Hi, there are tons of RAID1 tutorials, but none of them deal with lvm. The problem is that I want to expand my current lvm partition over RAID1 rather than creating a new lvm partition after RAID1 is created.
My master harddrive has lvm partition. I'm wondering how to create a RAID1 image of... (1 Reply)
Hi All,
How do I create /var as LVM type during install? I want my new OS to have /var as LVM so that I could extend it on the fly.
Thanks for any comment you may add. (2 Replies)
Hi,
I'm new to HP-UX.
I have LVM on /var with 92Gig. I would like to reduce it to create another LVM for Oracle client with 800 meg or so. How to do it. I'm running 11.iv3
Thanks (4 Replies)
Hi guys.
I'm confused how LVM snapshots work. Here is what i understood:
1. we have a Logical Volume holding our data.
2. we make a snap shot of it with this command:
lvcreate -L 1000M -s -n backup /dev/vg01/lv013. mount the snap shot
4. take your backup
5. remove the snapshot --> in this... (3 Replies)
I wanted to know how we can combine volumes over 2 physical drives.
# fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 ... (16 Replies)
Hello,
I have install 2 HDD in my server and now installing the Centos6.4.
I want create the LVM of those 2 HDD's so while i'm doing this it is not allowing me to select these 2 disk's from allowable disk list.
Same problem if i tried to make Software RAID with creating LVM.
Please help. (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)
Oracle Linux 6.6
To create Physical Volumes for Volume groups (LVM) , the disk need to be partitioned to LVM type ie. 'Linux LVM' type . In fdisk , this can done by choosing 8e when prompted for partition type.
Since it is easy to script (non-interactive), I use parted command rather than... (1 Reply)
I am running Ubuntu 16.04 on a HP laptop with a core I3 processor. I am trying to run mariaDB and do hot backups to disk. In order to do that I wanted to create an LVM snapshot and backup the snapshot for a point in time backup, possibly using tar. I included a snapshot of the gparted app showing... (1 Reply)
Discussion started by: gandolf989
1 Replies
LEARN ABOUT CENTOS
e4defrag
E4DEFRAG(8) System Manager's Manual E4DEFRAG(8)NAME
e4defrag - online defragmenter for ext4 filesystem
SYNOPSIS
e4defrag [ -c ] [ -v ] target ...
DESCRIPTION
e4defrag reduces fragmentation of extent based file. The file targeted by e4defrag is created on ext4 filesystem made with "-O extent"
option (see mke2fs(8)). The targeted file gets more contiguous blocks and improves the file access speed.
target is a regular file, a directory, or a device that is mounted as ext4 filesystem. If target is a directory, e4defrag reduces fragmen-
tation of all files in it. If target is a device, e4defrag gets the mount point of it and reduces fragmentation of all files in this mount
point.
OPTIONS -c Get a current fragmentation count and an ideal fragmentation count, and calculate fragmentation score based on them. By seeing this
score, we can determine whether we should execute e4defrag to target. When used with -v option, the current fragmentation count and
the ideal fragmentation count are printed for each file.
Also this option outputs the average data size in one extent. If you see it, you'll find the file has ideal extents or not. Note
that the maximum extent size is 131072KB in ext4 filesystem (if block size is 4KB).
If this option is specified, target is never defragmented.
-v Print error messages and the fragmentation count before and after defrag for each file.
NOTES
e4defrag does not support swap file, files in lost+found directory, and files allocated in indirect blocks. When target is a device or a
mount point, e4defrag doesn't defragment files in mount point of other device.
Non-privileged users can execute e4defrag to their own file, but the score is not printed if -c option is specified. Therefore, it is
desirable to be executed by root user.
AUTHOR
Written by Akira Fujita <a-fujita@rs.jp.nec.com> and Takashi Sato <t-sato@yk.jp.nec.com>.
SEE ALSO mke2fs(8), mount(8).
e4defrag version 2.0 May 2009 E4DEFRAG(8)