|
||||||
|
Add a new disk This assumes you have created an array on the SAN and allocated space to a logical volume on it; you have mapped a LUN pointing that logical volume to that host, and that the host is correctly zoned to see the SAN in the fibre channel fabric. Before anything, run multipath […] Contents Introduction Create Logical Volumes Delete Logical Volumes Introduction The following article presents an overview of the commands used to manage physical and logical volumes for use with Logical Volume Manager (LVM) in Linux. Before considering the various commands for LVM, lets first look at just what is meant by some of the terminology […] What is GFS? GFS allow all nodes to have direct CONCURRENT write access to the same shared BLOCK storage. For local file system e.g ext3, A shared BLOCK storage can be mounted in multiple nodes, but CONCURRENT write access is not allowed For NFS, the CONCURRENT write access is allowed, but it is not direct […] Disk Space issues mpstat -P ALL cat /proc/interrupts iostat -kd 1iostat -c -tiostat -c -t 2 10 iostat -c 3 iostat -d 5iostat -x 1 sar -b vmstat -S M 2 5 Find process causing high iowait netstat -autpn | grep :80netstat -autpn | grep :3306netstat -nanetstat -an|grep :80|sort|morenetstat -an|grep ESTABLISHEDnetstat -ntu | awk ‘{print […]
Here is an explanation of how to set up DRBD on CentOS6. # cat /etc/redhat-release CentOS release 6.2 (Final) # uname -ri 2.6.32-220.7.1.el6.i686 i386
# rpm -qa | grep drbd kmod-drbd84-8.4.1-1.el6.elrepo.i686 drbd84-utils-8.4.1-1.el6.elrepo.i686 Hostname ( uname –n ) of DBRD nodes are: centos6-drbd1.localdomain centos6-drbd2.localdomain
These nodes are running as VMs on a […] If I had to pick one fault of Linux, it would be that for almost everything, the Linux user is inundated with hundreds of possible solutions. This is both a blessing and a curse – for the veterans, it means that we can pick the tool that most matches how we prefer to operate; […] LVM in linux Logical Volume Management[LVM] LVM is a logical volume manager for the Linux kernel; it manages disk drives and similar mass-storage devices, in particular large ones. The term “volume” refers to a disk drive or partition. Every system contains Physical Volums[PV]. Such as hard disks, partitions or external storages. Volume management treats PVs […] Mount Points and /etc/fstab /etc/fstab is referenced each time the system boots. It consists fields like device name, mount point, file system type, fsck order like 0 = ignore, 1=fist, 2-9 = second, and third, etc. After the filesystem is created in /etc/fstab, it’s important to use the mount-a to mount the filesystem just created […] Recover Bad Superblock in Linux Filesystem If you get a ¨Damaged Superblock¨ error message at filesystem (fsck) check in Linux Server, Usually fsck will not be able to repair the file system due to bad super block. In these situations, we can recover the damaged super block from the backup. Solution: There are backups […] Open Files – Linux
ope it will be useful to you as well.. You might have this scenario; Logfiles deleted while the process is still running. That’s annoying: On your Linux-Server the /var filesystem is nearly full. You remove a very large logfile that you don’t need with the rm command: myserver1# df -Ph […] |
||||||
|
Copyright © 2024 - All Rights Reserved Powered by WordPress & Atahualpa |
||||||
Recent Comments