Would like to know meaning about tier1, tier2, tier3,

[amfpg]

Hi all,

is there any common reference to read about tier1, tier2 technical term?

data center tier, capacity management tier, application tier

thx

[Wh33ly]

Have a look at Five Tier Storage Model - Wikibon it gives a nice summary to start with and give you a bit of global view what the differences are.

[amfpg]

Thanks Wh33ly will look into your link.

[JarryG]

When talking about datacenters, Telecommunications Industry Association published ANSI/TIA-942 (telecommunications infrastructure standard for data-centers) wich describes various levels/tiers in much details. But afaik, this is not the only standard used. I.e. "Uptime Institute" described it differently...

[amfpg]

thanks JarryG

is there any applicable tier1, tier2 other than data center or telecommunications?

sometimes i am confuse when i read some document or ppt in here, the talk about tier1, tier2 but when i try to google sometime the explanation between one and other different

[ChintanWaghmare]

Well, in generalized term its for categorizing your offerings based on your Business Criticality .. that might not be limited to just the Datacenter or Telecommunications but can be anything.. a Service,  a Product, a Hardware like Storage, Server etc  or your even customer Support.

For eg.. if you are supporting / hosting a business critical service/ application that needs to be available 24x7 then that would be classified as Tier1 service/application. If another application can sustain a small downtime but is an important one that can be classified as Tier 2 service or offering whilst if you have an Development/Test env for which Downtime doesn't matter then it would be a Tier 3 - 4... so and so forth

Another example say for example .. for Tier 1 VM.. a service provider would be offering best in class enterprise hardware like FC SAN, and  Highend Memory and power full CPU..
for its Tier 3 - 4 VM offering it might be a NAS storage, with bit low Ram and CPU offering.

or If you are referring Tier1 , Tier 2 to Datacenter Tiers then here the Tier refers to Redundancy and Availability .. Higher the Tier more the Redundancy and Availability.  Like for Tier 1 Datacenter the expected availability of Infrastructure and Service is of 99.671%, whilst for Tier 4 Datacenter the expected availability of Infrastructure and Service is of 99.995%