So I have a 2 node (will be a 3 node soon) cluster running Proxmox 3.2. I'm currently hosting ~15 VM's, using a shared NFS share on a different server. I want to implement Ceph, and am planning to start with a single 512GB SSD in each of my 3 nodes.
1) Does Ceph replicate data across all the drive, like a thee way mirror? i.e., with a single 512GB SSD in each, will I only have a total of 512GB total storage available?
2) Is the replication (assuming this is the correct term to use) configurable? i.e., can I configure a two-way mirror with 3 512GB drives, giving me a total of 768GB of available storage?
3) Can I expand my Ceph array(?) by adding more drives, or would I have to create a new array(?) when I add more drives?
4) I plan to start with a single 512GB drive in each box, but would later like to add additional 512GB drives to each server (each server is a Dell R610 with 6 x 2.5" bays, and using 2 10K SAS drives in hardware RAID1 for proxmox install -- leaving 4 bays for Ceph storage drives). If I add additional drives later, can I do one drive at a time, or would I have to add one drive to each server at the same time? i.e., can I have 2 512GB SSDs in one server, while the other 2 servers only have 1 512GB SSD, and (assuming I can do a two-way mirror) have ~1TB available storage?
Hope my questions make sense, and thanks in advance for your assistance! I've been playing with Proxmox for about a week now and am really enjoying it (tonight I am migrating everything from my Hyper-V 2012 box to Proxmox, which will free up my third Proxmox node), and I'm looking forward to really setting things up nicely in my home lab.
1) Does Ceph replicate data across all the drive, like a thee way mirror? i.e., with a single 512GB SSD in each, will I only have a total of 512GB total storage available?
2) Is the replication (assuming this is the correct term to use) configurable? i.e., can I configure a two-way mirror with 3 512GB drives, giving me a total of 768GB of available storage?
3) Can I expand my Ceph array(?) by adding more drives, or would I have to create a new array(?) when I add more drives?
4) I plan to start with a single 512GB drive in each box, but would later like to add additional 512GB drives to each server (each server is a Dell R610 with 6 x 2.5" bays, and using 2 10K SAS drives in hardware RAID1 for proxmox install -- leaving 4 bays for Ceph storage drives). If I add additional drives later, can I do one drive at a time, or would I have to add one drive to each server at the same time? i.e., can I have 2 512GB SSDs in one server, while the other 2 servers only have 1 512GB SSD, and (assuming I can do a two-way mirror) have ~1TB available storage?
Hope my questions make sense, and thanks in advance for your assistance! I've been playing with Proxmox for about a week now and am really enjoying it (tonight I am migrating everything from my Hyper-V 2012 box to Proxmox, which will free up my third Proxmox node), and I'm looking forward to really setting things up nicely in my home lab.
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