until you reach the number of pg and pgp you > want > > At this time, your cluster is still functionnal. > > Now you have to unset the maintenance mode > ceph osd unset noout > ceph osd unset nodown > ceph osd unset nobackfill > ceph osd unset norecover > > It will take some time to replace all the pgs but at the end you will have a > cluster with all pgs active+clean.During all the operation,your cluster will > still be functionnal if you have respected Goncalo parameters > > When all the pgs are active+clean, you can re-enable the scrub and deep-scrub > operations > ceph osd unset noscrub > ceph osd unset nodeep-scrub > > Vincent > > > > -- > Questo messaggio e' stato analizzato con Libra ESVA ed e' risultato non > infetto. > Clicca qui per segnalarlo come spam. > <http://mx01.enter.it/cgi-bin/learn-msg.cgi?id=AF49540335.A9E0F> > Clicca qui per metterlo in blacklist > <http://mx01.enter.it/cgi-bin/learn-msg.cgi?blacklist=1&id=AF49540335.A9E0F>
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