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For those of you who have ever paid full price for a Threadless tee, my heart goes out. The sale kicked off last nite, and as usual things are basically $5 off, with the regular $10 tee being the value leader. You have till Monday midday to pick up your wears.
USA Soccer T-Shirt
The 19th ever FIFA World Cup is starting in less than one day, and if you're a supporter of Team USA you've got several reasons to be optimistic, it is time for you to get the best rv accessories and go camping. First of which is the squad's performance in last summer's Confederation Cup, but not to be overlooked is this year's favorable draw. In 2006 USA was drawn into perhaps the tournament's toughest group, along with Ghana, Czech Republic, and eventual champions Italy, but in 2010 the grouping is much kinder with the inclusion of Algeria and Slovenia alongside powerhouse England. If you are planning on travel don't forget you can get the best RV, learn more here. If things go to plan we could see a June 27th clash between United States and Germany in Bloomfontein during the knock-out stage. If you are actually planning on camping there, check this best waterproof tent review.
If you are thinking about picking up the official USA replica jersey, consider acting quickly as the away jersey is already completely sold out online.
World Cup 2010 T-Shirts
The 2010 World Cup is less than two days away, and if you don't know who Sulley Muntari is, you had better be familiar with Lionel Messi, easily one of the top 5 players in the tournament, you want to see the new t-shirt from Messi? See it here. Alternate Kits offers a non-traditional take on the supporter's t-shirt, freely utilizing puns and making ample use of hyperbole, all at a much lower price than the typical soccer jersey.
UPDATE: Unfortunately, Alternatekits.com is now defunct.
When Hearts and Minds Collide
It doesn't seem like I have quite enough patience to spend any appreciable amount of time at xkcd. Patience is, therefore, a virtue.
Threadless Holds Yet Another $10 Sale, World Holds Collective Breath
Entschuldigung! Our favorite Threadless is holding yet another sale that is supposed to last until tomorrow morning. Boys and girls, this only happens 4-5 times a year, so take notice! Or better yet, submit order.
Stop Motion Video Utilizing T-Shirts
Saw this on Woothemes Demo Server, which is a totally random place to find content. In case you don't know, Woothemes is a pretty cool place to find cheap WordPress themes, which you can use as a basic layout for any website, not just a blog. (Check out one of their themes in action at Spain Soccer Jersey, one of my other sites.)
Anyway, the video is reminiscent of Justice's D.A.N.C.E video, so if you are into that sort of thing definitely give it a play. If you're really into t-shirt videos, also check out my post on the Guiness world record for most t-shirts worn at the same time.
Product Barcode Art
Need a little artistic inspiration in your life? A couple of Japanese companies are integrating design elements into otherwise ominous looking retail barcodes. [via Woothemes and Infosthetics]
Haiti Benefit T-Shirt Roundup
An earthquake struck Haiti one month ago. I just ordered this t-shirt from Threadless. Here are a few other t-shirts you can buy with proceeding going to the people of Haiti.
- A Galery of shirts over at Cafepress.
- Eske ou ka ede non, souple? at Etsy.
- Steel Train at HelloMerch.
- Be a Hero by Bungie Games – might work for those of us who like to play Halo.
- Haiti United at Soccer.com.
- Yéle Hands by Wyclef Jean.
Know any other t-shrits where 100% of the proceeds are donated to earthquake victims? Post them in the comments please.
Design By Humans
It's about time I gave a mention to DesignByHumans. They've grown tremendously since I first started blogging about dogs and the best cbd dog treats, and they are having a post-Christmas clearance. Don't expect anything earth-shattering in terms of savings, or any monkey business for that matter.
Read information about electronic and digital signature here in our website, click link below:
Back Up
Unbeknown to me, the site was down for two weeks, until I finally figured out there was a problem yesterday. Thanks to a helpful stranger I was able to sort it out.
Now, on to more important things: the FSDAH tee is available from Print Liberation, one of the best t-shirt shops I've never blogged about.


