Atmos Installation

Please can anyone reply ??

Hi,

It depends on how your application will be using the data, the following info from the Atmos Site Planning Guide may help:

Optimal/Balanced: When either option is selected, Atmos writes objects to disks using a weighted

random process so that disks with more free space have a higher chance of being used. For example, if disk 1 has 40% free space and disk 2 has 80% free space, Disk 2 is twice as likely to be used than Disk 1. This ensures that disk

usage is balanced across all disks. Atmos recommends, in most cases, that you pick one placement option for all

segments in your system — it can be either option since they are equivalent. However, if you want to drive certain classes of content to specific Atmos nodes, you can use Optimal and Balanced to differentiate the nodes, and then use the

Optimal and Balanced values when defining policy.

Green: When Green placement is selected, drives are spun up as they are written to so that only one or a few disks are active; the rest are spun down for energy conservation. Atmos writes to the disks in a sequential manner. When the

active disks fill up, the spun-down disks are woken up and used. Drives are spun down after 30 minutes of inactivity.

Green placement has the largest performance cost of the data placement options. It does not utilize the whole storage infrastructure and uses fewer spindles to serve requests. This might result in a bottleneck. If data is on a disk

that is spun down, a request to access it can experience take up to a 2 second delay. For this reason, the Green option is best used for:

• Archives.

• The write once, and read rarely (or never) use case.

• For situations where you can afford the access delay.

Note: Green is not supported for Atmos Virtual Edition installations.