I have to put together a storage system for 20TB - 50TB data with a CentOS head server.
Can someone explain the best way to provision and configure the storage?
The data will be almost exclusively read-only, with growth of 3-5TB/yr.
I will have a SAS-connected SAN with either 1TB or 2TB disks. The SAN has a max of 16 disks in a RAID5 (or RAID6) array, so I assume I'll need more than 1 array at the storage level.
This means several LUNS presented to the OS.
Assuming I use the 1TB disks, and create 3 different RAID 5 arrays, I'll have 45TB of usable space.
Do I create smaller LUNS to present to the OS, and LVM to create a single large storage pool?
Does the entire Volume Group max out at 16TB? or is each LV a max of 16TB?