CN115833354A - Storage server power-down protection device and method - Google Patents

Abstract

This application discloses a power-down protection device and method for a storage server. If it is detected that the power supply module is powered off, a signal is sent to the server controller module for data storage, and at the same time, the battery module automatically starts to supply power. The server controller module relies on the battery module to provide The power supply continues to run, stops the data receiving service, and stores the data in the cache in the non-volatile storage module; if it detects that the voltage of the battery module is too low, disconnect the circuit of the battery module to avoid damage to the power module due to the low voltage ; If it is detected that the power supply module resumes the power supply, the power module connects the battery module to charge the battery module. The application circuit is simple and reliable; the capacity of the battery module is large, and the data can be directly stored in the non-volatile storage module without data recovery, and has good versatility, and does not require a DCDC power conversion circuit, and can be adapted to a general storage server.

Description

A storage server power failure protection device and method

technical field

The invention belongs to the technical field of computers, and in particular relates to a storage server power-down protection device and method.

Background technique

In modern computer architecture, volatile memory is generally used as data cache acceleration, and in the case of abnormal power failure of cache technology, the data in the cache is too late to be stored in non-volatile memory, which can easily cause data loss and cannot Ensure data security and consistency. At present, there are three mainstream power-failure protection methods: one is UPS (uninterrupted power supply) uninterruptible power supply, which is mainly used in storage centers. Charge. When the external power supply fails abnormally, the UPS converts the electric energy in the battery into alternating current through inverter to maintain the continuous operation of the electrical equipment, and the storage server saves the cached data to the hard disk and shuts down the service to ensure data security. The other is the BBU (Battery Backup Unit), which is used internally by a single machine to provide power for the system to save cached data, or to ensure that some circuits of the server continue to run for a period of time. The time is generally short, usually no more than tens of seconds. The system saves the data during this time until the external power supply is restored. There is also a non-volatile memory NVDIMM. The non-volatile memory has the characteristic that the data will not be lost when the power is turned off. When the system is powered on again, the controller will restore the data to ensure that the cached data will not be lost. In the above three methods, since UPS includes inverter and rectifier circuits, etc., it takes up a lot of space and costs a lot. The BBU only supplies power to some circuits, and is relatively small in size. The protection time is generally short, and the power control circuit is also complicated, making it difficult to realize the technology. NVDIMM is a new type of storage device. To give full play to its role, it is necessary to change the memory circuit design of the original storage server, and the software must be adapted to a certain extent, which is difficult and costly to implement.

CN102929805A discloses a storage system cache power-down protection method. The invention uses a power module similar to a BBU form, which only supplies power to components such as memory and flash cards, but data recovery is required after power-on, and software and hardware require certain Adaptation, and need to use DCDC circuit to convert the power supply, the circuit is relatively complex. CN104021093A discloses a power-down protection method for NVDIMM-based storage devices. The invention uses NVDIMM storage devices to protect cached data. When power-off occurs, NVDIMM completes data storage and restores data when power is restored. The advantage is that it does not require Battery-powered, but the design of the memory circuit of the original storage server needs to be changed, and the software needs to be adapted to a certain extent, which is difficult and expensive to implement.

Contents of the invention

The purpose of the invention is to solve the problems in the prior art that the circuit is relatively complex, the volume is large, the reliability is low, and the cost is also high.

In order to achieve the purpose of the present invention, the present invention discloses a storage server power-down protection device, including a power module, a power detection module, a battery module, a server controller module, and a non-volatile storage module; The volatile memory module and the server controller module are connected in parallel; the battery module is directly connected in parallel with the power module after passing through the electronic switch; the server controller module and the non-volatile memory module transmit and store data through the signal line, and the power detection module obtains the data through the signal line In the working state of the power module and battery module, the power detection module sends a disk drop command to the server controller module through the signal line;

The power module is used to supply power to the server controller module and non-volatile storage module; the power detection module is responsible for detecting the state of the battery module; if it detects that the power module is powered off, it sends a signal to the server controller module for data storage At the same time, the battery module automatically starts to supply power, the server controller module continues to operate relying on the power provided by the battery module, stops the data receiving service, and stores the data in the cache in the non-volatile storage module; if it detects that the voltage of the battery module is too low, Then disconnect the battery module circuit, so as not to damage the power module due to the low voltage; if it is detected that the power supply of the power module is restored, the power module connects the battery module to charge the battery module.

