Ok, given the changes to the storage arena I’ve been working on a revised “Tiering system” to incorporate all of the levels of data…importance?
My version of Storage Tiering is (or should be) as follows:
- Tier-1 – Symmetrix/Replicated – High Performance/Criticial Data
- Tier-2 – Symmetrix/NonReplicated – High Performance/Non-Criticial Data
- Tier-3 – Symmetrix/SATA/Replicated – High-Medium Performance/Critical Data
- Tier-4 – Symmetrix/SATA/NonReplicated – High-Medium Performance/Non-Critical Data
- Tier-5 – Clariion/FC/Replicated – Medium Performance/Critical Data
- Tier-6 – Clariion/FC/NonReplicated – Medium Performance/Non-Critical Data
- Tier-7 – Clariion/SATA/Replicated – Low Performance/Critical Data
- Tier-8 – Clariion/SATA/NonReplicated – Low Performance/Non-Critical Data
- Tier-9 – CelerraNAS/Replicated – Network Attached/Critical Data
- Tier-10 – CelerraNAS/NonReplicated – Network Attached/Non-Criticial Data
- Tier-11 – Atmos – Network Attached / Low Performance
- Tier-12 – Centerra (Content Addressable Storage) – Low Performance Archive / Highly Available
- Tier-13 – Primary Tape-In-Library (Automatic loading on demand via HSM)
- Tier-14 – Primary Tape-Out-Of-Library (Manual Intervention Required)
“Critical Data” vs. “Non-Critical Data” is simply a matter of how long you can be without the data should a failure or accidental deletion occur. As all data is available in Tier8/9 storage (in theory).
I’ve also considered using Tier1/Tier1B to describe DMX storage vs. Clariion storage, given that there is a LOT of overlap in performance characteristics these days…
Oh, and iSCSI would be somewhere between 10 and 13….