varsha 
vinay Dynamically detecting new disks in Linux
cloudibee When you have new LUNs created on the SAN fabric, zoned & mapped it to the server; how can you detect the luns on the linux server online, without rebooting…
rpm package command tips
If you want to find which rpm contains a specific file in your linux system, you can use “rpm -qf” to get the package information. opensuse:~ # rpm -qf /etc/vmware-tools/tools.conf…
Fileop : Filesystem IO benchmarking tool
Iozone Linux filesystem benchmarking tool has another cool utility called “fileop”. This utility does file operation on the filesystem and gives the ops/sec for each operation. This tool will be…
Lustre – cluster filesystem : quick setup guide
The Lustre file system is a distributed high performance cluster filesytem that redefines I/O performance and scalability for large and complex computing environments. This is ideally suited for data-intensive applications…
HTTP Compression & Web Caching
After setting up my squid proxy for web caching, I was trying to see if it supports http compression. But the version which I had installed doesn’t support webcache compression.…
Netapp Snapmirror Setup Guide
Snapmirror is an licensed utility in Netapp to do data transfer across filers. Snapmirror works at Volume level or Qtree level. Snapmirror is mainly used for disaster recovery and replication.…
ZFS : Basic administration guide
ZFS is a combined file system and logical volume manager designed by Sun Microsystems. The features of ZFS include support for high storage capacities, integration of the concepts of filesystem…
Dstat : Linux Performance analysis tool
Dstat is a handy utility for monitoring systems during performance tuning tests, benchmarks or troubleshooting. It combines vmstat, iostat, ifstat, netstat information and more. Dstat overcomes some of their limitations…
Pictorial description of DAS NAS & SAN
DAS: Direct-attached storage, or DAS, is the most basic level of storage which most people are familiar with, in which storage devices are part of the host computer, as with…
Xen : Bridging on bonded & trunked interfaces
When you deploy some critical stuffs like Oracle DB, Oracle RAC DB etc on the Xen or Oracle virtual machine, you’ll have to use bonded network interfaces and the vlan…
Netapp Snapvault guide
Netapp SnapVault is a heterogeneous disk-to-disk backup solution for Netapp filers and heterogeneous OS systems (Windows, Linux , Solaris, HPUX and AIX). Basically, Snapvault uses netapp snapshot technology to take…
Vmware – Netapp cloning : Rapid VM provisioning
Checkout this demo of provisioning 5000 Vmware VMs using Netapp File cloning and volume flexclone technologies. Good one ..
Configuring Persistent static route in Linux
Static routes will be added usually through “route add” command. The drawback of ‘route’ command is that, when Linux reboots it will forget static routes. But to make it persistent…
Xen : Adding and removing NICs on virtual machines
Virtual Network interfaces can be attached or detached from a guest virtual machine (domU) while the virtual machine is up and running. The below Xen networking steps gives details on…
GSmartControl : GUI for smartctl
GSmartControl is a graphical user interface for Linux smartctl, which is a tool for querying and controlling S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) data on modern hard disk drives. You…