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Group Discussions
Do you use coupons?Subscribe
I have to confess, our family has never really used coupons. I do look for discount codes when shopping online but I am thinking we need to get a bit more disciplined about using coupons in this economy.
What are your favorite coupon sites or strategies? Do you actually clip coupons or just use online ones?Flag as inappropriate Posted by Nataly on 29th November 2008
Using coupons and planning meals has really saved alot of money on our grocery bills!!! I am in the process of creating a website with money saving ideas and websites. Here's my link if you'd like to check it out! http://www.mybargainmom.weebly.comFlag as inappropriate Posted by lenamv24 on 8th December 2008
I use them when I can - just plain clipped ones. My grocery store won't accept coupons printed from websites. I'm guessing they had too many people altering them prior to using them.
As for on-line shopping, I ALWAYS look for free shipping codes and any discount codes I can find.
My boys' school sold Kidstuff coupon books so, we got one. I keep it in the car so that whenever we are out shopping, I can pull the coupons that might help out. With one purchase at Ann Taylor, I more than paid for the book when I used their discount coupon!Flag as inappropriate Posted by patsyk on 15th December 2008
You'd be surprised how much you can save with coupons, especially when they double them (some markets don't). I get JUST the Sunday newspaper (costs about $1.50 a week) and clip the coupons that come in it. I save close to $60 a week now with them!!!
One bad thing I've noticed is sometimes I'll clip a coupon just because it's a new product and buy it because I can get a discount, and then never use it, so you have to be careful with that and only clip coupons for stuff you know you're going to use.Flag as inappropriate Posted by Tricia on 15th January 2009
Yes, most definitely now. In years past, we haven't been real good at using them. Husband always was funny about it. I know there were many times I sent him to the store with coupons and he "forgot" to use them. Now he even helps sort through them, and manages them while at the store. I think he has finally seen the value in coupons.
I do have to be careful to not use too many. I have had one child leave the house and another this year. Reducing the family size, means less food.Flag as inappropriate Posted by kim on 27th January 2009
I find that so many coupons are for name brand products, often the store brand is cheaper. I only use them for products that are not generic that I use and like. Does anyone have any tips for me to get better results?Flag as inappropriate Posted by sun8shine on 30th January 2009
i use coupons all the time i also call companies and ask for coupons luvs diapers just sent me 2 $10 off diapers and for me thats an extra 20 i dont have to spend on something my son needs. i also calculate the price per ounce of food to buy the better product it may cost more but have more in itFlag as inappropriate Posted by sc00by1445 on 30th January 2009
I don't use coupons as often as I would like, but when I do, I see a difference. However, I do shop at the buy-one-get one free sales. You have to be very careful though that the prices aren't reflecting what you would have paid for two anyway!! Certain stores like Publix will actually split the price in half if only one item is purchased. I haven't run across any other stores that do that. Also, buy in bulk so that your trips to the store are less frequent. I find that if I spend the amount that I normally spend per month on bulky items, I have cut spending in half. If your family eats meats often, try going to a market where the meats are actually prepared in the store--early in the morning, the meats are often marked down.Flag as inappropriate Posted by Alicia on 30th January 2009
I clip coupons but I don't think I save that much on it. I tried a couple of those web sites where they're supposed to find all these deals for you, but unfortunately, most coupons and things featured on those sites are for highly processed junk food that we don't eat. I do save a lot of money, I think, by planning. I go to my store's web site (Publix) and check out all the deals and then I plan the week's menu from that plus what's good at the farmers' market. If the store has a good deal on, say, chicken breasts, I stock up and freeze. We love the two-for-one deals. I make kind of of a game of staying under budget and seeing how high I can get my savings on the receipt.
