Chapter 2 Site Requirements
This chapter describes the site requirements for the Oracle Private Cloud Appliance.
For site checklists, refer to Appendix D, Site Checklists.
2.1 Space Requirements
Oracle Private Cloud Appliance racks have the following space requirements:
-
Height: 42U - 2000 mm (78.74 inches)
-
Width: 600 mm with side panels (23.62 inches)
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Depth (front door handle to rear door handle): 1197 mm (47.12 inches)
-
Depth (doors removed): 1112 mm (43.78 inches)
-
Weight (base rack, fully populated): 1000 kg (2204 lbs)
The minimum ceiling height for the cabinet is 2914 mm (114.72 inches), measured from the true floor or raised floor, whichever is higher. This includes an additional 914 mm (36 inches) of space required above the rack height for maintenance access. The space surrounding the cabinet must not restrict the movement of cool air between the air conditioner and the front of the systems within the cabinet, or the movement of hot air coming out of the rear of the cabinet.
2.1.1 Receiving and Unpacking Requirements
Before your Oracle Private Cloud Appliance arrives, ensure that the receiving area is large enough for the package. The following are the package dimensions and weights for an Oracle Private Cloud Appliance system:
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Shipping height: 2159 mm (85 inches)
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Shipping width: 1118 mm (44 inches)
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Shipping depth: 1543 mm (60.75 inches)
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Shipping weight (base rack, fully populated): 1118 kg (2465 lbs)
If your loading dock meets the height and ramp requirements for a standard freight carrier truck, then you can use a pallet jack to unload the rack. If the loading dock does not meet the requirements, then you must provide a standard forklift or other means to unload the rack. You can also request that the rack be shipped in a truck with a lift gate.
When your Oracle Private Cloud Appliance arrives, leave the rack in its shipping packaging until it arrives at its installation site. Use a conditioned space to remove the packaging material to reduce particles before entering the data center. The entire access route to the installation site should be free of raised-pattern flooring that can cause vibration.
Allow enough space for unpacking the system from its shipping cartons. Ensure that there is enough clearance and clear pathways for moving the Oracle Private Cloud Appliance from the unpacking location to the installation location. Table 2.1 lists the access route requirements for the Oracle Private Cloud Appliance.
|
Access Route Item |
With Shipping Pallet |
Without Shipping Pallet |
|---|---|---|
|
Minimum door height |
2159 mm (85 inches) |
2000 mm (78.74 inches) |
|
Minimum door width |
1118 mm (44 inches) |
600 mm (23.62 inches) |
|
Minimum elevator depth |
1543 mm (60.75 inches) |
1058.2 mm (41.66 inches) |
|
Maximum incline |
6 degrees |
6 degrees |
|
Maximum elevator, pallet jack, and floor loading capacity |
1145 kg (2520 lbs) |
1145 kg (2520 lbs) |
2.1.2 Maintenance Access Requirements
The maintenance area must be large enough for Oracle Private Cloud Appliance, and have the required access space. For example, the required space to remove the side panels is 675.64 mm (26.6 inches). Table 2.2 lists the maintenance access requirements for the Oracle Private Cloud Appliance.
|
Location |
Maintenance Access Requirement |
|---|---|
|
Rear maintenance |
914 mm (36 inches) |
|
Front maintenance |
1232 mm (48.5 inches) |
|
Top maintenance |
914 mm (36 inches) |
2.2 Flooring Requirements
Oracle recommends that the Oracle Private Cloud Appliance be installed on raised flooring. The site floor and the raised flooring must be able to support the total weight of the system as specified in Section 2.1, “Space Requirements”.
Table 2.3 lists the floor load requirements.
|
Description |
Requirement |
|---|---|
|
Maximum allowable weight of installed rack equipment |
952.54 kg (2100 lbs) |
|
Maximum allowable weight of installed power distribution units |
52.16 kg (115 lbs) |
|
Maximum dynamic load (maximum allowable weight of installed equipment including power distribution units) |
1004.71 kg (2215 lbs) |
2.3 Electrical Power Requirements
The Oracle Private Cloud Appliance can operate effectively over a wide range of voltages and frequencies. However, it must have a reliable power source. Damage might occur if the ranges are exceeded. Electrical disturbances such as the following might damage the system:
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Fluctuations caused by brownouts
-
Wide and rapid variations in input voltage levels or in input power frequency
-
Electrical storms
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Faults in the distribution system, such as defective wiring
To protect your system from such disturbances, you should have a dedicated power distribution system, power-conditioning equipment, as well as lightning arresters or power cables to protect from electrical storms.
Each rack has two pre-installed power distribution units (PDUs). The PDUs accept different power sources. You must specify the type of PDU that is correct for your data center.
