We keep most disk space on our server un-allocated and grow partitions as needed. Here’s how:
To see how much space is used:
root@tempest ~] df -H Filesystem Size Used Avail Use% Mountpoint /dev/mapper/vg_tempest-lv_root 42G 825M 39G 3% / none 34G 697k 34G 1% /dev/shm /dev/sda1 508M 87M 396M 18% /boot /dev/mapper/vg_tempest-lv_home 627G 576G 20G 97% /home /dev/mapper/vg_tempest-lv_students 52G 46G 3.0G 94% /students /dev/mapper/vg_tempest-lv_usr 17G 15G 925M 95% /usr /dev/mapper/vg_tempest-lv_var 49G 24G 22G 53% /var /dev/mapper/vg_tempest-lv_tmp 11G 159M 9.7G 2% /tmp bigdata:/volume1/data 3.0T 2.6T 368G 88% /data
To expand the /usr partition by 1GB, do:
[root@tempest ~] lvextend --size +1G --resizefs /dev/mapper/vg_tempest-lv_usr Extending logical volume lv_usr to 16.62 GiB Logical volume lv_usr successfully resized resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/mapper/vg_tempest-lv_usr is mounted on /usr; on-line resizing required old desc_blocks = 1, new_desc_blocks = 2 Performing an on-line resize of /dev/mapper/vg_tempest-lv_usr to 4358144 (4k) blocks. The filesystem on /dev/mapper/vg_tempest-lv_usr is now 4358144 blocks long.
We’d like to keep the /home partion not more than about 90% full, so this brings it back up to snuff:
[root@tempest ~] lvextend --size +37G --resizefs /dev/mapper/vg_tempest-lv_home Extending logical volume lv_home to 629.97 GiB Logical volume lv_home successfully resized resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/mapper/vg_tempest-lv_home is mounted on /home; on-line resizing required old desc_blocks = 38, new_desc_blocks = 40 Performing an on-line resize of /dev/mapper/vg_tempest-lv_home to 165142528 (4k) blocks. The filesystem on /dev/mapper/vg_tempest-lv_home is now 165142528 blocks long. [root@tempest ~] df -H Filesystem Size Used Avail Use% Mountpoint /dev/mapper/vg_tempest-lv_root 42G 825M 39G 3% / none 34G 697k 34G 1% /dev/shm /dev/sda1 508M 87M 396M 18% /boot /dev/mapper/vg_tempest-lv_home 666G 576G 57G 92% /home /dev/mapper/vg_tempest-lv_students 52G 46G 3.0G 94% /students /dev/mapper/vg_tempest-lv_usr 18G 15G 2.0G 89% /usr /dev/mapper/vg_tempest-lv_var 49G 24G 22G 53% /var /dev/mapper/vg_tempest-lv_tmp 11G 159M 9.7G 2% /tmp bigdata:/volume1/data 3.0T 2.6T 368G 88% /data [root@tempest ~]
