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Linux losing?
2007-10-31 06:07:00
A recent report from IDC says that Linux is losing out its share to Windows on x86 servers.According to reports, Linux growth has dropped from a 2003 high of +57% down to to -6% 2006. Over the same time period, Windows has continued to report positive annual growth. The reason for high growth of Linux was due to conversions from various Unix to Linux, and that the fast growth was due for a slowdown once largescale conversions were complete. Is linux slipping ?Read more at : http://www.eweek.com/article2/0,1895,2207 368,00.asp

Simple x86 Hypervisor - Lguest
2007-10-30 14:22:00
lguest - A simple and tiny virtualization solution for x86. URL : http://lguest.ozlabs.org/
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Ganeti - Virtual Server Management in Google Code
2007-10-30 14:11:00
http://code.google.com/p/ganeti/ &nb sp; - Ganeti is a virtual server management software tool built on top of Xen virtual machine monitor - found this in Google code.Ganeti features: support for Xen virtualization. supports cluster size 1-25 physical nodes. disk management using either plain LVM volumes, local-disk raid1 mirrors or across-the-network raid1 (using DRBD) for quick recovery in case of physical system failure. export/import mechanism for backup purposes or migration between cluster. 
More About: Management , Code , Server , Virtual

Difference between kvm and Xen
2007-10-30 13:49:00
Xen is an external hypervisor; it assumes control of the machine and divides resources among guests. On the other hand, kvm is part of Linux and uses the regular Linux scheduler and memory management. This means that kvm is much smaller and simpler to use. kvm only run on processors that supports x86 hvm (vt/svm instructions set) whereas Xen also allows running modified operating systems on non-hvm x86 processors using a technique called paravirtualisation. kvm does not support paravirtualization for cpu but may support paravirtualization for device drivers to improve I/O performances.Got from : http://kvm.qumranet.com/kvmwiki/FAQ
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dmidecode
2007-10-29 09:51:00
Dmidecode reports information about your system's hardware as described in your system BIOS. This command gives you vendor name, model name, serial number, BIOS version, asset tag as well as a lot of other details. This will include usage status for the CPU sockets, expansion slots (e.g. AGP, PCI, ISA) and memory module slots, and the list of I/O ports (e.g. serial, parallel, USB). A pretty useful command for sysadmins to prepare their system inventory. # which dmidecode/usr/sbin/dmidecode# dmidecode 2.2SMBIOS 2.3 present.87 structures occupying 3227 bytes.Table at 0x000FA920.Handle 0xDA00       ;  DMI type 218, 11 bytes.       ;  OEM-specific Type      & nbsp;          Header And Data:               ;      &nbs p;    DA 0B 00 DA D9 00 17 00 0E 2...

clockdiff
2007-10-29 09:46:00
Find clock different between two hosts in linux - using clockdiff[root@unixfoo1 root]# clockdiff  -o unixfoo2................................. .................host=unixfoo2 rtt=60(3)ms/54ms delta=22153ms/22153ms Mon Oct 29 01:42:13 2007[root@unixfoo1 root]# clockdiff -o unixfoo3................................. .................host=unixfoo3 rtt=298(7)ms/287ms delta=-21533793ms/-21533793ms Mon Oct 29 01:43:07 2007[root@unixfoo1 root]#
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Pictorial description of DAS NAS & SAN
2007-10-28 12:28:00
DAS NASSAN
More About: Pictorial , Description