I used to just hand write a weekly menu, but I found the cutest menu planner in one of my son's school's fundraisers at sallyfoster.com. I post that on the fridge and not only are we saving money, but when I get home every night we avoid that whole "I don't know, what do you want" discussion.Flag as inappropriate Posted by lauriews on 30th January 2009
Here is a helpful hint to all of you that clip coupons from the sunday paper. Instead of buying sunday paper at local gas/grocery store. I buy mine at the Dollar Tree Store only a dollar. 52 weeks in a year your saving 26.00-52.00 dollars a year. Last week I bought a 1.00 paper and clipped 15.00 dollars worth of coupons and that is stuff that we actually use and not brand new products and such.Flag as inappropriate Posted by Time for mom on 30th January 2009

subset: commoncrawl


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|....Optics Highlights
I. Ancient History
|The history of optics and optical devices begins in ancient Greece; the comic writer Aristophanes described the reflection of the suns rays. Democritus and Aristotle speculated about the nature of vision. The story of Archimedes focusing the suns rays to win a battle for Syracuse in 213 BC is only a legend, reported centuries later, but in the Roman Empire, the philosopher, statesman and tragedian, Seneca noted the magnification of objects seen through water-filled transparent vessels, and his friend, the Emperor Nero may have been the first to use a monocle, employing an emerald lens to view events in the coliseum. The Alexandrian astronomer and mathematician, Ptolemy measured the refractive effects of water and discussed the refractive effects of the atmosphere. At the beginning of the second millennium, the remarkable Persian, Alhazan, solved problems of reflection and refraction and was the first to explain that vision was the result of light coming from an object into the eye..
|Aristophanes (450? - 388? BC) the Rabelaisan writer of early Greek comedy, lived during the turbulent period of the Peloponnesian War. His comedies are filled with course, outspoken abuse and satire of prominent individuals. In Clouds, an attack on the educational theories of the radical intellectual Sophists, a character reflects the suns rays to secretly melt an I.O.U. (written on a wax tablet). Aristophanes plays are still being produced after 2,500 years, the most popular being Lysistrata, a comedy in which the women of Greece unite in a sex-strike to force their husbands to agree to peace.
|Democritus (460 - 370 BC) is known only by the surviving fragments of his works; he is said to have been a wealthy citizen of Thrace (modern Bulgaria, for the most part). His place in the history of Physics rests upon his conceptions of the Void and of eternal, indivisible, infinitesimal atoms. He made the first attempt to explain perception and color; his theory was that sensation was caused by the size and shape of atoms, and that color was due to such properties as the roughness of the constituent atoms.
|Aristotle (384 -322 BC) was a son of the Macedonian court physician. He was sent to Athens to study, later founded a school of philosophy there, and for a while was tutor to Alexander the Great. When his works were translated into Latin during the 12th and 13th centuries, they exerted a profound influence on European thought. Aristotle was concerned by questions of perception, and rejected the Euclidian theory that vision was solely due to rays emanating from the eyes and "touching" the object.
|Archimedes (290? - 212? BC), the outstanding mathematician and inventor of the ancient world, was born and spent most of his life in Syracuse, the great city/state of Sicily. He was on close terms with the king, and participated actively in the defense of the city against the Romans, inventing and building war machines. He was killed when the city was finally taken and sacked. Archimedes was very much involved in catoptrics (reflections from surfaces) and in refraction, but his writings in this field are lost, and his mathematics papers were not translated into Latin until the 16th and 17th centuries when their appearance had a significant effect upon the development of mathematics.
|Lucius Annaeus Seneca (4 BC - 65 AD) managed to survive 69 years in the midst of the intrigue and murder at the center of Roman imperial power. Nearly killed by Caligula, exiled for adultery by Claudius, tutor and favorite of Nero, he was finally ordered to commit suicide after being implicated in a plot against his former student. His writings include a number of philosophical works (he was a Stoic) and a series of revenge tragedies. His place here is due to the fact that he noted and wrote about the magnifying effects of liquids in transparent vessels.
|Nero (Nero Claudius Caesar Augustus Germanicus) (37 - 68) became Emporer of Rome at the age of 17 as the result of successful series of poisonings by his mother, Agrippina. His subsequent megalomaniac artistic pretensions, extravagances and misrule led to his eventual overthrow, death, and traditional infamous reputation. His place in a history of optics is due to the circumstance that he used an emerald (the first monocle) while watching combats in the arena.
|Ptolemy (Claudius Ptolemaeus) (85 - 165) propounded the geocentric system which prevailed for the next 1400 years. Nothing is known about his life and he has no biography. Only one of the five volumes he wrote on optics has survived. He dealt with refraction and obtained the small angle approximation to Snells law, concluding that the ratio of the angles of incident and refracted light were constant.. He also discussed the refraction of starlight by the atmosphere but held to the theory that vision is due to rays emitted from the eye touching the object .
|Alhazan (Abu Ali Hasan Ibn al-Haitham) (965 - 1040) was one of the most famous of the Arab scholars and those of his 200 works which were translated had great influence when they became available in medieval Europe. He was born in Basra, traveled widely, and lived in Egypt. It is said that when he could not satisfy the Caliphs request that he find a way to control the Nile floods he feigned madness until the Caliph died. His work in optics included research on reflections from spherical and parabolic mirrors. He disproved Ptolemys law of refraction and disagreed with his theory of vision. He also discussed atmospheric refraction, explained the increase in apparent size of the sun and moon near the horizon, and attempted to measure the height of the atmosphere.
|...Back to first page
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The creation of a new musical work from pieces of some existing work or works. The remix usually contains some recognizable element of the original piece, though some more extreme remixes alter the original material beyond recognition.
(Source – Cox, C. and Warner, D. (2004) Audio Culture : Readings in Modern Music. Continuum.)


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A Randomized Placebo-Controlled Trial of Omega-3 and Sertraline in Depressed Patients With or at Risk for Coronary Heart Disease
Robert M. Carney, PhD; Kenneth E. Freedland, PhD; Eugene H. Rubin, MD, PhD; Michael W. Rich, MD; Brian C. Steinmeyer, MS; and William S. Harris, PhD
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Besides our new and used Toyota cars, we provide quality car repairs and service. Come on in to our El Monte Toyota new and used car dealership today! We'll get you the pre-owned vehicle that you have been searching for.
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Virtualizing NAS
Companies of all sizes are being inundated with unstructured data that's straining the limits of traditional file storage. File virtualization can pool those strained resources and provide for future growth.
Companies of all sizes are being inundated with unstructured data that's straining the limits of traditional file storage. File virtualization can pool those strained resources and provide for future growth.
Unstructured data is growing at an unprecedented rate in all industries and has become one of the top challenges for IT departments. Market data from a variety of analyst and research firms shows a congruent picture: In most companies, the amount of unstructured data (file based) outstrips structured data; it's spread across the enterprise; and it tends to reside on a motley assortment of isolated file stores that range from file servers to network-attached storage (NAS). Management pain points have reached a critical level and associated costs are skyrocketing.
How we ended up in this dilemma is well understood. On the one hand, we have the simplicity of implementing unstructured data stores via Windows and Linux file servers with directly attached and storage-area network (SAN) storage; on the other hand, we have traditional NAS systems that are based on scale-up architectures with inherent limitations to scale. For instance, until NetApp released Ontap 8 it lacked advanced clustering and a global namespace; the only way to extend beyond a single NetApp filer was to buy a larger filer or deploy another one running independently from already installed systems.
The data storage industry is keenly aware of the situation, and vendors have taken different approaches to provide file system and NAS virtualization products that help to overcome the challenge at hand. Even though progress has been made, adoption has been tepid. "It has taken almost 10 years for block-based virtualization to take place," said Greg Schulz, founder and senior analyst at Stillwater, Minn.-based StorageIO Group. "NAS virtualization is still in an early stage and it will take time for it to be widely adopted."
