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This article mainly introduces how to expand the partition capacity under linux, the article is very detailed, has a certain reference value, interested friends must read it!

In daily work, we often encounter the problem of insufficient remaining capacity of a partition, so we need to master how to expand the partition under linux server. For partition expansion, there are two cases

Expansion of LVM partitions

Expansion of Non-LVM Partitions

Expansion of LVM partitions

In general, we recommend using LVM to facilitate Auto Scaling of partitions. For an introduction to LVM, physical volumes, logical groups, logical volumes, etc., I won't go into detail here. You can go to my other two articles on LVM.

Scenario: The/www directory is our directory related to the website. The partition mounted in this directory uses LVM. Originally, this directory has a space size of 1G, but with the operation of the system, the remaining space is less than 100M. The partition now needs to be expanded.

Preparation, implementation of scenarios

# pvcreate /dev/sdb1# vgcreate vgwww /dev/sdb1# lvcreate -l 255 vgwww# mkfs.ext4 /dev/vgwww/lvol0 # mount /dev/vgwww/lvol0 /www# dd if=/dev/zero of=/www/bigfile bs=1M count=900# df -h……/dev/mapper/vgwww-lvol0 988M 903M 19M 98% /www

the partition expansion

First of all, we have to see if there is any space left in vgwww, if not, we need to add pv to vgwww first.

# vgdisplay vgwww …… Free PE / Size 0 / 0

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