Furthermore, the battery module is directly connected in parallel with the power module without DCDC power conversion; the battery module is always connected in parallel with the power module power supply except for automatically disconnecting the charging and discharging port of the battery module when the voltage is too low and disconnecting after completing data transfer.

Further, the voltage difference between the minimum operating voltage of the server controller module and the non-volatile storage module and the rated output voltage of the power supply module is the discharge voltage of the battery module; The power released at the lowest operating voltage can ensure that the server controller module will drop all cached data into the non-volatile memory module.

Furthermore, the battery module is always connected to the power supply module during the operation of the device, and when the battery voltage of the battery module is lower than the power module, the battery module is automatically charged and always maintains a fully charged state.

In order to achieve the purpose of the present invention, the present invention also discloses a storage server power-down protection method, comprising the following steps:

Step 1. When the external power module loses power abnormally, the battery module connected in parallel with the power module is automatically discharged to maintain the normal operation of the server controller module and the flash memory of the non-volatile storage module;

Step 2. When the power detection module detects that the power module is abnormally powered off, it sends a power-off signal to the server controller module. After receiving the signal, the server controller module stops the data receiving service, drops the data into the disk until it is completed, and then starts to shut down ;

Step 3. After the shutdown is completed, the server controller module feeds back a data transfer completion signal to the power detection module. After receiving the signal, the power detection module cuts off the power output of the battery module to reduce battery loss;

Step 4. When the power detection module does not receive the data transfer completion signal and detects that the voltage of the battery module is lower than the predetermined value, it automatically cuts off the power output of the battery module to prevent the low voltage from damaging other power consumption modules.

Further, the power detection circuit is powered by the power module and the battery module at the same time, and one of the power module and the battery module can provide power normally to ensure the operation of the power detection circuit; when the power detection module detects that the power module is restored to power, it is automatically connected The battery module power supply, on the one hand, can charge the battery module, and on the other hand, the battery module enters the normal working mode to prevent the power module from losing power again.

Compared with the prior art, the significant progress of the present invention lies in: 1) When the storage server is abnormally powered off, the battery module power supply can seamlessly release the electric energy, maintain the server server controller module to continue running, and write the cached data into the persistent storage module In the process of ensuring data integrity and consistency, the power supply switching process utilizes the battery charge and discharge characteristics and the difference in the working voltage range of each module, without the need for a detection circuit and a DCDC power conversion module, and the circuit is simple and reliable; 2) The battery module of the present invention has a large capacity, It can maintain data directly stored in the non-volatile storage module without data recovery, good versatility, and does not require DCDC power conversion circuit; 3) It uses battery module for power supply and can be adapted to general storage servers.

In order to more clearly illustrate the functional characteristics and structural parameters of the present invention, further description will be given below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of a system architecture of a storage server power-down protection device;

Fig. 2 is a working flow schematic diagram of a storage server power-down protection method;

FIG. 3 is a schematic workflow diagram of a storage server power-down protection method.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them; based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1 , the storage server abnormal power failure protection device of the present invention includes five parts: a power supply module, a power supply detection module, a battery module, a server controller module, and a non-volatile storage module. Among them: the power supply module provides power for all parts of the system, including the server controller module and the non-volatile storage module, and charges the battery module when it is not fully charged.

The power detection module is responsible for the status detection of the power module and battery module, including whether the power module is normal, if a power failure event is detected, it sends a signal to the server controller module for data storage, and disconnects the battery module circuit when the voltage of the battery module is too low. In order to avoid damage to the power module due to excessively low voltage, and when it is detected that the power supply of the power module is restored, the battery module is automatically connected for charging.

The battery module is responsible for providing power for the system when the power module is powered off. The batteries inside the battery module are simply connected in series and parallel, and are directly connected in parallel with the power module after passing through the electronic switch.

The server controller module is the protected object. When receiving the power-down signal of the power supply module sent by the power detection module, the server controller module will continue to run on the power provided by the battery module, stop the data receiving service, and store the data in the cache in the non-volatile memory module.

The non-volatile storage module is responsible for storing data, and when a power-off event occurs, the server controller module stores the cached data in the non-volatile storage module.

As shown in Figure 2, the workflow after an abnormal power failure occurs. The power detection module continuously detects the working status of the power module. Once a power failure event is detected, it enters the power failure protection mode:

When the external power module is abnormally powered off, the battery module connected in parallel with the power module is automatically discharged to maintain the normal operation of the server controller module and the non-volatile flash memory.