Four ways to virtualize file access
Virtualizing file access by putting a logical layer between back-end file stores and clients, and providing a global namespace is clearly the most promising approach to tackling the unstructured data challenge. It's akin to block-based storage virtualization, however, there isn't a single method of implementing file-access virtualization. Instead, we have several architectural approaches competing for a potentially lucrative file-access virtualization market.
1. File-system virtualization (aggregation) is one way of virtualizing file access. At a high level, file-system virtualization accumulates individual file systems into a pool that's accessed by clients as a single unit. In other words, clients see a single large namespace without being aware of the underlying file stores. The underlying file store could be a single NAS, or a mesh of various file servers and NAS systems. File-system virtualization products address two main problems: They give users a single virtual file store; and they offer storage management capabilities such as nondisruptive data migration and file-path persistency while files are moved between different physical file stores.
One of the great benefits of file-system virtualization is that it can be deployed in existing environments without having to rip out existing servers and NAS storage. On the downside, file-system aggregation doesn't address the problem of having to manage each file store individually.
2. Clustered file systems are another way of virtualizing file access. Clustered file systems are part of next-generation NAS systems designed to overcome the limitations of traditional scale-up NAS. They're usually composed of block-based storage nodes, typically starting with three nodes and scaling to petabytes of file storage by simply adding additional nodes. The clustered file system glues the nodes together by presenting a single file system with a single global namespace to clients. Among the vendors offering NAS systems based on clustered file systems are FalconStor Software Inc.'s HyperFS, Hewlett-Packard (HP) Co.'s StorageWorks X9000 Network Storage Systems, IBM's Scale Out Network Attached Storage (SONAS), Isilon Systems Inc., Oracle Corp.'s Sun Storage 7000 Unified Series, Panasas Inc., Quantum Corp.'s StorNext and Symantec Corp.'s FileStore.
3. Clustered NAS is a third way of virtualizing file access. Clustered NAS architectures share many of the benefits of clustered file-system-based NAS. Instead of running a single file system that spreads across all nodes, clustered NAS systems run complete file systems on each node, aggregating them under a single root and presenting them as a single global namespace to connected clients. In a sense, clustered NAS is a combination of a scale-out, multi-node storage architecture and file-system aggregation. Instead of aggregating file systems of heterogeneous file stores, they aggregate file systems on native storage nodes. The BlueArc Corp. Titan and Mercury series of scale-out NAS systems are prime examples of clustered NAS systems.
4. NAS gateways can also be viewed as file-system virtualization devices. Sitting in front of block-based storage, they provide NFS and CIFS access to the block-based storage they front end. Offered by most NAS vendors, they usually allow bringing third-party, block-based storage into the NAS and, if supported by the NAS vendor, into the global namespace.
NAS systems and gateways based on clustered file system or clustered NAS architectures are next-generation NAS systems and won't integrate with existing legacy file stores; they usually replace them or run in parallel with them. This makes them more difficult to deploy as well as more expensive than file-system virtualization products. However, the benefit of having to manage a single NAS, rather than many small data silos that are simply aggregated by a file-system virtualization product into a single namespace, more often than not justifies the additional effort and cost.
|NAS virtualization terminology
Namespace is the organization and presentation of file-system data, such as directory structure and files.
In a non-shared namespace, file-system information is confined to a single physical machine and not shared with others. Traditional scale-up NAS and server-based file stores are examples of products with non-shared namespaces.
Conversely, a shared namespace, also referred to as a global namespace, combines the namespace of multiple physical machines or nodes into a single namespace. It can be implemented by aggregating the namespaces of multiple machines and presenting them as a single federated namespace, as is usually the case in file-system virtualization and clustered NAS products, or it can be achieved via clustered file systems where a single file system spreads across multiple physical nodes.
Scale-up NAS is a file-based storage system that scales by replacing hardware with faster components, such as faster CPUs, more memory and more disks. Its namespace spans one or two nodes clustered for high availability.
Scale-out NAS is a file-based storage system that provides scaling by adding nodes to the cluster. Available in N+1 (single redundant node) or N+M (each node has a redundant node) high-availability configurations, they provide a namespace that spans multiple nodes, allowing access to data throughout all nodes in the namespace.
