Before Choosing a Colocation Facility
- December 23, 2009
In the jet age communication and data access are two most important factors for business operations. Email, messaging websites and servers have to be up 24×7 and they should be protected for business communication to function. Specially Data Centers which have servers with mission critical information. Most important are company databases and servers, which should be kept up at any cost. Important factors in a colocation facility are:
Systems used in colocation servers should be redundant and at every point of working they should have proper capacity. Many people get confused with multiple units considering them as redundancy. Ideal configuration for systems used in colocation facilities should be n+1, which means that if there are two units they should run at 50% capacity, and in any case if one fails other will handle the load. Same if there are three units working capacity should be 66%.
Major points which decides the Internet Connectivity of a colocation services are as follows:
- Total Bandwidth available for usage
- Accessible Internet backbones
- Uptime guarantee
- Packet loss, jitter and Latency
Carrier-neutral access and Tier -1 carriers, tier-2 carriers all get access to internet using Colocation data centers. Carrier-neutral can be used by any service from any carrier but customers are requested to configure their own routing. Also customers are should maintain their own connections to Internet backbones. Tier-1 is used by Internet giants like AT&T for direct access. Tier-2 is used for routing traffic amongst the multiple Tier-1 providers. In these kind of tiers speed and reliability depends on how effectively traffic is routed. Tier-2 is preferred by most of the clients since routing is configured by the Colocation facility. Also it is more reliable because of the presence of backbones, these backbones network performance and uptime.
Control on Climate
Design of the Colocation Services itself affects the performance of the systems used in the colocation facility. Air flow between rack rows should be controlled by the server rooms. Hot air generated due to the heat produced by the servers should be blown in one direction and cool air to keep the servers cool should exit from another direction. Only dedicated hot and cols air flow can save the servers from overheating and finally burning down. Cold sir and humidity is controlled by correctly sized and redundant climate control units. As we all know climate requirements for the server are strict and they only work properly when they are installed under suitable working environment. Servers need 50% humidity and 70 degrees of temperature. Both CRAC units and chillers for the server rooms should be included in a Colocation facility. Cooling capacity is calculated by total tonnage by the square footage.
Power to the colocation is like oxygen to the humans, if it fails to perform then you are in deep trouble. UPS and generators should be used for backup and they are necessary to keep the network online. UPS are used when power is shifted from regular to the generators. Generators should be there 24X7 for immediate backup power. Power system of a colocation facility should be properly working and should have following features for perfection:
- Redundant and multiple UPS because of the reason UPS fails very oftenly.
- Generator which can handle at least 1.5 time the total building load
Equal Distribution of Traffic
Both hardware and logic of distribution has an important effect on connectivity. The way traffic is divided plays an important role in the performance of routing. If your distribution covers three below given points than it is perfect:
- In order to continually adjusting routes to find the most effective one Performance based distribution is should be used. Performance based concentrates on performance rather then price.
- Switches and routers should be redundant and be working on full working for the customers.
- Distributions should be done between more than 4-5 clients.