91d437f0fb56cfb5b64de81b60bd6738

Part of the following comes from: http://www.comparewebhosts.com/…htm

Rackspace’s cloud strategy is supported by three core offerings, all part of Mosso, Rackspace’s Cloud Hosting Division. The company’s existing Hosting Cloud and CloudFS storage offerings have been re-branded to reflect the company’s newly integrated approach:

· Cloud Sites — Rackspace’s flagship cloud offering, The Hosting Cloud, is now Cloud Sites. Developed by Mosso, Rackspace’s cloud division, it offers a scalable platform for handling huge traffic spikes and a pay-as-you-grow pricing model. Cloud Sites is a heterogeneous environment, supporting both Windows and Linux.

· Cloud Files — Rackspace’s internet-based storage service, CloudFS, is now Cloud Files. Cloud Files gives developers instant access to an enterprise-grade storage infrastructure and reduces overall investment and IT costs while providing infinite scalability. Cloud Files offers an industry leading SLA and a highly competitive pricing model with replicated storage starting at $0.15/GB. Also later this year, Limelight Networks will team with Rackspace to allow developers to easily distribute content to millions of end users around the world and bring scalable content delivery and application acceleration services to the masses. While continuing to support the Amazon S3 platform, Jungle Disk will port to Rackspace’s Cloud Files system in the coming months. Jungle Disk comes in both desktop and workgroup editions across the Windows, Mac and Linux platforms.

· Cloud Servers — This new hosting solution, which will deliver on-demand server capacity to businesses of all sizes, will leverage key technology developed by Slicehost, which uses Xen virtualization software. Slicehost will remain as the company’s developer brand, creating innovative new features driven through shared intellectual property in conjunction with development initiatives from Rackspace. As part of the announcement, Slicehost also announced new, larger slices for high performance computing, lower prices as well as IP sharing for high availability computing.

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To understand Mosso > http://www.mosso.com

Mosso architectures > http://www.mosso.com/cloud.jsp > look at “Benefit” @ bottom left.

The selling point to our customer >
Step One: Load it up
You can create a new Mosso-powered site – and even add some email accounts – in less than five minutes. Load-Balancing, clustering, and redundant storage are all inherited by your application automatically, without any effort.

Step Two: Watch it scale
From the first byte served, your site is hosted on advanced clustered technology designed for high- traffic, high- performance websites. When your site grows bigger than what it’s included, you pay inexperience scale pricing for exactly what you use and nothing more.

• Scale your bandwidth
• Starts at 500GB/mo. As much as you need for 25¢ per GB
• Scale your SAN storage
• Starts at 50GB/mo. As much as you need for 50¢ per GB
• Scale your compute
• Starts at 10,000 compute cycles/mo. As many as you need for 1¢ per compute cycle

Closer watch with screenshots > http://www.mosso.com/screenshots.jsp > this describes the ease of process when a client requests a host.

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http://www.slicehost.com is equal to Cloud Servers. This pretty much looks like VPS – virtual private server on Xen.

• Included in Every Slice™
• Full root access and rebooting
• Choice of Linux distro
• Dedicated IP address and Tier-1 redundant bandwidth
• RAID-10 disk storage
• Reserved RAM
• Guaranteed CPU share and more when available
• 4-core servers running Xen virtualization instances
• Slicehost management portal for reboots and software installs
• Mobile management portal for smartphones
• Ajax console access
• Bootable rescue mode
• Private IPs for inter-slice communication
• HA capabilities via shared IPs
• Machines running with fixed usage limits, below full capacity

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JungleDisk http://www.jungledisk.com/ uses Hadoop with friendly UI to provide backup/ redundancy. For security, all personal data is encrypted by personal key known only to you.

Source: http://www.pui.ch/phred/archives/2005/04/tags-database-schemas.html

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In this solution, the schema has got just one table, it is denormalized.
This type is called “MySQLicious solution” because MySQLicious imports del.icio.us data into a table with this structure.

Intersection (AND)

Query for “search+webservice+semweb”:
SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
AND tags LIKE "%webservice%"
AND tags LIKE "%semweb%"

Union (OR)

Query for “search|webservice|semweb”:

SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
OR tags LIKE "%webservice%"
OR tags LIKE "%semweb%"

Minus

Query for “search+webservice-semweb”
SELECT *
FROM `delicious`
WHERE tags LIKE "%search%"
AND tags LIKE "%webservice%"
AND tags NOT LIKE "%semweb%"

Source: http://www.gcn.com/print/27_14/46470-1.html#

Author: William Jackson

The Energy Department’s Energy Sciences Network is growing with increased bandwidth demands. The latest generation of the network, ESnet4, is a 100 gigabits/sec optical network; the department has projected that it would require 200 gigabits/sec by 2014.

The ESnet backbone is provided by Internet2 and Level 3 Communications, and its bandwidth is achieved by aggregating 10 gigabits/ sec optical channels. Increasing the size of the common interface can easily increase available bandwidth on existing fiber optic cable.

“Before they use up their capacity, we will be ready with the next generation technology,” said Randy Brogle, senior director of Level 3’s research and education division.

The next wave of interfaces will work at 40 gigabits/sec, and a number of commercial networks already are moving to that technology rather than bundling 10 gigabits/ sec channels.

“We’ve had a 40 gigabit capability since 2007,” said Paul Gainham, marketing director for Juniper Networks’ service provider division in Europe, Africa and the Middle East. “It’s a relatively new technology.”

In the United Kingdom, cable operator Virgin Media recently tested a 40 gigabits/ sec link between two major routing nodes on its Nortel optical network. “We provided a 40 gigabits/ sec interface at each end of the link.” Those interfaces are supported by Juniper T640 routers, the same routers used on Internet2, as well as the TX Matrix multiterabit routers.

In the United States, Verizon Business deployed 40 gigabits/sec router-to-router links last year, beginning with a Washington-to-Chicago Internet route and another route on the company’s Multiprotocol Label Switching network between Washington and New York City. Using a single 40 gigabits/sec channel rather than aggregated links provides better performance with less latency.

“For some, aggregating channels will continue to be a viable option,” Gainham said, but 40 gigabits/sec will become more attractive as the price for the technology comes down.

Not too far down the road, vendors expect to have 100 gigabits/sec interfaces, which will be able to provide 800 gigabits/sec in aggregated pipes. How long before 800 gigabits/sec is not enough? That’s difficult to say, said Rob Vietzke, executive director of network services for Internet2. “We’re interested in 40 [gigabits/ sec] and 100 [gigabits/sec] interfaces now.” Before that capacity reaches its limit, there will be a lot of work done with bandwidth management to expand the capacity of existing pipes.

Internet2 is a test bed network for new technologies and applications, and in many ways, it is growing in a different direction from the commercial Internet, said William Johnston, head of ESnet at DOE’s Lawrence Berkeley National Laboratory.

“I believe that research and education networks will always have different characteristics than commercial networks,” he said.