When the power detection module detects that the power module is abnormally powered off, it sends a power-off signal to the server controller module. After receiving the signal, the server controller module stops the data receiving service, drops the data into the disk until it is completed, and then starts to shut down.

After the shutdown is completed, the server controller module feeds back the data transfer completion signal to the power detection module, and the power detection module cuts off the power output of the battery module after receiving the signal to reduce battery loss;

When the power detection module does not receive the data transfer completion signal and detects that the voltage of the battery module is lower than the predetermined value, it automatically cuts off the power output of the battery module to prevent the low voltage from damaging other power consumption modules;

As shown in Figure 3, the workflow after power on is as follows:

The power detection circuit is powered by the power module and the battery module at the same time, and one of the power module and the battery module can provide power normally to ensure the operation of the power detection circuit; when the power detection module detects that the power module is powered on again, it will automatically turn on the power of the battery module On the one hand, the battery module can be charged, on the other hand, the battery module enters a normal working mode to prevent the power module from being powered off again.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. A power failure protection device for a storage server is characterized by comprising a power supply module, a power supply detection module, a battery module, a server controller module and a nonvolatile storage module; the power supply module is connected with the nonvolatile memory module and the server controller module in parallel through power lines; the battery module is directly connected in parallel with the power supply module after passing through the electronic switch; the server controller module and the nonvolatile memory module transmit and store data through a signal line, the power supply detection module acquires working states of the power supply module and the battery module through the signal line, and the power supply detection module sends a tray-falling instruction to the server controller module through the signal line;

the power supply module is used for supplying power to the server controller module and the nonvolatile storage module; the power supply detection module is used for detecting the state of the battery module; if the power failure of the power supply module is detected, a signal is sent to the server controller module for data destaging, meanwhile, the battery module automatically starts to supply power, the server controller module continues to operate by depending on the power supply provided by the battery module, the data receiving service is stopped, and the data in the cache is stored in the nonvolatile storage module; if the voltage of the battery module is detected to be too low, the circuit of the battery module is disconnected so as to prevent the too low voltage from damaging the power utilization module; and if the power supply module is detected to recover power supply, the power supply module is connected with the battery module to charge the battery module.

2. The storage server power-down protection device according to claim 1, wherein the battery module is directly connected in parallel with the power module without being converted by a DCDC power supply; the battery module is always connected with the power supply of the power supply module in parallel except that the battery module automatically disconnects a charging and discharging port when the voltage is too low and disconnects after data falling is completed.

3. The storage server power-fail protection device of claim 1, wherein the voltage difference between the lowest operating voltage of the server controller module and the nonvolatile storage module and the rated output voltage of the power module is the discharge voltage of the battery module; the electric quantity released when the battery module is discharged from the rated voltage to the lowest voltage at which other modules of the device can work normally can ensure that the server controller module falls all the cache data into the nonvolatile storage module.

4. The power-fail safeguard device for the storage server of claim 1, wherein the battery module is always connected to the power supply of the power module during the operation of the device, and when the battery voltage of the battery module is lower than that of the power module, the battery module is automatically charged and always keeps in a full-power state.

5. A storage server power-down protection method based on the storage server power-down protection device of claims 1-4 is characterized by comprising the following steps:

step 1, when an external power supply module is abnormally powered down, a battery module connected with the power supply module in parallel automatically discharges to maintain normal operation of a server controller module and a flash memory of a nonvolatile storage module;

step 2, when the power supply detection module detects abnormal power failure of the power supply module, a power failure signal is sent to the server controller module, the server controller module stops data receiving service after receiving the signal, data falls into a disk until the completion, and then the shutdown is started;

step 3, after the shutdown is completed, the server controller module feeds back a data tray falling completion signal to the power supply detection module, and the power supply detection module cuts off the power supply output of the battery module after receiving the signal, so that the battery loss is reduced;

and 4, when the power supply detection module does not receive the data tray falling completion signal and detects that the voltage of the battery module is lower than a preset value, automatically cutting off the power supply output of the battery module to prevent low voltage from damaging other power utilization modules.

6. The storage server power-down protection method according to claim 5, wherein the power detection circuit is powered by both the power module and the battery module, and the power detection circuit can be guaranteed to operate if one of the power module and the battery module can normally provide power; when the power detection module detects that the power module is electrified again, the power supply of the battery module is automatically switched on, so that the battery module can be charged on one hand, and the battery module enters a normal working mode on the other hand, and the power module is prevented from being powered down again.

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