Chapter 2 Site Requirements

This chapter describes the site requirements for the Oracle Private Cloud Appliance.

Note

For site checklists, refer to Appendix E, 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)

  • 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:

  • Shipping height: 2159 mm (85 inches)

  • Shipping width: 1118 mm (44 inches)

  • Shipping depth: 1543 mm (60.75 inches)

  • 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.

Table 2.1 Access Route Requirements

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.

Table 2.2 Maintenance Access Requirements

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.

Table 2.3 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:

  • Fluctuations caused by brownouts

  • Wide and rapid variations in input voltage levels or in input power frequency

  • Electrical storms

  • 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.

Table 2.4 PDU Types and Specifications

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.

Note

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.

Table 2.5 Temperature, Humidity, and Altitude Requirements

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.

Note

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 22 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.

Figure 2.1 Typical Data Center Configuration for Perforated Floor Tiles
Figure showing the typical data center configuration for perforated floor tiles.