Le dimanche 22 juillet 2018 à 09:51 -0400, Satish Patel a écrit : > I read that post and that's why I open this thread for few more > questions and clearence, > > When you said OSD doesn't come up what actually that means? After > reboot of node or after service restart or installation of new disk? > > You said we are using manual method what is that? > > I'm building new cluster and had zero prior experience so how can I > produce this error to see lvm is really life saving tool here? I'm > sure there are plenty of people using but I didn't find and good > document except that mailing list which raising more questions in my > mind. When I had to change a few drives manually, copying the old contents over, I noticed that the logical volumes are tagged with lots of information related to how they should be handled at boot time by the OSD startup system. These LVM tags are a good standard way to add that meta-data within the volumes themselves. Apparently, there is no other way to add these tags that allow for bluestore/filestore, SATA/SAS/NVMe, whole drive or partition, etc. They are easy to manage and fail-safe in many configurations. > Sent from my iPhone > > > On Jul 22, 2018, at 6:31 AM, Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx> > > wrote: > > > > > > > > I don’t think it will get any more basic than that. Or maybe this? > > If > > the doctor diagnoses you, you can either accept this, get 2nd > > opinion, > > or study medicine to verify it. > > > > In short lvm has been introduced to solve some issues of related > > to > > starting osd's (which I did not have, probably because of a > > 'manual' > > configuration). And it opens the ability to support (more future) > > devices. > > > > I gave you two links, did you read the whole thread? > > https://www.mail-archive.com/ceph-users@xxxxxxxxxxxxxx/msg47802.htm > > l > > > > > > > > > > > > -----Original Message----- > > From: Satish Patel [mailto:satish.txt@xxxxxxxxx] ; > > Sent: zaterdag 21 juli 2018 20:59 > > To: ceph-users > > Subject: Why lvm is recommended method for bleustore > > > > Folks, > > > > I think i am going to boil ocean here, I google a lot about this > > topic > > why lvm is recommended method for bluestore, but didn't find any > > good > > and detail explanation, not even in Ceph official website. > > > > Can someone explain here in basic language because i am no way > > expert so > > just want to understand what is the advantage of adding extra layer > > of > > complexity? > > > > I found this post but its not i got lost reading it and want to see > > what > > other folks suggesting and offering in their language > > https://www.mail-archive.com/ceph-users@xxxxxxxxxxxxxx/msg46768.htm > > l > > > > ~S > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Nicolas Huillard _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |