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Archives for October 2014

Beginner’s Guide to LVM (Logical Volume Management)

by admin

What is LVM Logical volume manager (LVM) introduces an extra layer between the physical disks and the file system allowing file systems to be : – resized and moved easily and online without requiring a system-wide outage. – Using discontinuous space on disk – meaningful names to volumes, rather than the usual cryptic device names. […]

Filed Under: CentOS/RHEL 6, CentOS/RHEL 7, Linux Tagged With: beginners guides, centos, lvm, rhel

Beginners guide to Device Mapper (DM) multipathing

by admin

Multipathing Overview A path is a connection between a server and the underlying storage. The path can be severed due to many reasons like faulty HBA, faulty cable etc. To avoid such single point of failures, multipathing exists. Multipathing ensures that the system uses multiple physical paths to provide redundancy and increased throughput. There are […]

Filed Under: CentOS/RHEL 6, CentOS/RHEL 7, Linux Tagged With: device mapper multipathing, linux

CentOS / RedHat : Beginners guide to log file administration

by admin

The system log daemon is responsible for logging the system messages generated by applications or kernel. The system log daemon also supports the remote logging. The messages are differentiated by facility and priority. In principle, the logs handled by syslog are available in the /var/log/ directory on Linux system : # ls /var/log acpid cron.1 […]

Filed Under: Linux Tagged With: linux, log file administration, log rotate

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