CN113031879A - Cluster storage method based on LVM logic - Google Patents

Abstract

The invention discloses a cluster storage method based on LVM logic, which comprises the following steps: forming an LVM logic area by a plurality of hard disks, and carrying out mirror image processing on each LVM logic area; installing an OSD program on the LVM logic area, and mounting the LVM logic area on a CEPH cluster storage system; if any hard disk in the LVM logic area sends a damage condition, or any hard disk needs to be actively replaced, the hard disk is replaced to obtain a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs mirroring operation on the new hard disk for data recovery; and when a hard disk needs to be newly added in the LVM logic area, performing LVM logic on the newly added hard disk and obtaining a new LVM logic area. The method and the device can enable the ceph cluster to perform capacity expansion and hard disk removal without perception.

Description

Cluster storage method based on LVM logic

Technical Field

The invention relates to the technical field of distributed storage, in particular to a cluster storage method based on LVM logic.

Background

With the development of cloud computing in the internet, distributed ceph storage is recognized and widely used by people, and when capacity expansion is performed on a ceph cluster which is deployed at present, each factory enterprise has a self-owned mode to perform capacity expansion.

The Ceph cluster is a uniform distributed object storage, and for a deployed storage cluster, capacity expansion is needed if the space is insufficient, or capacity expansion is needed after elimination if a disk is bad.

In the prior art, the operations of expanding a hard disk or removing the hard disk all result in the process of performing data balanced migration on the existing ceph cluster, so that the pressure of a data disk is increased, and the flow of data migration performs resource preemption (such as network bandwidth and disk performance) with the normal service data flow.

Disclosure of Invention

In order to solve one of the problems, the invention provides a cluster storage method based on LVM logic, which forms an LVM logic area by performing LVM logic processing on a hard disk, solves the problem of sudden performance increase caused by the replacement or addition of the hard disk of a subsequent ceph cluster, and can expand the capacity and remove the hard disk of the ceph cluster without perception.

In order to solve the technical problems, the invention provides the following technical scheme: a cluster storage method based on LVM logic comprises the following steps:

performing LVM logic processing on a plurality of hard disks to form an LVM logic area, and performing mirror image processing on each LVM logic area to obtain an LVM logic mirror image corresponding to each LVM logic area;

installing an OSD program on the LVM logic area, and mounting the LVM logic area on a CEPH cluster storage system; the CEPH cluster storage system comprises a plurality of LVM logical zones.

Further, the cluster storage method based on the LVM logic further includes the steps of:

if any hard disk in the LVM logic area sends a damage condition, the damaged hard disk is replaced by a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs mirroring operation on the new hard disk for recovering data;

or, if any hard disk in the LVM logic area needs to be actively replaced, the hard disk is replaced to obtain a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs a mirroring operation on the new hard disk for data recovery.

Further, the cluster storage method based on the LVM logic further includes the steps of:

when a new hard disk is needed to be added in the LVM logic area, performing LVM logic on the added hard disk to obtain a new LVM logic area, and performing mirror image processing on the corresponding LVM logic mirror image of the added hard disk.

After the technical scheme is adopted, the invention at least has the following beneficial effects: according to the invention, the LVM logic processing is carried out on the hard disk to form an LVM logic area, so that the Ceph cluster layer can carry out hard disk capacity expansion or damaged hard disk replacement without perception or in a seamless manner, and the storage efficiency of the Ceph cluster is greatly improved.

Drawings

Fig. 1 is a flowchart illustrating steps of a cluster storage method based on LVM logic according to the present invention.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application is further described in detail with reference to the drawings and specific embodiments.

Example 1

As shown in fig. 1, this embodiment provides a cluster storage method based on LVM logic, which includes the steps of:

step S1, performing LVM logic processing on the plurality of hard disks to form an LVM logic area, and performing mirror image processing on each LVM logic area to obtain an LVM logic mirror image corresponding to each LVM logic area; here, a plurality of hard disks on the device are combined into an LVM, and an LVM mirror mode is configured (when a plurality of hard disks synchronize data, even if a disk is lost, the disk data is guaranteed to be redundant due to the mirror mode); in addition, LVM refers to: the LVM is a shorthand of Logical Volume Manager (Logical Volume management), and is a mechanism for managing disk partitions in a Linux environment, and is implemented by Heinz mauelhagen on a Linux 2.4 kernel, and the latest version at present is: stable version 1.0.5, development version 1.1.0-rc2, and LVM2 development version;

step S2, installing an OSD program on the LVM logic area, and mounting the LVM logic area on a CEPH cluster storage system; the CEPH cluster storage system comprises a plurality of LVM logic areas;

step S3, if any hard disk in the LVM logic area sends a damage condition, the damaged hard disk is replaced by a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs mirror image operation on the new hard disk for data recovery;

or if any hard disk in the LVM logic area needs to be actively replaced, replacing the hard disk to obtain a new hard disk, and performing mirroring operation on the new hard disk by using the LVM logic mirror corresponding to the LVM logic area for data recovery;

step S4, when a new hard disk needs to be added to the LVM logic area, performing LVM logic on the new hard disk to obtain a new LVM logic area, and performing mirror image processing on the corresponding LVM logic mirror image of the new hard disk.

In this embodiment, by increasing the logical protection of the LVM, the ceph cluster is seamlessly docked to expand/reduce the capacity (reject the hard disk, reduce the hard disk), so that the performance sudden increase caused by the data synchronization required by the ceph cluster due to the hard disk problem is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims (3)

1. A cluster storage method based on LVM logic is characterized by comprising the following steps:

performing LVM logic processing on a plurality of hard disks to form an LVM logic area, and performing mirror image processing on each LVM logic area to obtain an LVM logic mirror image corresponding to each LVM logic area;

installing an OSD program on the LVM logic area, and mounting the LVM logic area on a CEPH cluster storage system; the CEPH cluster storage system comprises a plurality of LVM logical zones.

2. The cluster storage method based on LVM logic according to claim 1, further comprising the steps of:

if any hard disk in the LVM logic area sends a damage condition, the damaged hard disk is replaced by a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs mirroring operation on the new hard disk for recovering data;

or, if any hard disk in the LVM logic area needs to be actively replaced, the hard disk is replaced to obtain a new hard disk, and the LVM logic mirror corresponding to the LVM logic area performs a mirroring operation on the new hard disk for data recovery.

3. The cluster storage method based on LVM logic according to claim 2, further comprising the steps of:

when a new hard disk is needed to be added in the LVM logic area, performing LVM logic on the added hard disk to obtain a new LVM logic area, and performing mirror image processing on the corresponding LVM logic mirror image of the added hard disk.

Images