Shulou(Shulou.com)06/02 Report--

Situation:

Home:500Groot:50Groot partitions are not enough

Idea: divide part of the space of home partition to root partition

# set home partition size to 200G, free 300G space $lvreduce-L 200G / dev/centos/home# extend free space to root partition $lvextend-l + 100%FREE / dev/centos/root# use command set included with XFS file system to increase partition space $xfs_growfs / dev/mapper/centos-root

Example

Situation

The partition / dev/mapper/centos-root mounted in the root directory is full and occupies 100%

Df-hFilesystem Size Used Avail Use% Mounted on/dev/mapper/centos-root 50G 50G 19m / devtmpfs 32G 032G 0% / devtmpfs 32G 0 32G 0 / dev/shmtmpfs 32G 2.5G 29G 8% / runtmpfs 32G 032G 0% / sys/fs/cgroup/dev/mapper/centos-home 476G 33M 476G 1% / home/dev/sda1 497M 238M 259M 48% / boottmpfs 6.3G 0 6.3G 0% / run/user/0

Analyze

The partition space mounted in the root directory is too small, only 50 gigabytes, while the server home directory is a very useful directory, hanging in nearly 500g of space.

Idea: set aside 300G space from centos-home partition to centos-root partition.

Operation

1. View each partition information

$lvdisplay--- Logical volume-LV Path / dev/centos/homeLV Name homeVG Name centosLV UUID 1fAt1E-bQsa-1HXR-MCE2-5VZ1-xzBz-iI1SLvLV Write Access read/writeLV Creation host, time localhost 2016-10-26 17:23:47 + 0800LV Status available# open 0LV Size 475.70 GiBCurrent LE 121778Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253 Logical volume-LV Path / dev/centos/rootLV Name rootVG Name centosLV UUID lD64zY-yc3Z-SZaB-dAjK-03YM-2gM8-pfj4ooLV Write Access read/writeLV Creation host, time localhost 2016-10-26 17:23:48 + 0800LV Status available# open 1LV Size 50.00 GiBCurrent LE 12800Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253purl 0

two。 Reduce / home partition SPAC

# release / dev/centos/home partition 300G space # command set / dev/centos/home partition 200G space $lvreduce-L 200G / dev/centos/homeWARNING: Reducing active logical volume to 200.00 GiB. THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce centos/home? Y Size of logical volume centos/home changed from 475.70 GiB (121778 extents) to 200.00 GiB (51200 extents). Logical volume centos/home successfully resized.

3. Increase / root partition space

$lvextend-l + 100%FREE / dev/centos/rootSize of logical volume centos/root changed from 50.06 GiB (12816 extents) to 325.76 GiB (83394 extents). Logical volume centos/root successfully resized.

4. Expand XFS file space size

$xfs_growfs / dev/mapper/centos-rootmeta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=3276800 blks = sectsz=512 attr=2, projid32bit=1 = crc=0 finobt=0 spinodes=0data = bsize=4096 blocks=13107200, imaxpct=25 = sunit=0 swidth=0 blksnaming = version 2 bsize=4096 ascii-ci=0 ftype=0log = internal bsize=4096 blocks=6400, version=2 = sectsz=512 sunit=0 blks, lazy-count=1realtime = none extsz=4096 blocks=0, rtextents=0data blocks changed from 13107200 to 85395456

Complete

The above is the whole content of this article, I hope it will be helpful to your study, and I also hope that you will support it.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.