CN108874320A - Simplification volume setting method, device, equipment and computer readable storage medium - Google Patents

Abstract

The invention discloses a thin volume setting method, device, equipment and computer-readable storage medium; after receiving the setting instruction, the solution will create an empty data object associated with the thin volume, and the empty data object has been Filling, occupying storage space, that is, the thin volume has been converted into a normal volume in essence; therefore, when subsequent IO operations are performed on the original thin volume, there is no need to allocate space, and the corresponding operation can be directly performed on the newly created empty data object. In this way, even if the overall storage is full, the thin volume still has available free space capacity, and there will be no over-capacity allocation.

Description

Thin volume setting method, device, equipment and computer-readable storage medium

technical field

The present invention relates to the technical field of thin volume configuration, and more specifically, relates to a thin volume configuration method, device, equipment and computer-readable storage medium.

Background technique

A thin volume is a volume with thin provisioning, and a normal volume is a volume without thin provisioning. Each volume can be regarded as a logical disk, which can be a logical disk of a physical hard disk, that is, the drive letters of D disk and E disk we see directly, or it can be composed of two hard disks or part of the space of two hard disks RAID 0 or RAID 1 arrays, or more hard disks to form other RAID 5 arrays, but all appear to be one local disk. Thin provisioning is a new capacity allocation technology. It does not allocate too much space to an application at one time, but allocates it to the application in small quantities multiple times according to the actual capacity required by the application. When the data generated by this application grows and the allocated capacity space is not enough, the system will allocate a part of the storage space again from the back-end storage pool.

Since a thin volume is a volume with automatic thin provisioning, the physical space of the disk will not be occupied when the size of the volume is initially allocated, and the physical space of the disk will be gradually occupied as the thin volume is used. For example, allocate a 10TB thin volume. At this time, the actual physical space occupied by the volume is 0, and as the volume is used, the volume will gradually occupy the actual physical space. However, ordinary volumes do not have thin provisioning. When the size of the volume is initially allocated, the disk space is already occupied. Therefore, its space occupation can be perceived after the allocation is completed. At present, these two volumes are relatively independent and have no ability to convert each other. And in most environments, users use thin volumes. However, although thin provisioning saves space, it is very easy to over-allocate during use. It is easy to re-allocate space when the cluster has no actual space, resulting in unavailable storage. And when the storage is full, many thin volumes are not yet full, and each thin volume can no longer perform IO.

Contents of the invention

The purpose of the present invention is to provide a thin volume setting method, device, equipment and computer-readable storage medium, so as to avoid excessive capacity allocation of the thin volume, resulting in that the thin volume cannot perform IO operations when the storage is full.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

A thin volume setting method, comprising:

Receive setup instructions to convert a thin volume to a normal volume;

Create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume;

The empty data object is filled, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object.

Wherein, according to the remaining space capacity of the thin volume, an empty data object associated with the thin volume is created, including:

Determine the total space capacity and the used space capacity of the thin volume;

calculating the remaining space capacity of the thin volume according to the total space capacity and the used space capacity;

Create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume.

Wherein, according to the remaining space capacity of the thin volume, an empty data object associated with the thin volume is created, including:

According to the remaining space capacity of the thin volume, create an empty data object named in the same manner as the original data object of the thin volume.

Wherein, the filling the empty data object includes: performing a filling operation on the empty data object by using a Truncate algorithm.

A thin volume setting device, comprising:

An instruction receiving module, configured to receive a setting instruction for converting a thin volume into an ordinary volume;

An object creation module, configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume;

A filling module, configured to fill the empty data object, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object.

Wherein, the object creation module includes:

Determining a unit, used to determine the total space capacity and used space capacity of the thin volume;

a calculation unit, configured to calculate the remaining space capacity of the thin volume according to the total space capacity and the used space capacity;

The creation unit is configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume.

Wherein, the creation unit is specifically configured to create an empty data object named in the same manner as the original data object of the thin volume according to the remaining space capacity of the thin volume.

Wherein, the filling module is specifically configured to use the Truncate algorithm to perform filling operations on empty data objects.

A thin volume provisioning device comprising:

The memory is used to store the computer program; the processor is used to realize the steps of the above thin volume setting method when executing the computer program.

A computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above thin volume setting method are realized.

It can be known from the above solutions that a method for setting a thin volume provided by an embodiment of the present invention includes: receiving a setting instruction to convert a thin volume into a normal volume; filling the empty data object, so that the operation on the remaining space capacity of the thin volume is directly performed on the filled empty data object.

It can be seen that after receiving the setting instruction, this solution will create an empty data object associated with the thin volume. This empty data object has been filled and occupies storage space, that is, the thin volume has been converted into a normal volume in essence; therefore, When subsequent IO operations are performed on the thin volume, there is no need to allocate space, and the corresponding operations can be directly performed on the newly created empty data objects. In this way, even if the overall storage is full, the thin volume still has available free space capacity, and there will be no over-capacity allocation.

The invention also discloses a thin volume setting device, equipment and computer-readable storage medium, which can also achieve the above-mentioned technical effects.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a thin volume setting method disclosed in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a thin volume setting device disclosed in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the present invention discloses a thin volume setting method, device, equipment and a computer-readable storage medium, so as to avoid excessive capacity allocation of the thin volume, causing the thin volume to be unable to perform IO operations when the storage is full.

Referring to Figure 1, a thin volume setting method provided by an embodiment of the present invention includes:

S101. Receive a setting instruction for converting a thin volume into a normal volume;

Specifically, the setting instruction in this embodiment is an action triggered by the user to set the thin volume as a normal volume, and may include a switch or an instruction, for example: the switch is mainly an operation of the operation interface layer, and only the state of ON/OFF is changed , and the command refers to the command that needs to be input from the Linux command line.

S102. Create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume;

Wherein, according to the remaining space capacity of the thin volume, an empty data object associated with the thin volume is created, including:

Determine the total space capacity and the used space capacity of the thin volume;

calculating the remaining space capacity of the thin volume according to the total space capacity and the used space capacity;

According to the remaining space capacity of the thin volume, create an empty data object named in the same manner as the original data object of the thin volume.

Specifically, when each thin volume is created, there is no data object generated, but as data is written, data objects will be generated, generally one object per 4M. For example, a 10GB thin volume is created, and its actual capacity is only 0GB. At this time, 1GB of data is written into it, and (1024MB/4MB) objects are generated. At this time, the volume actually occupies 1GB of space.

In this embodiment, when creating an empty data object, it is necessary to obtain the total capacity of the thin volume and the used capacity of the thin volume, that is, the total space capacity and the used space capacity, and calculate the remaining space capacity of the thin volume; The calculation method of space capacity is: remaining space capacity = total volume capacity - volume used capacity. It can be understood that, in this embodiment, only one specific method for obtaining the remaining space capacity is listed, and other methods are also possible, for example, a method of directly obtaining the remaining space capacity of the thin volume through a program, etc., which are not specifically limited here.

After determining the remaining space capacity of the thin volume, an empty data object can be created according to the naming method of the data object of the original thin volume and the remaining space of the volume, that is, the naming method of the newly created empty data object is the same as the data object of the original thin volume are named in the same way. Through this naming method, the association relationship between the newly created empty data object and the thin volume can be realized, so that the newly created data object complies with the search rules of the thin volume, so that it can find the newly created object when performing subsequent operations on the thin volume. data object.

S103. Fill the empty data object, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object.

Wherein, the filling the empty data object includes: performing a filling operation on the empty data object by using a Truncate algorithm.

Specifically, after an empty data object is created, the empty data object has no capacity and its size is 0. In order to allow the empty data object to occupy storage space, Truncate can be used to fill up the logical capacity of the remaining space of the volume. At this time, if you check the volume again, its nature has become a normal volume, that is to say, the total capacity of the original thin volume has been filled. It should be noted that the filling of the empty data object is to occupy this part of the space first, but there is no data in reality. When writing data later, this data object can be overwritten. After filling in this way, the volume will be reduced The remaining space is seen and will not be allocated by the administrator.

To sum up, it can be seen that in the thin volume setting method provided in this embodiment, an empty object is created in the remaining capacity of the thin volume according to the naming method of the thin volume object in the distributed storage, and the object file is truncate , fill the remaining space, so that the logical capacity of the thin volume is filled (the physical capacity is not filled), and space is reserved for subsequent IO. Because the created object conforms to the naming method of the original thin volume object, the subsequent IO is overwritten based on the created object, so as to prevent the thin volume volume from being half written and unable to perform IO because the overall storage is full.

The thin volume setting device provided in the embodiment of the present invention is introduced below, and the thin volume setting device described below and the thin volume setting method described above may refer to each other.

Referring to Figure 2, a thin volume setting device provided by an embodiment of the present invention includes:

An instruction receiving module 100, configured to receive a setting instruction for converting a thin volume into an ordinary volume;

An object creation module 200, configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume;

The filling module 300 is configured to fill the empty data object, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object.

Wherein, the object creation module includes:

Determining a unit, used to determine the total space capacity and used space capacity of the thin volume;

a calculation unit, configured to calculate the remaining space capacity of the thin volume according to the total space capacity and the used space capacity;

The creation unit is configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume.

Wherein, the creation unit is specifically configured to create an empty data object named in the same manner as the original data object of the thin volume according to the remaining space capacity of the thin volume.

Wherein, the filling module is specifically configured to use the Truncate algorithm to perform filling operations on empty data objects.

The embodiment of the present invention also provides a thin volume setting device, including:

The memory is used to store the computer program; the processor is used to implement the steps of the above embodiment of the thin volume setting method when executing the computer program.

An embodiment of the present invention also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the above embodiments of the thin volume setting method are implemented.

Wherein, the storage medium may include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc., which can store program codes. medium.

To sum up, it can be seen that the thin volume setting device, equipment, and computer-readable storage medium provided in this embodiment can create empty objects in the remaining capacity of the thin volume according to the naming method of the thin volume objects, and store the objects File truncate, filling the remaining space. The logical capacity of the thin volume is filled (the physical capacity is not filled), and space is reserved for subsequent IO. Because the created object conforms to the naming method of the original thin volume object, the subsequent IO is overwritten based on the created object, so as to prevent the thin volume volume from being half written and unable to perform IO because the overall storage is full.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A thin volume setting method is characterized in that, comprising: Receive setup instructions to convert a thin volume to a normal volume; Create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume; The empty data object is filled, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object. 2. The thin volume setting method according to claim 1, wherein, according to the remaining space capacity of the thin volume, creating an empty data object associated with the thin volume comprises: Determine the total space capacity and the used space capacity of the thin volume; calculating the remaining space capacity of the thin volume according to the total space capacity and the used space capacity; Create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume. 3. The thin volume setting method according to claim 2, wherein, according to the remaining space capacity of the thin volume, creating an empty data object associated with the thin volume comprises: According to the remaining space capacity of the thin volume, create an empty data object named in the same manner as the original data object of the thin volume. 4. The thin volume setting method according to any one of claims 1 to 3, wherein the filling the empty data object comprises: Use the Truncate algorithm to perform filling operations on empty data objects. 5. A thin volume setting device, characterized in that it comprises: An instruction receiving module, configured to receive a setting instruction for converting a thin volume into an ordinary volume; An object creation module, configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume; A filling module, configured to fill the empty data object, so that operations on the remaining space capacity of the thin volume are directly performed on the filled empty data object. 6. The thin volume setting device according to claim 5, wherein the object creation module includes: Determining a unit, used to determine the total space capacity and used space capacity of the thin volume; a calculation unit, configured to calculate the remaining space capacity of the thin volume according to the total space capacity and the used space capacity; The creation unit is configured to create an empty data object associated with the thin volume according to the remaining space capacity of the thin volume. 7. The device for configuring a thin volume according to claim 6, wherein the creating unit is specifically configured to create an empty volume with the same name as the original data object of the thin volume according to the remaining space capacity of the thin volume. data object. 8. The thin volume setting device according to any one of claims 5 to 7, wherein the filling module is specifically configured to use a Truncate algorithm to perform filling operations on empty data objects. 9. A device for setting thin volumes, comprising: memory for storing computer programs; A processor, configured to implement the steps of the thin volume setting method according to any one of claims 1 to 4 when executing the computer program. 10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the thin volume according to any one of claims 1 to 4 is implemented. Steps to set up the method.