CN113704022B - Periodic asynchronous remote copying method, device, equipment and storage medium - Google Patents
Periodic asynchronous remote copying method, device, equipment and storage medium Download PDFInfo
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
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Abstract
The method can flexibly set the period of asynchronous remote copying according to the real-time traffic of a host, sets a short period to avoid data loss when the traffic is large, and sets a long period to avoid introducing unnecessary calculated amount when the traffic is small. In addition, the application also provides a periodic asynchronous remote copying device, equipment and a readable storage medium, and the technical effects of the periodic asynchronous remote copying device and the equipment correspond to those of the method.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for periodic asynchronous remote copy.
Background
Existing storage application fields such as banks, the internet and the like have very different traffic volumes at different times of day. The asynchronous remote copying period in the current storage system mainly has two setting methods, one is used for setting a fixed period to carry out data synchronization, and the other is used for manually setting different periods according to business requirements. These two methods have the following disadvantages, respectively:
the fixed period mode does not need manual adjustment any more, but if the period setting time is short, frequent asynchronous remote copying can cause a lot of unnecessary calculation amount (such as checking starting conditions when starting asynchronous remote copying, etc.) when the traffic volume is small or even no traffic operation is performed; if the period setting time is long, when the traffic is large, the asynchronous remote copy needs a large amount of incremental data synchronously, and if the master fails before the asynchronous remote copy is started in the next period, the data is lost. The method of manually setting the synchronization period according to the business needs can take up manpower, resulting in higher cost.
In summary, how to provide an asynchronous remote copy scheme, which overcomes the drawbacks of the two methods described above, is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a periodic asynchronous remote copying method, a device, equipment and a readable storage medium, which are used for solving the problems that the current periodic asynchronous remote copying scheme either sets a fixed period to cause data loss or increases unnecessary calculation amount or relies on manual setting of the period to cause higher cost. The specific scheme is as follows:
in a first aspect, the present application provides a periodic asynchronous remote copy method, including:
s1, determining real-time traffic of a first host;
s2, determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic; in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period;
and S3, controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the round reaches a preset time threshold, and returning to S1 to enter the next round of asynchronous remote copy.
Optionally, the determining the target period of asynchronous remote copy using the target formula includes:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, where S is a preset constant, t_max and t_min are respectively the maximum and minimum values of the period of asynchronous remote copy, q_max and q_min are respectively the maximum and minimum values of the traffic, and Q is the real-time traffic.
Optionally, the determining the target period of asynchronous remote copy using the target formula includes:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, wherein a preset constant s= (t_max×q_max-t_min×q_min)/(q_max-q_min).
Optionally, before the determining the target period of asynchronous remote copy by using the target formula, the method further includes:
acquiring historical traffic data of the first host; and determining the maximum value and the minimum value of the traffic according to the historical traffic data.
Optionally, the determining the target period of asynchronous remote copy using the target formula includes:
and determining a target period of asynchronous remote copy by using a target formula, and if the value of the target period is not an integer, rounding down the value of the target period.
Optionally, the controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period includes:
controlling the first host to asynchronously and remotely copy service data to a second host according to the target period, and checking starting conditions of the first host and the second host before each asynchronous remote copy execution, wherein the starting conditions comprise: whether the first host and the second host are in a periodic asynchronous remote copy relationship and/or whether the communication links of the first host and the second host are normal.
Optionally, the controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period includes:
acquiring a current period of asynchronous remote copy of the first host;
judging whether the current period is equal to the target period or not;
if the service data is equal to the target period, sending an instruction for continuing asynchronous remote copying according to the current period to the first host, so as to control the first host to asynchronously and remotely copy the service data to a second host according to the target period;
if not, a period updating instruction carrying the target period is sent to the first host computer so as to control the first host computer to asynchronously and remotely copy the service data to the second host computer according to the target period.
In a second aspect, the present application provides a periodic asynchronous remote copy apparatus comprising:
the traffic determining module is used for determining the real-time traffic of the first host;
the period calculation module is used for determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic; in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period;
and the control module is used for controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the round reaches a preset time threshold value, and returning to the service volume determining module to enter the next round of asynchronous remote copy.
In a third aspect, the present application provides a periodic asynchronous remote copy device comprising:
a memory: for storing a computer program;
a processor: for executing the computer program to implement the periodic asynchronous remote copy method as described above.
In a fourth aspect, the present application provides a readable storage medium for storing a computer program for implementing a periodic asynchronous remote copy method as described above when executed by a processor.
The periodic asynchronous remote copying method provided by the application comprises the following steps: determining real-time traffic of a first host; determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic; and controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the current round reaches a preset time threshold value, and entering the next round of asynchronous remote copy. In the above target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period.
