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LVM Overview

<p class="shortdesc"></p> <p class="p">To use an EBS disk in Linux, you need to create partitions on the disk. As the demand for storage increases, the partition capacity will become insufficient. When the capacity is insufficient, you can expand it by replacing original partitions (for more information, see <a class="xref" href="https://pinganyun.com/ssr/help/storage/ebs/manual.expand.exconsole" target="_blank">Expand EBS Disk Capacity</a>). This method is rather complex, because you have to go through data backup, disk clearance, repartition, data recovery, etc. Besides, services will be interrupted. </p> <p class="p">When EBS disks are managed with LVM, file systems can be distributed on multiple EBS disks and expanded dynamically. Therefore, file system spaces will no longer be limited by EBS disk capacities. </p> <p class="p">Logical Volume Manager (LVM) is a mechanism used for managing disk partitions in Linux. LVM is a logical layer built between EBS disks and partitions. It can integrate several physical disk partitions into a whole Volume Group (VG) to form a storage pool and then create Logical Volumes (LV) in the volume group. In this way, it can dynamically adjust the volume size online and improve the flexibility of disk partition management.</p>
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