varsha Vsphere Tutorial & demo videos
cloudibee Mike Laverick has done a great job in sharing out the Vmware Vsphere video tutorials, that clearly explains number of vsphere concepts, howto and technologies in details. Worth watching! Watch…
Tuning Netapp snapmirror/snapvault speed
In Netapp, there is a option to set/limit bandwidth of all snapmirror and snapvault transfers. The option can be either system-wide or for a particular transfer. We can tune either…
Solaris LDOMs virtualization : setup guide
Sun Logical Domains or LDoms is a full virtual machine that runs an independent operating system instance and contains virtualized CPU, memory, storage, console, and cryptographic devices. This technology allows…
Netapp performance monitoring : sysstat : Part II
Here are some explanations on the columns of netapp sysstat command. Cache age : The age in minutes of the oldest read-only blocks in the buffer cache. Data in this…
Netapp Simulator – Installation steps
Those who are newly learning Netapp can use Netapp Data OnTap Simulator to get comfortable with Netapp commands. This tool gives you the experience of administering and using a NetApp…
Linux Enterprise Cryptographic Filesystem : ecryptfs
eCryptfs is a stacked cryptographic filesystem embedded within the Linux kernel. Being a stacked filesystem, it can easily encrypt and decrypt the files on your Linux server as they are…
Dynamically detecting new disks in Linux
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…