Safe way to shrink lvm vg_*-lv_swap partition and reclaim freed space on Linux?
Hello,
.
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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 SUSE
resize2fs
RESIZE2FS(8) System Manager's Manual RESIZE2FS(8)NAME
resize2fs - ext2/ext3/ext4 file system resizer
SYNOPSIS
resize2fs [ -fFpPM ] [ -d debug-flags ] [ -S RAID-stride ] device [ size ]
DESCRIPTION
The resize2fs program will resize ext2, ext3, or ext4 file systems. It can be used to enlarge or shrink an unmounted file system located
on device. If the filesystem is mounted, it can be used to expand the size of the mounted filesystem, assuming the kernel supports on-line
resizing. (As of this writing, the Linux 2.6 kernel supports on-line resize for filesystems mounted using ext3 only.).
The size parameter specifies the requested new size of the filesystem. If no units are specified, the units of the size parameter shall be
the filesystem blocksize of the filesystem. Optionally, the size parameter may be suffixed by one of the following the units designators:
's', 'K', 'M', or 'G', for 512 byte sectors, kilobytes, megabytes, or gigabytes, respectively. The size of the filesystem may never be
larger than the size of the partition. If size parameter is not specified, it will default to the size of the partition.
The resize2fs program does not manipulate the size of partitions. If you wish to enlarge a filesystem, you must make sure you can expand
the size of the underlying partition first. This can be done using fdisk(8) by deleting the partition and recreating it with a larger size
or using lvextend(8), if you're using the logical volume manager lvm(8). When recreating the partition, make sure you create it with the
same starting disk cylinder as before! Otherwise, the resize operation will certainly not work, and you may lose your entire filesystem.
After running fdisk(8), run resize2fs to resize the ext2 filesystem to use all of the space in the newly enlarged partition.
If you wish to shrink an ext2 partition, first use resize2fs to shrink the size of filesystem. Then you may use fdisk(8) to shrink the
size of the partition. When shrinking the size of the partition, make sure you do not make it smaller than the new size of the ext2
filesystem!
OPTIONS -d debug-flags
Turns on various resize2fs debugging features, if they have been compiled into the binary. debug-flags should be computed by adding
the numbers of the desired features from the following list:
2 - Debug block relocations
4 - Debug inode relocations
8 - Debug moving the inode table
-f Forces resize2fs to proceed with the filesystem resize operation, overriding some safety checks which resize2fs normally enforces.
-F Flush the filesystem device's buffer caches before beginning. Only really useful for doing resize2fs time trials.
-M Shrink the filesystem to the minimum size.
-p Prints out a percentage completion bars for each resize2fs operation, so that the user can keep track of what the program is doing.
-P Print the minimum size of the filesystem and exit.
-S RAID-stride
The resize2fs program will heuristically determine the RAID stride that was specified when the filesystem was created. This option
allows the user to explicitly specify a RAID stride setting to be used by resize2fs instead.
KNOWN BUGS
The minimum size of the filesystem as estimated by resize2fs may be incorrect, especially for filesystems with 1k and 2k blocksizes.
AUTHOR
resize2fs was written by Theodore Ts'o <tytso@mit.edu>.
COPYRIGHT
Resize2fs is Copyright 1998 by Theodore Ts'o and PowerQuest, Inc. All rights reserved. As of April, 2000 Resize2fs may be redistributed
under the terms of the GPL.
SEE ALSO fdisk(8), e2fsck(8), mke2fs(8), lvm(8), lvextend(8)E2fsprogs version 1.41.11 March 2010 RESIZE2FS(8)