2 Site Requirements for Exalogic Machine

This chapter describes the site requirements for the Exalogic machine.

This chapter contains the following topics:

2.1 Environmental Requirements

The environmental requirements for an Exalogic machine depend on the purchased hardware configuration. The environmental requirements for an Exalogic rack can be found in the data sheets at the following location:

http://www.oracle.com/technetwork/server-storage/engineered-systems/exalogic/index.html

2.2 Space Requirements

All Exalogic machines use the same rack, and have the same space requirements. The space requirements are as follows:

  • Height: 1998 mm (78.66 inches)

  • Width: 600 mm with side panels (23.62 inches)

  • Depth (front door handle to rear door handle): 1200 mm (47.24 inches)

  • Depth (doors removed): 1112 mm (43.78 inches)

The minimum ceiling height for the cabinet is 2300 mm (90 inches), measured from the true floor or raised floor, whichever is higher. An additional 914 mm (36 inches) is for top clearance. The space above the cabinet and its surroundings must not restrict the movement of cool air between the air conditioner and the cabinet, or the movement of hot air coming out of the top of the cabinet.

2.2.1 Receiving and Unpacking Requirements

Before your Exalogic machine arrives, ensure that the receiving area is large enough for the package. The following are the package dimensions for the Exalogic machine:

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 the Exalogic machine arrives, leave the rack in its shipping packaging until it arrives in 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 it from its shipping cartons. Ensure that there is enough clearance and clear pathways for moving the Exalogic machine from the unpacking location to the installation location. Table 2-1 lists the access route requirements for the Exalogic machine.

Table 2-1 Access Route Requirements

Access Route Item With Shipping Pallet Without Shipping Pallet

Minimum door height

2184 mm (86 inches)

2040 mm (80.32 inches)

Minimum door width

1220 (48 inches)

600 mm (23.62 inches)

Minimum elevator depth

1575 mm (62 inches)

1200 mm (47.24 inches)

Maximum incline

6 degrees

6 degrees

Minimum elevator, pallet jack, and floor loading capacity

1134 kg (2500 lbs)

1134 kg (2500 lbs)


2.2.2 Maintenance Access Requirements

The maintenance area must be large enough for the Exalogic machine, 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 Exalogic machine.

Table 2-2 Maintenance Access Requirements for Exalogic Machine

Location Maintenance Access Requirement

Rear maintenance

914 mm (36 inches)

Front maintenance

914 mm (36 inches)

Top maintenance

914 mm (36 inches)


2.3 Flooring Requirements

Oracle recommends that the Exalogic machine be installed on raised flooring. The site floor and the raised flooring must be able to support the total weight of the Exalogic machine as specified in Section 2.1.

Table 2-3 lists the floor load requirements.

Table 2-3 Floor Load Requirements for Exalogic Machine

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 PDUs)

1004.71 kg (2215 lbs)


Note:

Open tiles are required for electrical access.

2.4 Electrical Power Requirements

Exalogic Machine can operate effectively over a wide range of voltages and frequencies. However, it must have a reliable power source. Damage may occur if the ranges are exceeded. Electrical disturbances such as the following may damage Exalogic Machine:

  • 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 Exalogic machine 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 Requirements for Low Voltage

Specification 15 kVA, 1 ph 15 kVA, 3 ph 22 kVA, 1 ph 24 kVA, 3 ph

Phase

1 ph

3 ph

1 ph

3 ph

Market Part Number

6442A

6440A

7100873

XSR-24K-IEC309-4P

Manufacturing Part Number

597-0566-01

597-0564-01

7018123

594-5596-01

Voltage

200-240 VAC 1ph

200-240 VAC 3ph

200-240 VAC 1ph

200-240 VAC 3ph

Amps Per PDU

72A (3 × 24A)

69A (3 × 23A)

110.4 (3x36.8A)

120A (6 × 20A)

Outlets

42 C13, 6 C19

42 C13, 6 C19

42 C13, 6 C19

42 C13, 6 C19

Number of Inputs

3x30A, 1 ph

1x60A, 3 ph

3 x50A 1 ph

2x60A, 3 ph

Current

24A max. per input

40A max. per phase

36.8A per input

34.6A max. per phase

Data Center Receptacle

NEMA L6-30R

IEC309-3P4W-IP67

(60A, 250V, AC, 3 ph)

IEC309 60A 3ph 4 Wire

Hubbell HBL460R/C9W or equivalent.

Hubbell CS8265C

IEC309-3P4W-IP67

(60A, 250V, AC, 3 ph)

IEC309 60A 3ph 4 Wire

Hubbell HBL460R/C9W or equivalent.

Number of Outlets Per Rack

6

2

6

4


Table 2-5 lists the PDU high voltage requirements.

