DRBD and ceph with out cluster

[jagan]

Hi guys,


I am new to proxmox I have some small doubts can anyone please......... clear my doubts

Q1: is it possible to configure drbd with 2 nodes with out cluster?

Q2: is it possible to configure ceph pool with 3 nodes with out cluster?

Q3: is it possible to create ceph pool with 3 pmx nodes (2nd disk-osds) and 1 nas (freenas) server i.e creating the ceph pool using both osds and nas storage?if possible how to add nas server to the pmx cluster?

Q4: is it possible to configure drbd using more than 2nodes(>2nodes)?

Q5: How the datd redundancy happening in ceph pool i.e how to know data was storing on which osd?

Q6: i am created one vm using local storage , i can see the image of that vm under /var/lib/vz/images/vmid.qcow2 and i am created one more vm using lvm (2nd disk) in this case where that image stored and how to find that image



please............ answer these questions and thanks in advance

 

[udo]

Hi guys,


I am new to proxmox I have some small doubts can anyone please......... clear my doubts

Q1: is it possible to configure drbd with 2 nodes with out cluster?

Hi,
yes, but it's make no sense because you can't use live-migration.
The only benefit, is the data safety (stored on another node) - but it's dangerous, because both nodes can write to the same image from different VMs (without cluster you can have more than one VM with the same VMID).

Q2: is it possible to configure ceph pool with 3 nodes with out cluster?

I'm not sure with pveceph, but the standard ceph can be installed.
It's the same like the answer in Q1 (can be dangerous).

Q3: is it possible to create ceph pool with 3 pmx nodes (2nd disk-osds) and 1 nas (freenas) server i.e creating the ceph pool using both osds and nas storage?if possible how to add nas server to the pmx cluster?

ceph on BSD?? Perhaps.

Q4: is it possible to configure drbd using more than 2nodes(>2nodes)?

AFAIK there was an announcement from the drbd-team about more than 2 nodes, but I'm sure that not with active/active/(active).

Q5: How the datd redundancy happening in ceph pool i.e how to know data was storing on which osd?

long story - but without many OSD be sure, your data will be on all OSDs (4MB chunks)

Q6: i am created one vm using local storage , i can see the image of that vm under /var/lib/vz/images/vmid.qcow2 and i am created one more vm using lvm (2nd disk) in this case where that image stored and how to find that image



please............ answer these questions and thanks in advance

man lvm
lvs

Udo