Therefore, the method can flexibly set the period of asynchronous remote copying according to the real-time traffic of the host, set a short period to avoid data loss when the traffic is large, and set a long period to avoid introducing unnecessary calculation amount when the traffic is small.
In addition, the present application further provides a periodic asynchronous remote copy device, a device and a readable storage medium, where technical effects of the device and the device correspond to technical effects of the method described above, and are not repeated herein.
Drawings
For a clearer description of embodiments of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some embodiments of the present application, and that other drawings may be obtained from these drawings by a person of ordinary skill in the art without inventive effort.
FIG. 1 is a flowchart of a first embodiment of a periodic asynchronous remote copy method provided herein;
FIG. 2 is a flowchart of a second embodiment of a periodic asynchronous remote copy method provided herein;
FIG. 3 is a flowchart of an embodiment of a practical application of the periodic asynchronous remote copy method provided in the present application;
FIG. 4 is a functional block diagram of an embodiment of a periodic asynchronous remote copy device provided herein;
FIG. 5 is a schematic diagram of an embodiment of a periodic asynchronous remote copy device provided herein.
Detailed Description
The core of the application is to provide a periodic asynchronous remote copying method, a device, equipment and a readable storage medium, which can automatically realize flexible adjustment of the period of asynchronous remote copying according to the traffic of a host, avoid the problem of data loss, reduce the labor cost and improve the execution efficiency.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the following, an embodiment of a periodic asynchronous remote copy method provided in the present application is described, referring to fig. 1, where the embodiment includes:
s11, determining real-time traffic of a first host;
s12, determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic;
and S13, controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the current round reaches a preset time threshold, and returning to S11 to enter the next round of asynchronous remote copy.
The present embodiment aims to automatically adjust the period of asynchronous remote copy based on traffic. The asynchronous remote copy aims at realizing data synchronization, in the asynchronous remote copy, synchronous content is service data, and the synchronous process is as follows: the service data on the first host is asynchronously and remotely copied to the second host, i.e. the service data is synchronized from the first host to the second host.
In order to avoid system disturbance caused by frequent adjustment of the period, the embodiment sets a period of adjusting asynchronous remote copy once every preset time threshold, where the specific value of the preset time threshold can be set and adjusted according to actual requirements, and the embodiment is not limited to this.
To ensure that the adjusted period can overcome the disadvantages of easy loss of data and introduction of unnecessary computation, the present embodiment follows the following principle in adjusting the period of asynchronous remote copy according to real-time traffic: when the traffic is large, the asynchronous remote copy period is adjusted to a shorter direction so as to avoid data loss; when the traffic is small, the period of asynchronous remote copy is adjusted to a longer direction to avoid introducing unnecessary computation. Therefore, in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period.
In practical application, in the process of controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period, before each asynchronous remote copy is executed, the first host and the second host are checked for starting conditions, and specific checking contents may include: whether the first host and the second host are in a periodic asynchronous remote copy relationship, whether the communication links of the first host and the second host are normal, whether the asynchronous remote copy relationship is in a consistency group, and the like.
On the basis, considering that the traffic volume is not changed basically in some time periods, in order to avoid frequently setting the same period, as a preferred implementation manner, after the target period of asynchronous remote copying is calculated by using a target formula, the embodiment compares the target period of asynchronous remote copying with the current period of asynchronous remote copying, judges whether the target period of asynchronous remote copying is consistent with the current period of asynchronous remote copying, and if and only if the target period of asynchronous remote copying is inconsistent with the current period of asynchronous remote copying, sends a period update instruction carrying the target period to the first host so as to control the first host to asynchronously and remotely copy the traffic data to the second host according to the target period. Conversely, when the two are consistent, no instruction can be sent to the first host, the first host judges whether a control instruction is received or not at intervals of the preset time interval, and if not, asynchronous remote copy is continuously executed according to the current period; a simple instruction, such as an instruction to continue asynchronous remote copy according to the current cycle, may also be sent like the first host to control the first host to asynchronously remote copy the service data to the second host according to the target cycle.
According to the periodic asynchronous remote copying method, the period of asynchronous remote copying can be flexibly set according to real-time traffic of a host, short period is set when the traffic is large so as to avoid data loss, long period is set when the traffic is small so as to avoid introducing unnecessary calculated amount, and the period adjustment mode does not occupy extra manpower, so that the labor cost can be saved, and the asynchronous remote copying efficiency can be improved.
The following begins to describe in detail the second embodiment of the periodic asynchronous remote copy method provided in the present application, referring to fig. 2, where the second embodiment specifically includes:
s21, acquiring historical traffic data of a first host; determining maximum and minimum values of the traffic according to the historical traffic data;
s22, determining real-time traffic of the first host; acquiring a current period of asynchronous remote copy of a first host;
s23, determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic. If the calculated value of the target period is not an integer, rounding down the value of the target period.
