Know thy data center Tier
Posted on Wednesday, July 29, 2009
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A day does not go by when we can't learn something new. Love the "What I learned today" posts that Mike Laverick has been doing.
So here is what I learnt today, the right order for DC tiers.
Tier 1 is the lowest and tier 4 is the highest. The tiers are allocated to the different portions of the infrastructure such as:
Some details to show the differences1.
Tier 1 - Basic data center with no redundancy
- architectural
- security
- mechanical
- electrical
- communications
Some details to show the differences1.
Tier 1 - Basic data center with no redundancy
- No redundancy
- Susceptible to disruptions from both planned and unplanned activity
- May or may not have raised floor, UPS or generator
- Shut down likely to perform preventive maintenance
- Annual downtime of 28.8 hours
- Single distribution path with redundant components
- Less susceptible to disruption from both planned and unplanned activity
- Single path for power and cooling disruption, includes redundant components (N+1)
- Includes raised floor, UPS and generator
- Annual downtime of 22 hours
- Enable planned activity without disrupting computer hardware operation, but unplanned events will still cause disruption
- Multiple power and cooling distribution paths but with only one path active, includes redundant components (N+1)
- Includes raised floor and sufficient capacity and distribution to carry load on one path while performing maintenance on the other
- Annual downtime of 1.6 hours
- Planned activity does not disrupt critical load and data center can sustain at least one worst-case unplanned event with no critical load impact
- Multiple active power and cooling distribution paths, includes redundant components (2(N+1)), such as 2 UPS each with N+1 redundancy
- Annual downtime of 0.4 hours
Today I got a peek at a T4 center and some space that housed the legal black hats / spies. Some nice high end stuff. I bet it was just a decoy. They probably have the things everywhere! You would not want to stick the Cloud next door to that, I bet they have cameras facing outwards and can read data streams by watching the flashing lights on the disks. Well if they can't I bet someone wrote a PhD thinking about how you might.