File-system virtualization use cases and selection criteria
Because ripping out existing file stores and replacing them with a scale-out NAS isn't an option in many situations, file-system virtualization products that aggregate the various file stores into a single global namespace can be viewed as complementary to scale-out and traditional NAS systems, especially during the extended time of transitioning from legacy file stores. "Many customers buy a NAS to get features like replication, archiving and snapshots, but they don't require these for all files," said Brian Gladstein, vice president (VP) of marketing at AutoVirt Inc. "We give them the ability to mix existing low-end file stores with fast filers and provide them with a single namespace."
Even in companies that can centralize their unstructured data onto a NAS with global namespace support, there will likely always be some storage silos that live outside the NAS. It could be departmental data or data that's deemed unworthy to reside on comparatively expensive NAS storage. File-system virtualization products allow combining rogue file stores with NAS devices into a global namespace. A second use case for file-system aggregation is data migration. Acquisitions, storage infrastructure upgrades and data relocation projects are among the reasons for migrating data from one physical location to another. Because file-system aggregation products virtualize access to heterogeneous file stores, they're also simple yet effective data migration solutions. Another use case for file-system aggregation is automated storage tiering. Equipped with policy engines for defining data migration rules based on file-system metadata -- such as last access date, file size and file type -- they enable automatic data movement to suitable storage tiers based on defined policies.
File-system virtualization products are available as appliances and software-only products. A software-only product offers the benefits of more flexible deployment on hardware of your choice, and the products usually have a lower degree of vendor lock-in. Conversely, appliance-based file-system virtualization products come in a proven, performance-optimized package and, because hardware and software are provided by the same vendor, there's less risk of finger pointing.
When comparing file-system virtualization products, the level at which virtualization occurs is a relevant evaluation criteria. For instance, while Microsoft Distributed File System (DFS) provides share-level virtualization, a product like F5 Networks Inc.'s ARX series provides file-level virtualization.
Intrusiveness and ease of deployment are also relevant characteristics to consider during a product evaluation. Ideally, a file-system virtualization product should require minimal client changes and the virtualized data on the back-end file stores shouldn't be changed.
File-system support must also be considered. While some systems support only CIFS, products like F5's ARX and EMC Corp.'s Rainfinity support CIFS and NFS, which is relevant in environments with both Windows and Linux file stores. The presence of a policy engine and its capabilities are critical if the product's intended use is for data mobility and automated storage tiering.
File-system virtualization product sampler
File-system virtualization products are offered by a number of vendors, each coming from a different background with varying objectives.
AutoVirt File Virtualization software: Like Microsoft DFS, AutoVirt is a software-only product that runs on Windows servers.
The AutoVirt global namespace uses the CIFS protocol to interact with file servers, clients and DNS. When a client requests a file, DNS facilitates resolution to the appropriate storage device. The global namespace acts as an intermediary between client and DNS. With the AutoVirt global namespace in place, client shortcuts refer to the namespace. The namespace is the authority on the location of networked files and provides the final storage referral with the help of DNS.
AutoVirt can be introduced nondisruptively to clients, without the need to make any changes on clients, by populating the AutoVirt namespace server with the shares of existing file stores. Although it can be done manually, a data discovery service automates discovery of existing file stores and populates the AutoVirt namespace server with metadata. This differs from Microsoft DFS, which requires clients to be configured with the new DFS shares, rather than continuing to use existing file shares.
Also contrary to Microsoft DFS, AutoVirt provides a policy engine that enables rule-based data mobility across the environment to migrate, consolidate, replicate and tier data without affecting end-user access to networked files. Currently available for CIFS, AutoVirt plans to release a version for NFS by year's end.
