That does indeed show a "fragment size" of 8 KB, which is the "fundamental file system block size", i.e. the minimum block size that can be used on a file system..
Quote:
[CODE]
[..]
I think it's somehow related that root VG supposed to be on a contiguous LVM logical volume. But I'm not sure.
It is important to get the terms right. A VG can not be on a LVM volume. What you mean is the root filesystem (in this case of type VXFS) that gets mounted on /. The root filesystem is usually on one of the logical volumes (typically lvol3) on vg00.
If there needs to be a contiguous LVM, then that typically pertains to the swap volume ( typically lvol2 on vg00), but that does not contain a VXFS file system and so does not have a block size / fragment size..). The contiguousness has to do with physical extents, not filesystem blocks / fragments..
Last edited by Scrutinizer; 12-26-2014 at 03:17 AM..
Hello Unix guru's
I want to check my OS Block size for the Solaris 8
Following is one of the line from df -g command.
Can anybody help to interpret the same.
/u03 (/dev/vx/dsk/oradg/vol03): 8192 block size 8192 frag size
205463552 total blocks 50433792... (1 Reply)
hi all,
in my server there are some specific application files which are spread through out the server... these are spread in folders..sub-folders..chid folders...
please help me, how can i find the total size of these specific files in the server... (3 Replies)
Hi,
We currently have an Oracle database running and it is creating lots of processes in the /proc directory that are 1000M in size. The size of the /proc directory is now reading 26T. How can this be if the root file system is only 13GB?
I have seen this before we an Oracle temp file... (6 Replies)
#!/bin/sh
##########################################################################################################
#This script is being used for AOK application for cleaning up the .out files and zip it under logs directory.
# IBM
# Created
#For pdocap201/pdoca202 .out files for AOK
#1.... (0 Replies)
Hi Experts,
I have a script like
$ORACLE_HOME/bin/sqlplus username/password # << ENDSQL
set pagesize 0 trim on feedback off verify off echo off newp none timing off
set serveroutput on
set heading off
spool Schemaerrtmp.txt
select ' TIMESTAMP COMPUTER NAME ... (5 Replies)
Hello,
in one default UFS filesystem we have 8K block size (bsize) and 1K fragmentsize (fsize). At this scenary I thought all "FileSytem IO" will be 8K (or greater) but never smaller than the fragment size (1K). If a UFS fragment/blocksize is allwasy several ADJACENTS sectors on disk (in a ... (4 Replies)
I have been searching both on Unix.com and Google and have not been able to find the answer to my question. I think it is partly because I can't come up with the right search terms.
Recently, my virtual server switched storage devices and I think the problem may be related to that change.... (2 Replies)
Discussion started by: jmgibby
2 Replies
LEARN ABOUT CENTOS
lvreduce
LVREDUCE(8) System Manager's Manual LVREDUCE(8)NAME
lvreduce - reduce the size of a logical volume
SYNOPSIS
lvreduce [-A|--autobackup {y|n}] [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--version] [-f|--force] [--noudevsync] {-l|--extents
[-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}] | [-L|--size [-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]} [-n|--nofsck] [-r|--resizefs] Logi-
calVolume{Name|Path}
DESCRIPTION
lvreduce allows you to reduce the size of a logical volume. Be careful when reducing a logical volume's size, because data in the reduced
part is lost!!!
You should therefore ensure that any filesystem on the volume is resized before running lvreduce so that the extents that are to be removed
are not in use.
Shrinking snapshot logical volumes (see lvcreate(8) for information to create snapshots) is supported as well. But to change the number of
copies in a mirrored logical volume use lvconvert(8).
Sizes will be rounded if necessary - for example, the volume size must be an exact number of extents and the size of a striped segment must
be a multiple of the number of stripes.
OPTIONS
See lvm(8) for common options.
-f, --force
Force size reduction without prompting even when it may cause data loss.
-l, --extents [-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]
Reduce or set the logical volume size in units of logical extents. With the - sign the value will be subtracted from the logical
volume's actual size and without it the value will be taken as an absolute size. The total number of physical extents freed will be
greater than this logical value if, for example, the volume is mirrored. The number can also be expressed as a percentage of the
total space in the Volume Group with the suffix %VG, relative to the existing size of the Logical Volume with the suffix %LV, as a
percentage of the remaining free space in the Volume Group with the suffix %FREE, or (for a snapshot) as a percentage of the total
space in the Origin Logical Volume with the suffix %ORIGIN. The resulting value for the subtraction is rounded downward, for the
absolute size it is rounded upward. N.B. In a future release, when expressed as a percentage with VG or FREE, the number will be
treated as an approximate total number of physical extents to be freed (including extents used by any mirrors, for example). The
code may currently release more space than you might otherwise expect.
-L, --size [-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
Reduce or set the logical volume size in units of megabytes. A size suffix of k for kilobyte, m for megabyte, g for gigabytes, t
for terabytes, p for petabytes or e for exabytes is optional. With the - sign the value will be subtracted from the logical vol-
ume's actual size and without it it will be taken as an absolute size.
-n, --nofsck
Do not perform fsck before resizing filesystem when filesystem requires it. You may need to use --force to proceed with this option.
--noudevsync
Disable udev synchronisation. The process will not wait for notification from udev. It will continue irrespective of any possible
udev processing in the background. You should only use this if udev is not running or has rules that ignore the devices LVM2 cre-
ates.
-r, --resizefs
Resize underlying filesystem together with the logical volume using fsadm(8).
Examples
Reduce the size of logical volume lvol1 in volume group vg00 by 3 logical extents:
lvreduce -l -3 vg00/lvol1
SEE ALSO fsadm(8), lvchange(8), lvconvert(8), lvcreate(8), lvextend(8), lvm(8), lvresize(8), vgreduce(8)Sistina Software UK LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26) LVREDUCE(8)