The target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, where S is a preset constant, t_max and t_min are respectively the maximum and minimum values of the period of asynchronous remote copy, q_max and q_min are respectively the maximum and minimum values of the traffic, and Q is the real-time traffic.
As a specific embodiment, the preset constant may be as follows: s= (t_max_q_max-t_min q_min)/(q_max-q_min).
S24, judging whether the current period is equal to the target period or not; if yes, enter S25, otherwise enter S26;
s25, not sending any instruction to the first host, and continuously asynchronously and remotely copying the service data to the second host according to the current period when the first host detects that the first host does not receive the instruction;
s26, sending a period updating instruction carrying a target period to the first host, and enabling the first host to asynchronously and remotely copy the service data to the second host according to the target period according to the period updating instruction.
In S26 and S27, before each execution of asynchronous remote copy, a check of the start-up condition is made for the first host and the second host. The method mainly comprises the following examination contents:
(1) It is determined whether the remote copy relationship to be set for the period is a period asynchronous remote copy relationship (synchronous remote copy relationship, normal remote copy relationship, dual-active relationship are not required to be set for the period).
(2) It is checked whether the remote copy relationship is in a consistency group (consistency group: all remote copy relationships within the group are of the same type and the cycle time is the same).
(3) It is determined whether the data traffic of the receiving host is set at the first host or at the second host (typically at the first start-up).
(4) Whether the storage system is normal is judged, and if the first host or the second host is not in one system, whether the link between the two systems is normal is also required to be judged.
And S27, if the time of the asynchronous remote copying of the round reaches a preset time threshold, returning to S22 and entering the next round of asynchronous remote copying.
The method for periodic asynchronous remote copying provided by the embodiment establishes a periodic asynchronous remote copying relation, obtains the traffic of a host, calculates a new period according to the traffic, further judges whether the new period is the same as the current period time, and does not process if the new period is different and reset and is the same. In summary, the key points of this embodiment are 3: firstly, the asynchronous remote copy period can be flexibly set according to the traffic volume; secondly, reducing the data quantity lost when the host fails in the asynchronous remote copying process; thirdly, the manpower input is reduced, and the manpower cost is saved.
The periodic asynchronous remote copy method of the present application will be described below by taking practical application as an example.
In this application, the period of asynchronous remote copy is set with a corresponding range: minimum value t_min, maximum value t_max, in seconds. And counting historical traffic data of the host to obtain a maximum value Q_max and a minimum value Q_min of the traffic. The target period t when the real-time traffic is q is calculated according to the following formula:
t＝-(T_max-T_min)/(Q_max-Q_min)*q+(T_max*Q_max-T_min*Q_min)/(Q_max-Q_min)
the period size of asynchronous remote copy can only be set to be an integer, so the value of the target period t is set on the host after being taken to be an integer.
The cycle can be adjusted at intervals according to the actual situation, if the calculated target cycle t is inconsistent with the current cycle, the cycle is reset, and if the calculated target cycle t is consistent with the current cycle, no processing is performed. Here, taking the adjustment of the period every 2 hours as an example, the procedure is as follows:
step 1, setting an initial value of a period T of asynchronous remote copy, wherein the initial value is 300s;
step 2, obtaining the traffic q, and calculating a new asynchronous remote copy period according to a formula by rounding, and marking the new asynchronous remote copy period as t;
step 3, judging whether T is equal to T, if so, not performing any operation, and if not, updating T to be T;
and 4, carrying out asynchronous remote copying with t as a period, and returning to the step 2 after 2 hours.
The following describes a periodic asynchronous remote copy device provided in an embodiment of the present application, and the periodic asynchronous remote copy device described below and the periodic asynchronous remote copy method described above may be referred to correspondingly.
As shown in fig. 4, the periodic asynchronous remote copy apparatus of the present embodiment includes:
a traffic determining module 41, configured to determine real-time traffic of the first host;
a period calculation module 42, configured to determine a target period of asynchronous remote copy according to the real-time traffic using a target formula; in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period;
and the control module 43 is configured to control the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the current round reaches a preset time threshold, and return to the service volume determining module to enter the next round of asynchronous remote copy.
The periodic asynchronous remote copying apparatus of the present embodiment is used to implement the foregoing periodic asynchronous remote copying method, and thus the specific implementation of the apparatus can be seen from the foregoing example portions of the periodic asynchronous remote copying method, for example, the traffic determining module 41, the period calculating module 42, and the control module 43, which are respectively used to implement steps S11, S12, and S13 in the foregoing periodic asynchronous remote copying method. Therefore, the detailed description will be omitted herein with reference to the accompanying drawings, which illustrate examples of the respective parts.
