DCD Zettastructure 2017 OCP data center project engineering workshop

Editor's Notes

• #3: Background / Key Objective OCP IT Gear in Open Racks an OCP Data Center project – sub project was formed and tasked to produce a guidelines and quality checklist document that would be used as an aid for the operators of colocation data centers and their tenants to understand the requirements that will be required to enable the smooth and trouble free deployment of Open Racks. The initial project work has been focused on considering the needs of an European colo facility that will need to accommodate an Open Rack V2 weighing 500 kg and with an IT load of 6.6kw this will help us to quickly publish a MVP document & checklist.  
• #4: Open Rack v2.0 600mm typical, but can vary Standard: ~1048mm Shallow: ~ 762mm Height variable usually 42U 500 - 1400kg 21” 48mm OpenU (OU) primarily front only 3 phase AC rack PSU to 12V or 48 VDC busbar distribution optional in-rack Li-ion Typically 3 phase AC 230/ 400 VAC front to back CG-OpenRack-19 600mm 1200mm Height - variable Weight variable 500 - 1500kg 19” Standard EIA-310 44.45mm (1.752”) Standard EIA-310 primarily front only 3 phase AC rack PSU to 12VDC busbar distribution optional in-rack Li-ion 3 phase AC 90 - 264VAC front to back Project Olympus Any Standard EIA-310 rack Any Standard EIA-310 rack Any Standard EIA-310 rack Weight TBD 19” Standard EIA-310 44.45mm (1.752”) Standard EIA-310 primarily front only 3 phase PSU internal to server optional in-server Li-ion 3 phase AC 230/ 400 VAC front to back
• #5: An aide-memoire for those new to Open Compute abbreviation, terms etc
• #6: Clearances Racks having to be unpacked outside of the loading dock because there wasn’t sufficient height to get them into the loading dock. MUST HAVE ACCEPTABLE - Access routes from loading dock to Goods in Area (Storage) delivery pathway 2.7m High x 1.2m -Wide unobstructed access and threshold free OPTIMUM - 2.7m High x 2.4m Wide x 2.4 m Deep - unobstructed access and threshold free CONSIDERATION NICE TO HAVE – PALLET RAMP The rack packaging came without a ramp and the colo operator was unprepared for this so the rack had to be gently titled and slid off the pallet to get it on the slab. NICE TO HAVE - Delivery Tell the story of the recent project where the Open Rack was delivered on a truck without a tail lift without safety rails and the ramp titled over when it was lowered and four people had to steady the rack it as it was lowered to stop it toppling over. Tell the story of the door frame height into white space not being high enough as a ramp finished at the threshold of the door, the engineers then decided to use a crow bar between the top of the rack and the cabinet to raise the height of the door frame.
• #7: Delivery pathway to the white space MUST HAVE ACCEPTABLE- Ramps - Gradient1:12 OPTIMUM - None ACCEPTABLE - Lift / Elevator Weight Loading1500kg OPTIMUM - Lift / Elevator Weight Loading 3000kg Discuss Considerations Loading dock Goods in area Unboxing / Staging area Unacceptable and acceptable ramp construction Door frame heights Floor protection e.g. spreader plates
• #8: White Space MUST HAVE Acceptable - White Space finished floor to ceiling height 3.1m OPTIMUM - White Space finished floor to ceiling height 4.5m Discuss Considerations Door frame heights Slab to slab heights Access floor used for cooling or not Floor loads – rolling loads use of spreader plates Ramp gradients Rails
• #9: Floor Loading MUST HAVE Acceptable White Space access floor uniform load 7.17 kn/m2 732 kg/m2 (150 lb/ft2)(7.17 kn/m2) Acceptable White Space access floor rolling load 5.56 kn/m2 567Kg (1250lb) (5.56kn) OPTIMUM White Space access floor uniform load 111.97 kn/m2 1221 kg/m2 (250 lb/ft2) (11.97 kn/m2) OPTIMUM - White Space access floor rolling load 6.67 kn/m2 680Kg (1500 lb) (6.67kn) Story Tell the story of the floor strengthening works that had to be carried out during my current fit out project. Tell the story re: rolling load specification of the access floo within the corridors outside of the white space were insufficient therefore spreader plates had to be used, this increased the installation time and cost of the project. The access floor load specification was greater than the slab floor load specification and as the white space was on the 2nd floor additional steel supports had to be installed within the access floor void, which delayed the project.
• #10: Cooling Discuss Considerations ACCEPTABLE -HAC/ CAC OPTIMAL - HAC MUST HAVE - Rack airflow direction (front to back) MUST HAVE - Rack inlet temperature temp set point to Ashrae recommended MUST HAVE – Blanking Plates MUST HAVE - Delta T of 12
• #11: Electrical Distribution Discuss Considerations OPTIMAL/ CONSDIERATION - Non Central, upstream UPS to the rack with the supply taken from the input of the UPS distribution board– ACCEPTABLE - Central, upstream UPS to the rack MUST HAVE - Single phase AC voltage nominal range 180V – 264V is the tolerable range CONSIDERATION - Monitoring the health of the power shelf BBU (Li-ion batteries) MUST HAVE - 3 phase 16A CONSIDERATION - 3 phase 32A MUST HAVE - 6.6KW CONSIDERATION - 12.5kW – 32A CONSIDERATION - Genset startup time
• #12: Pathways & Telecommunications Discuss Considerations Pathways Can network connections be routed from overhead pathways to the front of the rack Can network and power connections be routed from the access floor to the top of the rack Can power and network connections be moved from the rear to the front of the rack Leaf-Spine Optimised east-west
• #13: Efficiency - A key OCP tenant is efficient design. power delivery and conversion thermal efficiency, p platform performance (per-W for example) reducing overall infrastructure costs . Scale - OCP contributions must be scale-out ready. The technology is designed with the right supporting features to allow for its maintenance in large scale deployments. Openness- OCP encourages open source contribution comply with a set of already existing open interfaces open source contribution as possible. Providing a solution compatible with already existing OCP contributions Impact - New OCP contributions must create meaningful positive impact within the OCP ecosystem. This can be attained by introducing efficiency gains, introducing new technologies and products that are valuable for scale out computing, creating a multiplier effect by building on top of already existing OCP solutions, and enabling a more robust supply chain by contributing alternative compatible solutions.
• #14: Detailed Quality Checklist with guidance notes Simple Quality Checklist for auditing purposes