The Yellowdog Updater Modified (YUM) is an rpm package management opensource tool which is available for Redhat Linux and other Linux flavors.In earlier days, its very difficult to install packages in Linux systems since it will ask for many dependencies.After yum introduction,its become very simple and yum has algorithm to select all the dependencies automatically once you configured the yum repository.After reading this article you will get fair idea about installing yum packages,configuring yum […]
How to configure DHCP client on Redhat Linux ?
What is DHCP ?Dynamic Host Configuration Protocol (DHCP) is server/client protocol where DHCP server provides an IP address automatically with necessary information like subnet and gateway to DHCP clients. How to configure DHCP client on Redhat Linux /Cent OS ? What are the files need to be edited to enable DHCP client ? Here we are going to see how to setup DHCP client […]
KSAR – Graphical SAR analysis tool (Identify Solaris Bottlenecks )
The SAR is very useful tool to monitor CPU,memory,disk I/O,network resources all the time on Solaris server.But how do you analysis sar output ? Off-course you can use sar commands to see various system resource usage using sar output files.(Ex:Like sar -f file_name to see CPU usage,sar -r to see memory usage).But we are expecting more than this.In Solaris we do […]
Veritas cluster Interview Questions-2
Veritas cluster interview questions & answers part -2 will help you to overcome from L3 level VCS interview which will be asked frequently for SME position across many organizations. Here is the Top:30 VCS interview questions for you. Please go through questions and answers. Let me know if you have any doubt by leaving comment. Adding and removing […]
veritas volume manager installation step by step guide
This post describe about installation of VXVM on Solaris node and initialization issues with vxvm after the package installation. Unlike other packages installation,we have installer available in storage foundation bundle to minimize the complex.So no need to use pkgadd commands unless until there is an issue with the installer.Here is step by step guide for vxvm installation with putty output. Environment: Operating […]
How to Generate Crash Dump When the Solaris OS is Hung
This post explains about forcing a system crash dump when the system is in a hang condition and crashdump files are required for Oracle root cause analysis.In most cases, a system crash dump of a hung system can be forced. But this won;t work in all type of system hang conditions. In order to force crash dump,you need to […]
VXVM tutorial 11 – Linked Break-off snapshot
Linked break-off snapshot In this post we are going to see about Linked break-off snapshot. Unlike the full-sized instant snapshots, this volume can be set up in a different disk group from the data volume and possible to refresh the snapshot. High-level plan for backup using Linked break-off snapshot 1. Prepare the data volume for snapshot 2. Create […]
VXVM tutorial 10 – Third-mirror break-off snapshots
VXVM(VERITAS VOLUME MANAGER TRAINING) 10 OF 12 In this post, we are going to see traditional mirror break-off snapshot.To perform this snapshot ,we need free space equal to volume size on the diskgroup.It typically perform the volume mirror and it will make the new plex as snapshot volume for backup operations.High Level plan for backup of database volume using […]
VXVM Tutorial 9 – Space-optimized instant snapshot
VXVM(VERITAS VOLUME MANAGER TRAINING) 9 OF 10 In this post we are going to see Space-optimized instant snapshot.Unlike other snapshots,we no need equal volume space to generate this snapshot. Using the cache objects,we can create a instant snapshot.Depends on data changes on volume,cache objects size may varied.Ex:Volume size is increasing 100M/per hour,then you need minimum 100MB […]
VXVM Tutorial 8 – VXVM Instant Snapshots
VXVM(veritas volume manager training) 8 of 10 A snapshot is the state of a volume at a particular point in time. Veritas Volume Manager snapshot capability for taking an image of a volume at a given point in time.It provides various snapshot depends on the environments and product cost. There are three type of snapshot […]