Table 2.4 lists the PDU low-voltage requirements.
|
Item |
15kVA - type 6440A |
15kVA - type 6441A |
15kVA - type 6442A |
22kVA - type 7100873 |
22kVA - type 7100874 |
24kVA - type 6444A |
24kVA - type 6445A |
|---|---|---|---|---|---|---|---|
|
Region |
North and South America, Japan and Taiwan |
EMEA and APAC (except Japan and Taiwan) |
North and South America, Japan and Taiwan |
North and South America, Japan and Taiwan |
EMEA and APAC (except Japan and Taiwan) |
North and South America, Japan and Taiwan |
EMEA and APAC (except Japan and Taiwan) |
|
Number of inputs |
1 |
1 |
3 |
3 |
3 |
2 |
2 |
|
Source voltage |
200-220V |
220/380 - 240/415VAC |
200-240V |
200-240V |
200-240V |
200-220V |
220/380 - 240/415VAC |
|
Frequency |
50/60 Hz |
50/60 Hz |
50/60 Hz |
50/60 Hz |
50/60 Hz |
50/60 Hz |
50/60 Hz |
|
Max. line current |
40A |
21A |
24A |
36.8A |
32A |
34.6A |
16A |
|
Phase current |
23A |
21A |
N/A |
N/A |
32A |
20A |
16A |
|
Recommended circuit breaker |
50A |
25A |
30A |
50A |
30A |
50A |
25A |
|
Outlets |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
42 x C13 6 x C19 |
|
Outlet groups |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
|
Max. group current |
20A |
20A |
20A |
20A |
20A |
20A |
18A |
|
Output voltage |
200-240V |
220-240V |
200-240V |
200-240V |
200-240V |
220-240V |
200-240V |
|
Data center receptacle |
3ph 3W + ground 60A IEC60309 |
3ph 4W + ground 32A IEC60309 5P 6h 400V |
1ph 2W + ground 30A NEMA L6-30 |
1ph 2W + ground 50A Hubbell CS8265C |
1ph 2W + ground 32A IEC60309 3P 6H 230V |
3ph 3W + ground 60A IEC60309 |
3ph 4W + ground 32A IEC60309 5P 6h 400V |
2.3.1 Facility Power Requirements
Electrical work and installations must comply with applicable local, state, or national electrical codes. Contact your facilities manager or qualified electrician to determine what type of power is supplied to the building.
To prevent catastrophic failures, design the input power sources to ensure adequate power is provided to the power distribution units (PDUs). Use dedicated AC breaker panels for all power circuits that supply power to the PDU. When planning for power distribution requirements, balance the power load between available AC supply branch circuits. In the United States and Canada, ensure that the overall system AC input current load does not exceed 80 percent of the branch circuit AC current rating.
PDU power cords are 4 meters (13.12 feet) long, and 1 to 1.5 meters (3.3 to 4.9 feet) of the cord will be routed within the rack cabinet. The installation site AC power receptacle must be within 2 meters (6.6 feet) of the rack.
2.3.2 Circuit Breaker Requirements
To prevent catastrophic failures, the design of your power system must ensure that adequate power is provided to all of the compute nodes. Use dedicated AC breaker panels for all power circuits that supply power to the compute nodes. Electrical work and installations must comply with applicable local, state, or national electrical codes. Compute nodes require electrical circuits to be grounded to the Earth.
In addition to circuit breakers, provide a stable power source, such as an uninterruptable power supply (UPS) to reduce the possibility of component failures. If computer equipment is subjected to repeated power interruptions and fluctuations, then it is susceptible to a higher rate of component failure.
Circuit breakers are supplied by the customer. One circuit breaker is required for each power cord.
2.3.3 Grounding Guidelines
The cabinets for the Oracle Private Cloud Appliance are shipped with grounding-type power cords (three-wire). Always connect the cords to grounded power outlets. Because different grounding methods are used, depending on location, check the grounding type, and refer to documentation, such as IEC documents, for the correct grounding method. Ensure that the facility administrator or qualified electrical engineer verifies the grounding method for the building, and performs the grounding work.
2.4 Temperature and Humidity Requirements
Airflow through the Oracle Private Cloud Appliance is from front to back. For information, see Section 2.5, “Ventilation and Cooling Requirements”.
Studies have shown that temperature increases of 10 degrees Celsius (18 degrees Fahrenheit) above 20 degrees Celsius (68 degrees Fahrenheit) reduce long-term electronics reliability by 50 percent. Excessive internal temperatures might result in full or partial shutdown of the Oracle Private Cloud Appliance.
