FusionServer X6000 V6 Server
Technical White Paper
3 System Architecture
2021-07-16
12
Table 3-1
PSU and power supply redundancy
Number of
PSUs
PSU Rated Power and
Server Rated Power
PSU
Redundancy
Power Supply
Redundancy
2
Server < Single PSU
1+1
1+1
Single PSU ≤ Server
MSPP is used to enable redundancy.
4
Server < 2 PSUs
2+2
1+1
2 PSUs ≤ Server < 3
PSUs
3+1
MSPP is used to enable
redundancy.
3 PSUs ≤ Server
MSPP is used to enable redundancy.
⚫
MSPP is a multi-node power capping function. If the power supply or a PSU fails,
MSPP is triggered (see Table 3-2) to lower the power consumption upper limit of the
server, ensuring that the system's power does not exceed the total rated power of the
remaining normal PSUs. In this case, the upper limit of the system performance is
affected.
⚫
"+N" redundancy of PSUs indicates that the server performance is not affected when
N
PSUs fail.
⚫
"+N" redundancy of power supply indicates that the server performance is not affected
when
N
power supplies fail.
⚫
In typical configuration, the power of an X6000 V6 PSU is 2000 W. The total rated
server power is rarely greater than the total rated power of three PSUs.
Power Capping Mode
The X6000 V6 server supports the following power capping modes:
⚫
MSPP
The system automatically enables or disables MSPP based on the relationship between
the rated power of the server and that of PSUs as described in Table 3-2.
If MSPP is enabled, when a system power supply or PSU fault occurs, MSPP is triggered
(see Table 3-2). After MSPP is triggered, the system sets the power consumption upper
limit for the server node based on the total rated power of the remaining normal PSUs to
ensure that the power of the entire system does not exceed the total rated power. In this
case, the upper limit of the system performance is affected.
⚫
After MSPP is enabled, the server performance will deteriorate. The performance deteriorates more
as the gap between the server rated power and the capped power becomes larger.
⚫
MSPP cannot eliminate server breakdowns in some extreme scenarios:
⚫
Improper maintenance operations, such as removing a PSU without removing the cable first, will
cause system power failure because MSPP cannot be triggered before other PSUs are overloaded. To
prevent this problem, remove the cable before removing a PSU.
⚫
If a PSU short circuit fault occurs, the power supply cannot remain for 10 ms for MSPP to be
triggered and a system breakdown will occur. According to historical statistics, the failure rate of
PSU short circuits is less than 0.0002%.
⚫
User-defined power capping mode
Summary of Contents for X6000
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