Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-10 Thread Philip Brown
uot; Sent: Tuesday, December 10, 2019 5:40:22 AM Subject: Re: [ceph-users] sharing single SSD across multiple HD based OSDs It just uses LVM to create a bunch of LVs. It doesn't actually create separate partitions on the block devices. You can run the command and it will give you a previe

Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-10 Thread Marc Roos
AM Subject: Re: [ceph-users] sharing single SSD across multiple HD based OSDs The way I did this was to use: ceph-volume lvm batch /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf etc Where you just list all of the block devices

Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-10 Thread Daniel Sung
did the partitioning look like? > > - Original Message - > From: "Daniel Sung" > To: "Nathan Fish" > Cc: "Philip Brown" , "ceph-users" < > ceph-users@lists.ceph.com> > Sent: Tuesday, December 10, 2019 1:21:36 AM > Subject: R

Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-10 Thread Philip Brown
Interesting. What did the partitioning look like? - Original Message - From: "Daniel Sung" To: "Nathan Fish" Cc: "Philip Brown" , "ceph-users" Sent: Tuesday, December 10, 2019 1:21:36 AM Subject: Re: [ceph-users] sharing single SSD across multip

Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-10 Thread Daniel Sung
The way I did this was to use: ceph-volume lvm batch /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf etc Where you just list all of the block devices you want to use in a group. It will automatically determine which devices are SSD and then automatically partition it for you and share it am

Re: [ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-09 Thread Nathan Fish
You can loop over the creation of LVs on the SSD of a fixed size, then loop over creating OSDs assigned to each of them. That is what we did, it wasn't bad. On Mon, Dec 9, 2019 at 9:32 PM Philip Brown wrote: > > I have a bunch of hard drives I want to use as OSDs, with ceph nautilus. > > ceph-vol

[ceph-users] sharing single SSD across multiple HD based OSDs

2019-12-09 Thread Philip Brown
I have a bunch of hard drives I want to use as OSDs, with ceph nautilus. ceph-volume lvm create makes straight raw dev usage relatively easy, since you can just do ceph-volume lvm create --data /dev/sdc or whatever. Its nice that it takes care of all the LVM jiggerypokery automatically. but..