Showing posts with label Hyper-V. Show all posts
Showing posts with label Hyper-V. Show all posts

Friday, 27 May 2016

Adopt a Primary

A topic I see occasionally popping up especially for Academies and Secondary Schools.  With costs of IT Support high when you take in to account equipment, software, support and staff it really is a hefty cost.


So a simple - Yes, I would seriously consider adopting either personally or professionally a Primary School.


How would I do it? Professionally (adoption more by the School than my self)


The first task I would perform is evaluate the entire Primary IT:
  • Servers
  • Networking
  • Computers
  • Software
  • Need or Want
Checking all these for age, make, model, reliability and future proofing.  With Primaries now looking at IT similar to what Secondary's were 7 years ago - it's more of a "need" than "want" and must be fit for purpose and work.


The School that NEEDs IT
My advice for the Primary would be to make sure their equipment it self was future proof, spend the money now to ensure reliability.  It's quite simply to create two servers both synchronised with one being housed at the Secondary School and another being at the Primary.  This allows easy maintained, administration and major tasks carried out.  This includes day to day, backups and essential reliability work to be dealt with.  Two servers on site, the secondary server would be primarily software, data storage, imaging and anything else the Primary needed.


Depending on the size of the School it wouldn't need to be two massively expensive servers but the more costs = the more future proofing and availability.


The popular word of course Virtualisation


Infrastructure
It would also be critical to install good quality managed switches, my choice has been HP although they are expensive they seem to last easy 10 years with barely any failures.  Any cabling and trunking to be professionally installed and in any classrooms that could potentially have IT installed.


One day a week - Technician
Currently we can't really spare a man of my team, but given we have cancelled our BYOD Scheme and things are slowly coming to plan - we could soon. 


Work together with Management
This is a crucial part, many times I have seen technicians fall out with Primaries because agreements were more tongue in cheek.  Make it a simple agreement, keep it short and always electronically.  Make sure the Primary is aware of any non day to day jobs are planned well ahead of schedule.  A good example would be installation of new computer areas, if there is no trunking, networking etc then we are talking about a lot of work.


So make it very clear that one day a week jobs need to be alerted (preferably sent by an email), any jobs not done by email can be performed but must be recorded/signed off.  This allows some one in my position to see the kind of day to day jobs.  When I look at our day to day jobs in simple IT areas, we are talking about reimaging a pc, replacing a monitor and installing the occasional update.


Always plan for a contingency budget in the event of a failure, this can also be put towards any IT replacements/improvements before the new financial year.


Why IT in Primaries
The simple fact is, IT is every where and Pupils need to be aware of how the world works.  I've encountered Students where they have had zero clue about IT and are being left behind by those who know what they are doing.  Everyone has a device these days, you still see offices with pcs, the doctors, banks, supermarkets and even garages.


Plan, Plan and Plan some more - Look to 3-5 Years
Although totally unrealistic to plan for 5 years time, it's not unrealistic to consider it.  Keep in mind to keep things working for that long at least.


Don't quite agree? let me know.


Wednesday, 11 May 2016

System from Scratch

An interesting thing I saw the other day - What if I could start a system from scratch.  I will do this post over time - making updates as I go.




I've already covered Cloud so for the moment I will leave that out (minus the Office 365 for the software to all users).


We have a dozen or so servers, ranging from Finance, software, SIMs.net and the DNS/DHCP and DCs.


So server spec - I wouldn't hold back.


DELL - only my preference, I know them, they work, easy to customise and I've had no issues.
www.dell.co.uk


What do I need? Dell Rack Mount PowerEdge -Premiums (personally I would dream of blade)
  • Virtualisation - Hyper-V
  • Memory
  • More than one Processor
  • Space, Space and more Space
  • Room to add more
  • Separate main DC (used to be called Primary Controller)
  • Rack Mounts
So a simple DC server, with a bit of redundancy so any failures the server would continue to run.  This could be setup with a simple RAID to mirror two drives, more than one PSU, spare RAM and perhaps even two processors.  No matter what this little one wouldn't cost too much and would effectively be online doing a simple task 24/7.


Virtual Servers, Going for three of these to improve flexibility, redundancy and reliability.  Ever heard the term for all your eggs in a basket?  The dream would be 5 or even 6 physical boxes with DFS replication between the servers including exchange.  Even in Education, the reliance on IT is very heavy and although failures don't cost millions it instead impacts on Education.  We all see the fines given to Parents who take their kids for one day holidays, the detentions given for lateness or 5 minute lesson wastage - IT is no different.


So in this scenario I will look at three physical boxes.  The primary role on one server will be exchange, the second will be DATA and the third will be SIMs/Finance and any SQLs/Imaging.


This gives an off balance for any data transfers and also allows each physical box to have extra virtual servers based on the performance of each one.


So let's look at the Spec:
  • PowerEdge R730, TPM.
  • Up to 16 2.5" Hard Drives.
  • Xeon E5-2643 v3.3.
  • Upgraded to two processors.
  • 2 CPU with GPU.
  • 8x8 GB RDIMM.
  • No OS (we always install ours and purchase our own licenses).
  • RAID 5 (usually my preference).
  • RAID controller 2GB NV cache.
  • 16x 400GB Solid State (I would normally go for 15K RPM 600GB) - but same price !.
  • iDRAC Enterprise.
  • QLogic 57800 2x10GB.
  • Additional Network Card (QLOGIC).
Don't forget a good UPS for your server solutions. 


Estimated cost for the above is around £20,000 which is about right for a really good server, three of those totally around £60,000.  Considering how much Schools spend on servers over 10-15 Years this is a really good path.
If money wasn't an option, I would consider a high processor choice, likewise for the Solid State to high GB or even TB and more RAM.


How would I setup these Servers?


Small Server:
  • Primary DC
  • Primary DNS
  • Primary DHCP
Virtual Server number 1:
  • Secondary DC
  • Secondary DNS
  • Secondary DHCP
  • Primary Data Storage
  • Extra Server
  • Extra Server
Virtual Server number 2:
  • Exchange
  • DNS
  • DHCP
  • Software
  • Extra Server
  • Extra Server
Virtual server number 3:
  • SIMs Server
  • Finance
  • Imaging
  • Secondary Data Storage
  • CCTV Server
  • Extra Server
  • Extra Server
  • Extra Server
Although this is all based on performance levels, Exchange has a habit of being a memory hungry system.  Our primary data storage has a habit of being very space hungry.


I would even be able to increase each Virtual Server to have more VMs, I'd also like to develop a system to allow Labs for Students studying ICT.


DFS Replication, all based on performance and space requirements but I would consider this in the above 3 Servers.  Although I will admit this is a little overkill but remember I base this on IT reliance of my current job and experience.  I have never worked at a place that didn't rely on IT, it had to work and couldn't be down for a few minutes.  Students work is 75% electronically stored, 98% of Staff work is also stored on the system.  Everyone uses email and records mail dating back 10 Years.  One member of Staff has a mailbox of 25GB. 


Do not underestimate servers, reliance on IT or the future.  It's better to go overkill than finding out in 2 years time you don't have enough.  This server setup should be enough to last you 10 Years with minimal replacements starting 5-7 Years.  Fingers crossed you wouldn't need any heavy expenditure over that 10 Year period.  Technically, depending on IT developments it could even last more - or by that time Cloud would have improved enough to seriously consider.


You may not agree, but by all means let me know what you think.