Table 2-5 PDU Requirements for High Voltage

Specification 15 kVA, 1 ph 15 kVA, 3 ph 22 kVA, 1 ph 24 kVA, 3 ph

Phase

1 ph

3 ph

1 ph

3 ph

Market Part Number

6443A

6441A

7100874

XSR-24K-IEC309-5P

Manufacturing Part Number

597-0567-01

597-0565-01

7018124

594-5600-01

Voltage

200-240 VAC 1ph

220/380-240/415 VAC 3ph

200-240 VAC 1ph

220/380-240/415 VAC 3ph

Amps Per PDU

72A (3 × 24A)

62.7 A (3 × 20.9A)

96A (3x32A)

109A (6 × 18.1A)

Outlets

42 C13, 6 C19

42 C13, 6 C19

42 C13, 6 C19

42 C13, 6 C19

Number of Inputs

3x25A, 1 ph

1x25A, 3 ph

3 x 32A 1 ph

2x25A, 3 ph

Current

24A max. per input

24A max. per input

32 A per input

18 A max. per input

Data Center Receptacle

IEC 309-2P3W-IP44

(32A, 250V, AC, 3ph)

IEC309 32A 1ph 3 Wire Hubbell HBL332R/C9W or equivalent

IEC 309-4P5W-IP44

(32A, 400V, AC, 3ph)

IEC309 32A 3ph 5 Wire Hubbell HBL532R/C9W or equivalent.

Hubbell CS8265C

IEC 309-4P5W-IP44(32A, 400V, AC, 3ph)

IEC309 32A 3ph 5 Wire Hubbell HBL532R/C9W or equivalent.

Number of Outlets Per Rack

6

2

6

4


2.4.1 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 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 m (13.12 feet) long, and 1 to 1.5 m (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 m (6.6 feet) of the rack.

2.4.2 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 uninterruptible 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.

2.4.3 Grounding Guidelines

The cabinets for the Exalogic machine 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.

2.5 Temperature and Humidity Requirements

Airflow through Exalogic machines is from front to back. For cooling and airflow requirements, see Section 2.1, "Environmental Requirements".

Note:

Studies have shown that temperature increases of 10 degrees Celsius (15 degrees Fahrenheit) above 20 degrees Celsius (70 degrees Fahrenheit) reduce long-term electronics reliability by 50 percent.

Excessive internal temperatures may result in full or partial shutdown of Exalogic machines.

Table 2-6 lists the temperature, humidity and altitude requirements for operating and nonoperating machines.

Table 2-6 Temperature, Humidity, and Altitude Requirements

Condition Operating Requirement Nonoperating Requirement Optimum

Temperature

5 to 32 degrees Celsius (59 to 89.6 degrees Fahrenheit)

-40 to 70 degrees Celsius (-40 to 158 degrees Fahrenheit).

For optimal rack cooling, data center temperatures from 21 to 23 degrees Celsius (70 to 47 degrees 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

3048 meters (10000 feet) maximum

12000 meters (40000 feet).

Ambient temperature is reduced by 1 degree Celsius per 300 m above 900 m 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 Exalogic machine for extended periods at or near the operating range limits, or installing it in an environment where it remains at or near non-operating range limits could significantly increase hardware component failure.

The ambient temperature range of 21 to 23 degrees Celsius (70 to 74 degrees Fahrenheit) is optimal for server reliability and operator comfort. Most computer equipment can operate in a wide temperature range, but near 22 degrees Celsius (72 degrees 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 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.

2.6 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 air flow 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 with filler panels. Gaps between components can adversely affect air flow 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 degrees Celsius (75 degrees Fahrenheit) has a relative humidity of 65 percent at a temperature of 18 degrees Celsius (64 degrees 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.

Exalogic machines have been designed to function while mounted in a natural convection air flow. The following requirements must be followed to meet the environmental specification:

  • Ensure there is adequate air flow through the server.

  • Ensure the server has front-to-back cooling. The air inlet is at the front of the server, and the air is let out the rear.

  • Allow a minimum clearance of 914 mm (36 inches) at the front of the server, and 914 mm (36 inches) at the rear of the server 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 air flow could result in a higher inlet temperature in the servers due to exhaust air recirculation. The following is the recommended number of floor tiles:

  • Four floor tiles for Exalogic machine full rack.

  • Three floor tiles for Exalogic machine half rack.

  • One floor tile for Exalogic machine quarter rack and for Exalogic machine eighth rack.

Figure 2-1 shows a typical installation of the floor tiles for an Exalogic machine full rack in a typical data center.

Figure 2-1 Typical Data Center Configuration for Perforated Floor Tiles

Description of Figure 2-1 follows
Description of "Figure 2-1 Typical Data Center Configuration for Perforated Floor Tiles"