Benefits of moving from physical servers to cloud computing services
The cloud describes systems or services that are hosted and managed online, rather than locally in the school building.
Benefits for schools
Economy - saving money
Moving to cloud-based services can reduce costs by:
saving money on the energy required to run and cool on-site servers. A server consuming 500W consumes about £600 of electricity each year.
reducing licence costs – leading technology providers offer free-to-use cloud services, including communication tools and core office applications
using cloud only user devices – cost effective and reliable devices, designed to link directly to cloud applications, are widely available and usually cheaper than the systems they replace
using pay as you go services – some cloud-based services are charged on a pay as you go basis
Efficiency – saving teachers’ time
Moving to cloud-based services can:
give staff the flexibility to access services from wherever they are, using the devices that are most convenient for them
support collaboration by helping staff to easily share and co-author documents, files, lesson content and plans – reducing duplication of effort
make it easier for teachers and pupils to research, analyse and use new curriculum resources
reduce the time it takes to access data and applications anywhere, due to faster log in times
Effectiveness – what you can do
Moving to cloud-based services can make it easier to access applications and content, wherever there is an internet connection:
reducing the workload of local technical support teams, as applications can be automatically updated and managed
mitigating the risk of files and data being lost
It could also support flexible working as you can access data remotely at any time.
Recommendations for reducing energy use by physical servers if these are still in use at your school
Replacing the servers with more modern more efficient versions: A server consuming 500W consumes about £600 of electricity each year. Replacing it with a new more modern energy efficient server consuming 250W would save £300 per year, and considering a new server is likely to cost £500 to £700 per year, then it is possible to get a return on your investment within 2 to 3 years.
Server consolidation: some schools have multiple servers which independently service authentication, file systems, printers and remote hosting; it is possible with the power of today’s computers that all these functions could be consolidated onto one server.
Putting servers into standby out of school hours: it is possible in most circumstances to configure servers to go into standby mode when not in use particularly out of school hours e.g. outside 06:00 to 22:00 on school days, the servers could then be configured to automatically wake up at set times or to wake up when clients log in (WOL – Wakeup On LAN). To accommodate this change, backup schedules could be switched to faster incremental backups and organised to run round outside periods
Admin servers: some primary schools have an admin server which supports admin staff and can provide Local Authority and regulatory services. If such a server is still used in your school, you could approach your local authority about making use of cloud technology.
Network consolidation; Many schools are in the process of switching from desktops with direct Ethernet connections to the school’s network to laptops and wireless connections, reducing the need for network switches. Make sure associated network switches have been retired or consolidated.
Reducing energy use associated with cooling server rooms
Make sure the server room is not too cool: to save energy you want to minimise the cooling in the server room. Unfortunately if the servers get too hot their reliability reduces, but you can over-cool servers – hard disk drives for example become less reliable the cooler they are. The optimum inlet temperature for servers is 24C to 27C , so you could run the server room as high as 27C without significantly impacting the servers reliability.
Optimising cooling airflow: Ideally you want the cold air from the air conditioner dropping down into the intake of the server and the warm air from the outtake rising back to the extract of the air conditioner to avoid mixing with the cold air. This may require the server cabinet to be turned through 180 degrees. If it is orientated the wrong way then you are mixing warm air with cool air before feeding it into the servers which is not very efficient. Ensuring the cabinet containing the servers is fully enclosed by panels may also improve the air flow.