Hi Eneko, I was considering 1 GB per TB, but I will switch that to 4 GB per TB to consider blue storage. Regarding the number of devices, Will 2 disks per node help with the cluster speed? My ultimate goal is to provide support to a second project which will be an OpenStack deployment. Oliver Audrey, I prefer to invest in hardware rather than renting it, since I want to create a private cloud. Thanks! Ignacio Ocampo
On Mar 9, 2020, at 4:12 AM, Eneko Lacunza <elacunza@binovo.es> wrote: Hola Ignacio,
El 9/3/20 a las 3:00, Ignacio Ocampo escribió: Hi team, I'm planning to invest in hardware for a PoC and I would like your feedback before the purchase:
The goal is to deploy a *16TB* storage cluster, with *3 replicas* thus *3 nodes*.
System configuration: https://pcpartpicker.com/list/cfDpDx ($400 USD per node)
Some notes about the configuration:
- 4-core processor for 4 OSD daemons - 8GB RAM for the first 4TB of storage, that will increase to 16GB of RAM when 16TB of storage. - Motherboard: - 4 x SATA 6 Gb/s (one per each OSD disk) - 2 x PCI-E x1 Slots (1 will be used for an additional Gigabit Ethernet) - 1 x M.2 Slots for the host OS - Ram can increase up-to 32 GB, and another SATA 6b/s controller can be added on PCI-E x1 for growth up to *32TB*
As noted, the plan is to deploy nodes with *4TB* and gradually add *12TB* as needed, memory also should be increased to *16GB* after *8TB* threshold. Edit Questions to validate before the purchase
1. Does the hardware components make sense for the *16TB* growth projection?
2. Is it easy to gradually add more capacity to each node (*4TB* each time per node)? Thanks for your support!
You may find that having only one disk per node, will make the storage quite slow.
I think you're low on RAM to use bluestore, specially when adding new disks, please check: https://docs.ceph.com/docs/master/start/hardware-recommendations/
It is easy to add additional disks, yes.
You may also want to try some solution for easier deployment for such a small cluster, I can recommend Proxmox VE (https://www.proxmox.com) but there are others.
Cheers and good luck Eneko
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