EMC Rainfinity file virtualization appliance: Rainfinity is a family of file-system virtualization products that virtualize access to unstructured data, and provide data mobility and file tiering services. The Rainfinity Global Namespace Appliance provides a single mount point for clients and applications; the Rainfinity File Management Appliance delivers policy-based management to automate relocation of files to different storage tiers; and the Rainfinity File Virtualization Appliance provides nondisruptive data movement.
Contrary to F5's ARX, the Rainfinity File Virtualization Appliance architecture is designed to switch between in-band and out-of-band operations as needed. The appliance is out-of-band most of the time, and data flows between client systems and back-end file stores directly. It sits outside the data path until a migration is required and then switches to in-band operation.
F5 ARX Series: Acquired from Acopia in 2007 and rebranded as F5 ARX, the F5 ARX series is an inline file-system virtualization appliance. Usually deployed as an active-passive cluster, its located between CIFS/NFS clients and heterogeneous CIFS/NFS file stores, presenting virtualized CIFS and NFS file systems to clients. Unstructured data is presented in a global virtualized namespace. Built like a network switch, it's available with 2 Gbps ports (ARX500), 12 Gbps ports (ARX2000) and 12 Gbps ports plus two 10 Gbps ports (ARX4000).
With a focus on data mobility and storage tiering, F5's ARX comes with strong data mobility and automated storage tiering features. Orchestrated by a policy engine, it performs bidirectional data movements between different tiers of heterogeneous storage in real-time and transparently to users. Similar to AutoVirt, policies are based on file metadata, such as last-accessed date, creation date, file size and file type.
The fact that F5 ARX is an appliance allows it to provide a performance- optimized product that's hard to match by a software-only solution. Built on a split-path architecture, it has both a data path that passes data straight through the device for tasks that don't involve policies, and a control path for anything that requires policies. "We are a DFS on steroids," said Renny Shen, product marketing manager at F5. "While DFS gives you share-level virtualization, we give you file-level virtualization."
Microsoft DFS: Microsoft DFS is a set of client and server services that allow an organization using Microsoft Windows servers to organize distributed CIFS file shares into a distributed file system. DFS provides location transparency and redundancy to improve data availability in case of failure or heavy load by allowing shares in multiple locations to be logically grouped under a single DFS root.
DFS supports the replication of data between servers using File Replication Service (FRS) in server versions up to Windows Server 2003, and DFS Replication (DFSR) in Server 2003 R2, Server 2008 and later versions.
Microsoft DFS supports only Windows CIFS shares and has no provision for bringing NFS or NAS shares into the DFS global namespace. Furthermore, it lacks a policy engine that would enable intelligent data movements. As part of Windows Server, it's free and a good option for companies whose file stores reside mainly on Windows servers.
|Open source NAS virtualization
NAS virtualization products are also available as open source software. For instance, the Apache Hadoop Distributed File System (HDFS) handles distribution and redundancy of files, and enables logical files that far exceed the size of any one data storage device. HDFS is designed for commodity hardware and supports anywhere from a few nodes to thousands of nodes. Another example of an open source file system is the Gluster clustered file system for building a scalable NAS with a single global namespace.
Instead of spending a lot of money for traditional NAS systems, an open source file system running on inexpensive hardware components seems like a good alternative. But open source file systems are usually not a good choice for the enterprise. They require significant tuning and maintenance efforts, as well as experts intimately familiar with the intricacies of the chosen software, and they don't come with the support that traditional NAS vendors offer. Availability, reliability, performance and support come first for enterprise storage, and these attributes are difficult to achieve with open source software. Open source file systems are a great choice for cloud storage providers and companies that have to make money on storage, as well as for the research and educational sector, but they're usually not the product of choice in the enterprise.
File virtualization outlook
Access to unstructured data hasn't changed much in the past 15 years, but big changes are happening now. NAS system architectures are moving toward more scalable, multi-node scale-out architectures with global namespace support. NAS behemoth NetApp finally incorporating technology acquired from Spinnaker in its Ontap 8 release, enabling customers to build multi-node NetApp clusters, is indicative of the change.