Table 2.5 lists the temperature, humidity and altitude requirements for operating and non-operating systems.
|
Condition |
Operating Requirement |
Non-operating Requirement |
Optimum |
|---|---|---|---|
|
Temperature |
5 ° to 32 ° Celsius (41 ° to 89.6 ° Fahrenheit) |
-40 ° to 68 ° Celsius (-40 ° to 154 ° Fahrenheit) |
For optimal rack cooling, data center temperatures from 21 ° to 23 ° Celsius (69.8 ° to 73.4 ° Fahrenheit) |
|
Relative humidity |
10 to 90 percent relative humidity, non-condensing |
Up to 93 percent relative humidity |
For optimal data center rack cooling, 45 to 50 percent non-condensing |
|
Altitude |
3,000 meters (9,840 feet) maximum |
12,000 meters (39,370 feet) |
Ambient temperature is reduced by 1 ° Celsius per 300 meters above 900 meters altitude above sea level |
Set conditions to the optimal temperature and humidity ranges to minimize the chance of downtime due to component failure. Operating an Oracle Private Cloud Appliance for extended periods at or near the operating range limits, or installing it in an environment when it remains at or near non-operating range limits could significantly increase hardware component failure.
The ambient temperature range of 21 ° to 23 ° Celsius (69.8 ° to 73.4 ° Fahrenheit) is optimal for server reliability and operator comfort. Most computer equipment can operate in a wide temperature range, but near 22 ° Celsius (71.6 ° Fahrenheit) is desirable because it is easier to maintain safe humidity levels. Operating in this temperature range provides a safety buffer in the event that the air conditioning system goes down for a period of time.
The ambient relative humidity range of 45 to 50 percent is suitable for safe data processing operations. Most computer equipment can operate in a wide range (20 to 80 percent), but the range of 45 to 50 percent is recommended for the following reasons:
-
Optimal range helps protect computer systems from corrosion problems associated with high humidity levels.
-
Optimal range provides the greatest operating time buffer in the event of air conditioner control failure.
-
This range helps to avoid failures or temporary malfunctions caused by intermittent interference from static discharges that may occur when relative humidity is too low.
Electrostatic discharge (ESD) is easily generated, and hard to dissipate in areas of low relative humidity, such as below 35 percent. ESD becomes critical when humidity drops below 30 percent. It is not difficult to maintain humidity in a data center because of the high-efficiency vapor barrier and low rate of air changes normally present.
2.5 Ventilation and Cooling Requirements
Always provide adequate space in front of and behind the rack to allow for proper ventilation. Do not obstruct the front or rear of the rack with equipment or objects that might prevent air from flowing through the rack. Rack-mountable servers and equipment typically draw cool air in through the front of the rack and let warm air out the rear of the rack. There is no airflow requirement for the left and right sides due to front-to-back cooling.
If the rack is not completely filled with components, then cover the empty sections will filler panels. Gaps between components can adversely affect airflow and cooling within the rack.
Relative humidity is the percentage of the total water vapor that can exist in the air without condensing, and is inversely proportional to air temperature. Humidity goes down when the temperature rises, and goes up when the temperature drops. For example, air with a relative humidity of 45 percent at a temperature of 24 ° Celsius (75.2 ° Fahrenheit) has a relative humidity of 65 percent at a temperature of 18 ° Celsius (64.4 ° Fahrenheit). As the temperature drops, the relative humidity rises to more than 65 percent, and water droplets are formed.
Air conditioning facilities usually do not precisely monitor or control temperature and humidity throughout an entire computer room. Generally, monitoring is done at individual points corresponding to multiple exhaust vents in the main unit, and other units in the room. Special consideration should be paid to humidity when using underfloor ventilation. When underfloor ventilation is used, monitoring is done at each point close to an exhaust vent. Distribution of the temperature and humidity across the entire room is uneven.
The Oracle Private Cloud Appliance has been designed to function while installed in a natural convection air flow. The following requirements must be followed to meet the environmental specification:
-
Ensure that there is adequate airflow through the system.
-
Ensure that the system has front-to-back cooling. The air intake is at the front of the system, and the air outlet is at the rear of the system.
-
Allow a minimum clearance of 1219.2 mm (48 inches) at the front of the system, and 914 mm (36 inches) at the rear of the system for ventilation.
Use perforated tiles, approximately 400 CFM/tile, in front of the rack for cold air intake. The tiles can be arranged in any order in front of the rack, as long as cold air from the tiles can flow into the rack. Inadequate cold airflow could result in a higher intake temperature in the system due to exhaust air recirculation. The following is the recommended number of floor tiles:
-
Four floor tiles for an Oracle Private Cloud Appliance with up to 25 compute nodes (fully loaded)
-
Three floor tiles for an Oracle Private Cloud Appliance with up to 16 compute nodes (half loaded)
-
One floor tile for an Oracle Private Cloud Appliance with 8 compute nodes (quarter loaded)
Figure 2.1 shows a typical installation of the floor tiles in a data center for Oracle Private Cloud Appliance with more than 16 compute nodes.
