Safe way to shrink lvm vg_*-lv_swap partition and reclaim freed space on Linux?
Hello,
Code:
[root@host2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 38.2G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 37.7G 0 part
├─vg_host2-lv_root (dm-0) 253:0 0 31G 0 lvm /
└─vg_host2-lv_swap (dm-1) 253:1 0 6.7G 0 lvm [SWAP]
ploop38874 182:621984 0 9.8G 0 disk
└─ploop38874p1 182:621985 0 9.8G 0 part /vz/root/1810
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My aim is to SAFELY shrink my swap partition (lvm vg_host2-lv_swap) so its size is 4GB and assign freed space to my root partition (lvm vg_host2-lv_root (dm-0)). I am on CentOS 6.10 64bit and i am wondering if i can do it on a running system without need to go into recovery - maybe i can go this way superuser.com/a/1024226/590209 (without reboot), maybe i can unmounting swap lvm on live system, but not lvresize (grow) root partition? How can i automatically grow root lvm partition during next boot (like editing boot parameters in grub)?
Last edited by centosadmin; 10-01-2019 at 06:53 AM..
Had a issue recently where DB admins did:
mv listener.log listener.log.old
gzip listener.log.old
Where file listener.log is continually being written to by an oracle process.
Anyway, according to the DB admins they successfully created the
listener.log.old.gz
file (i.e. all went okay).... (4 Replies)
Hi,
I have red hat enterprise 4. I would like to add more space on my lvm from the first partition that is not lvm type.
Here's the config
# fdisk -l
Disk /dev/sda: 73.4 GB, 73406611456 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes... (6 Replies)
I want to backup my partitions by shrinking it my issue is like
I want to create a new disk copy from only the used blocks I my current image.
How would I redirect the output of resize2fs to new disk and dd the current
partition so that I can boot my new image without issues and also without... (3 Replies)
Hi,
i have done a blunder here, i increased the swap space on Xen5.6 server machine using below steps :-
1056 dd if=/dev/zero of=/root/myswapfile bs=1M count=1024
1057 ls -l /root/myswapfile
1058 chmod 600 /root/myswapfile
1059 mkswap /root/myswapfile
1060 swapon /root/myswapfile
... (1 Reply)
Hi all,
Fedora 17, 64bit
Ubuntu 12.04 desktop 64bit
HD 160G
I installed Ubuntu 12.04 on the HD first taking up the whole disc. Later I added/installed Fedora 17 selecting the "Shrink" option and save the bootloader on /dev/sda1 to make them dualboot. Installation is successful with... (0 Replies)
My root file system is of type LVM. i wanna shrink it but unable to do so.
When i give the below command:
resize2fs /dev/mapper/VolGroup00-VolLog00 10000M
it messages that online shrink can't can't be done as the logical volume is mounted on /. i switched to single user mode by giving command:... (2 Replies)
Hi,
I need a suggesstion i have 2 disk if i installed OS / root partition by making Lvm in one disk and data in other disk also with the lvm, means 2 different lvms.
Is making LVM partition for OS disk will the performacne will be good?
Can i make 2 different lvm one is for OS and other for... (1 Reply)
Hello All,
I have a Red Hat Linux 5.9 Server installed with one hard disk & 2 Partitions created on it as follows,
/boot - Linux Partition & another is
LVM - One VG & under that 5-6 Logical volumes(var,opt,home etc).
Here my requirement is to take out 1GB of space from LVM ( Any logical... (5 Replies)
Hello everyone,
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
df -h
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
Discussion started by: DannyBoyCentOS
27 Replies
LEARN ABOUT DEBIAN
dtc_kill_vps_disk
dtc_kill_vps_disk(8) System Manager's Manual dtc_kill_vps_disk(8)NAME
dtc_kill_vps_disk - destroy LVM disks for freeing space
SYNOPSIS
dtc_kill_vps_disk VPS_NUMBER [ lvm|loopback ]
DESCRIPTION
dtc_kill_vps_disk This shell script is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server.
This script is used to delete a partitions that was used by a VPS. It will delete the normal partition that was used as a root disk, and
the swap partition.
dtc_kill_vps_disk is to be used by the dtc-xen SOAP server, but can also be used as a standalone userland tool.
OPTIONS
VPS_NUMBER has to be a number between 01 and 19. Let's say the number is 16, and that dtc-xen is configured to use the volume group called
lvm1, then this script will create /dev/lvm1/xen16 and /dev/lvm1/xen16swap.
IMAGE_TYPE This parameter can have 2 values: either lvm or loopback. If ommited, then lvm is used. If lvm is used, then this script will
create a partition using lvmcreate, otherwise it will create an image file. Both will later be used for the VPS.
EXAMPLE
dtc_setup_vps_disk 04 lvm
This will delete the 2 LVM partitions that were used by the VPS named xen04, the first one being the root partition, and the second one
being the swap partition.
VERSION
This documentation describes dtc_kill_vps_disk See http://www.gplhost.com/software-dtc-xen.html for updates.
SEE ALSO dtc_reinstall_os(8), dtc_setup_vps_disk(8)dtc_kill_vps_disk(8)
10-01-2019
