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[2] by VMware started to move into the server racks in the summer of 2011, but while I was researching this article, Citrix suddenly burst onto the scene with the XenServer 6.0 release [3 ... vSphere 5 vs. XenServer 6

of the million busiest sites on the web – compared with less than 17 percent for Microsoft's IIS and nearly 6 percent for the up and coming Nginx HTTP and reverse proxy server. Apache is a fairly mature project ... High performance and cloud suitability are the thrust of Apache 2.4. We give you the lowdown on transitioning your Apache HTTP Server from 2.2 to 2.4.

the biggest rentable cloud today: the Amazon Web Service. On the basis of this extremely mature technology, Citrix launched version 5.6 of its XenServer product family in May 2010. XenServer, the product built ... Version 5.6 of Citrix XenServer is a feature-stripped version of the virtualization product and is available free, in addition to the commercial Advanced, Enterprise, and Platinum editions.

-click the packet details in the packet list to add protocol fields. The release of Libpcap 1.0.0 added the ability to define the buffer size for recording and to view JPG files directly in Wireshark. Version 1.6 ... An administrator can only gain useful insights from network analysis if they understand the underlying procedures and protocols. The new version of Wireshark, 1.6, formerly known as Ethereal, can

single files across multiple storage nodes. Lustre [5] and Ceph [6] are popular examples of this technology. Before you can set up a cluster filesystem based on shared disks, you need to look out ... The vanilla kernel includes two cluster filesystems: OCFS2 has been around since 2.6.16 and is thus senior to GFS2. Although OCFS2 is non-trivial under the hood, it is fairly simple to deploy.

# stmfadm create-tg myfcserver 19 # stmfadm add-tg-member -g myfcserver wwn.10000000c93805a6 20 # stmfadm create-hg myfcclient 21 # stmfadm add-hg-member -g myfcclient wwn.50060b0000c26204 22 # svcadm enable

of options, including dual four-core Xeon, dual six-core Xeon, or quad 12-core AMD processors ranging in speed from 2.2 to 2.9GHz with 24 to 128GB of RAM per server and up to 1TB of scratch local storage per

and the average latency, that is, the time the disk takes to rotate through 180 degrees [6]. The data transfer rate is typically negligible for smaller I/O scales, as is the controller overhead. A Plethora

.0 2.2.x. 2.6.30 through 2.6.35 Debian 6 (Squeeze) 2.3.x. 2.6.36 through 3.0 Ubuntu 11.10 2.4.x. 3.1. openSUSE 12.1 2.5.x. 3

.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp