Newbie Datacenter SAN/NAS Question
Posted on 2011-03-23
A partner and I are in the initial phase of putting together a small data center. We are leasing some rack space at a local telco. We have put in a vmWare solution using Open-E DSS v6 for our SAN. It is a linux solution and seems to be working ok. We have implemented Multi Path I/O and using two 1 GB Ethernet Adapters for the MPIO. Our SAN is currently a Dell Power Edge 2900 with about 1.5 TB of data. The drives are 15K SAS Drives.
Here are my questions...
1) How many Servers, from a IOPS can I put on the SAN?
2) With a SAN do i have to use SAS drives or will SATA work fine?
3) We want to setup a file server and have a NAS for the file shares.(Cheaper than the SAN) what is the best way to provide redundancy?
My initial thought was to have two Netgear ReadyNAS appliance and present the NAS iSCSI channel to the vmWare. So present two I iSCSI datastores to vmWare. Do this and then present the virtual disks to Windows and let windows do a RAID1. I think I would get lots of overhead from iSCSI and then the RAID overhead.
Solution 2 was to use DFS and just present the drives as two different drives with a direct iSCSI connection to the Windows 2008 servers. There are so many ways to do this I am hoping that someone has a best practice for something like this. We currently have no fault tolorance and want to plan for this as well.