In addition, since the periodic asynchronous remote copy apparatus of the present embodiment is used to implement the foregoing periodic asynchronous remote copy method, the functions thereof correspond to those of the foregoing method, and will not be described herein.
In addition, the present application further provides a periodic asynchronous remote copy device, as shown in fig. 5, including:
memory 100: for storing a computer program;
processor 200: for executing the computer program to implement the periodic asynchronous remote copy method as described above.
Finally, the present application provides a readable storage medium for storing a computer program for implementing a periodic asynchronous remote copy method as described above when executed by a processor.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The foregoing has outlined rather broadly the more detailed description of the present application and the principles and embodiments of the present application have been presented in terms of specific examples, which are provided herein to assist in the understanding of the method and core concepts of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (8)
1. A method for periodic asynchronous remote copy comprising:
s1, determining real-time traffic of a first host;
s2, determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic; in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period;
s3, controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the round reaches a preset time threshold, and returning to S1 to enter the next round of asynchronous remote copy;
wherein the determining the target period of asynchronous remote copy using the target formula comprises:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, where S is a preset constant, t_max and t_min are respectively the maximum value and the minimum value of the period of asynchronous remote copy, q_max and q_min are respectively the maximum value and the minimum value of the traffic, and Q is the real-time traffic;
the determining a target period of asynchronous remote copy using a target formula includes:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, wherein a preset constant s= (t_max×q_max-t_min×q_min)/(q_max-q_min).
2. The method of claim 1, further comprising, prior to said determining a target period of asynchronous remote copy using a target formula:
acquiring historical traffic data of the first host; and determining the maximum value and the minimum value of the traffic according to the historical traffic data.
3. The method of claim 1, wherein determining the target period of asynchronous remote copy using the target formula comprises:
and determining a target period of asynchronous remote copy by using a target formula, and if the value of the target period is not an integer, rounding down the value of the target period.
4. The method of claim 1, wherein controlling the first host to asynchronously and remotely copy traffic data to a second host in the target period comprises:
controlling the first host to asynchronously and remotely copy service data to a second host according to the target period, and checking starting conditions of the first host and the second host before each asynchronous remote copy execution, wherein the starting conditions comprise: whether the first host and the second host are in a periodic asynchronous remote copy relationship and/or whether the communication links of the first host and the second host are normal.
5. The method of any of claims 1 to 4, wherein controlling the first host to asynchronously and remotely copy traffic data to a second host in the target period comprises:
acquiring a current period of asynchronous remote copy of the first host;
judging whether the current period is equal to the target period or not;
if the service data is equal to the target period, sending an instruction for continuing asynchronous remote copying according to the current period to the first host, so as to control the first host to asynchronously and remotely copy the service data to a second host according to the target period;
if not, a period updating instruction carrying the target period is sent to the first host computer so as to control the first host computer to asynchronously and remotely copy the service data to the second host computer according to the target period.
6. A periodic asynchronous remote copy apparatus comprising:
the traffic determining module is used for determining the real-time traffic of the first host;
the period calculation module is used for determining a target period of asynchronous remote copy by utilizing a target formula according to the real-time traffic; in the target formula, the relationship between the real-time traffic and the target period is: the larger the real-time traffic, the shorter the target period; the smaller the real-time traffic, the longer the target period;
the control module is used for controlling the first host to asynchronously and remotely copy the service data to the second host according to the target period until the time of the asynchronous remote copy of the round reaches a preset time threshold value, and returning to the service volume determining module to enter the next round of asynchronous remote copy;
the period calculating module is specifically configured to:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, where S is a preset constant, t_max and t_min are respectively the maximum value and the minimum value of the period of asynchronous remote copy, q_max and q_min are respectively the maximum value and the minimum value of the traffic, and Q is the real-time traffic;
the period calculation module is specifically configured to:
determining a target period of asynchronous remote copy by using a target formula, wherein the target formula is as follows: t=s- (t_max-t_min)/(q_max-q_min) ×q, wherein a preset constant s= (t_max×q_max-t_min×q_min)/(q_max-q_min).
7. A periodic asynchronous remote copy device, comprising:
a memory: for storing a computer program;
a processor: for executing said computer program to implement the periodic asynchronous remote copy method of any of claims 1 to 5.
8. A readable storage medium for storing a computer program which, when executed by a processor, is adapted to implement the periodic asynchronous remote copy method of any of claims 1 to 5.
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| 异步远程复制协议的传播机制研究;王连臣等;软件导刊;第7卷(第6期);全文 * |
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