Five different ways of accomplishing the same thing.
REDUNDANCY and reasonable availability for a reasonable price.
Cloud
Hardware: 6x Servers
Software: MS Windows Hyper-V cluster, or Ubuntu Linux Cloud
(Too much hardware.)
Mirror
Hardware: 2x Servers
Software: MS Windows Cluster or Red Hat Linux GlusterFS
Internet/Datacenter
|
|
|
--------------------
| |
------------| Switch |-----------
| | | |
| -------------------- |
| |
| |
| |
| |
Network Card 1 (eth0) Network Card 1 (eth0)
| |
-------------------- --------------------
| | | |
| Server 1 | | Server 2 |
| | | |
-------------------- --------------------
| |
Network Card 2 (eth1) Network Card 2 (eth1)
| |
| |
| Direct 10GbE |
-------------------------------------------SAN
Hardware: 2x Servers with redundant SAN (Like Dell PV3220)
Internet/Datacenter
|
|
|
--------------------
| |
------------| Switch |-----------
| | | |
| -------------------- |
| |
| |
| |
| |
Network Card 1 (eth0) Network Card 1 (eth0)
| |
-------------------- --------------------
| | | |
| Server 1 | | Server 2 |
| | | |
-------------------- --------------------
| |
SAS SAS
| |
| ------------------ |
| | SAN | |
-------------------------------------------NAS
Hardware: 2x Servers with 2x NAS
Internet/Datacenter
|
|
|
--------------------
| |
------------| Switch |-----------
| | | |
| -------------------- |
| |
| |
| |
| |
Network Card 1 (eth0) Network Card 1 (eth0)
| |
-------------------- --------------------
| | | |
| Server 1 | | Server 2 |
| | | |
-------------------- --------------------
| |
10GB 10GB
| |
| ------------------ |
| | NAS | |
-------------------------------------------
| |
| |
| ------------------ |
| | NAS | |
-------------------------------------------
Spare
Spare: 2x Servers
Internet/Datacenter
|
|
|
--------------------
| |
| Switch |
| |
--------------------
|
|
|
--------------------
| |
| Server 1 |
| |
--------------------
--------------------
| |
| Spare Server |
| |
--------------------Thank you: serverfault.com/question… for the info!