File-system virtualization products are complementing traditional scale-up and next-generation scale-out NAS systems to provide a global namespace across heterogeneous file stores in the enterprise. While they're currently mostly deployed for the purpose of data mobility and storage tiering, they're likely to play a significant role in the future in providing an enterprise-wide, global unified namespace for all unstructured data.
BIO: Jacob Gsoedl is a freelance writer and a corporate director for business systems. He can be reached at firstname.lastname@example.com.
Related Resources
Dig Deeper on Storage virtualization
AutoVirt's demise another blow to file virtualization
File virtualization software choices to eliminate file server sprawl
What to make of Windows Storage Server 2008 R2
File-system virtualization options to help reduce unstructured data growth


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In light of the progressive spread of the coronavirus and the associated effects on society, RWTH Aachen University has decided to cancel the Graduation Celebration this year.
Sponsoring the Graduation CelebrationCopyright: Kurt Beyer
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On September 5, 2020 it will be time again to say "Tschö wa" in the Aachen Laurensberg dressage stadium, where our graduates will given a festive farewell from university. Together with friends and family they will celebrate their successful completion of studies at RWTH and toast to the beginning of a new phase in their lives.
This celebration with anually over 4.500 participants and guests is only made possible through the help and support of partners and sponsors. Why not help give our graduates this unforgettable farewell and make use of this day for your own company at the same time?
You can position your logo in a prominent place, present your company along with your products and services and meet our students and graduates.
We would be more than happy to advise you on ways to get involved as partner and sponsor of the RWTH graduation celebration.


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Export 4 results:Author [ Title] Type Year
Filters: First Letter Of Title is H and Author is C. De Maria [Clear All Filters]
"HEMET: mathematical model of biochemical pathways for simulation and prediction of HEpatocyte METabolism", COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE, vol. 92, pp. 121–134, 2008.,
"HEMETBeta: improvement of hepatocyte metabolism mathematical model", COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING, 2011.,
"High throughput sensorized bioreactor for applying hydrodynamic pressure and shear stress stiumli on cell cutlures", 2011.,
"How dimension a substrate for the realisation of controlled micro- and bio-inspired environment", in Euromat-FEMS, Montpellier, France, 2011.,


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Always contact your supplier to determine if the coronavirus (COVID-19) will affect your order.
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3. Payment terms:FOB/EXW/CIF
1. Warranty
2. After-sales service
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5. Sample service
In 2005,Kaito(Suzhou) Construction Machinery Co., Ltd was founded. Kaito has developed into become one of the largest factories in the industry of producing replacement parts for road construction machinery, such as track pads, conveyor chains, conveyor belts, modules, rubber buffers, cutting tools, tool holders, water pumps and various other parts. Kaito is more than capable of providing its customers domestically and foreign with replacement parts for a variety of different brands.
At Kaito Construction Machinery, we believe that developing and manufacturing quality, industry- leading products to be of our top priority. Our company is committed to providing customers with the best all-around, rapid, and efficient services available.
Our clients spread all over China and exported to various countries and regions such as South Korea, Russia, USA, Spain, Malaysia, India and various others.


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Every year, natural disasters such as hurricanes and floods, disrupt drinking water supplies and wastewater disposal systems. Still however, many people are ill-prepared to deal with this when the situation arises. When it comes to emergency preparedness with your water supplies, you can never be too careful.
The most important thing you should remember is to only use water that has been properly disinfected for drinking, cooking and brushing teeth. You should also boil water. Boiling water will kill most disease-causing organisms that could be present. Boil the water for a minute, let it cool and store it in a clean container with a lid over it. It is also advised that you follow the advice from local officials, and to look for other sources of portable water in and around your home.
Here at Filters Fast, we know the dangers of drinking contaminated water, and the numerous health risks it poses. Below are great products that will keep your water safe and clean for consumption:
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Every year, we celebrate World Water Day and American Red Cross Month in recognition of the importance of clean water and helping those in need of it. Let us all do our part to aid others and to make the world a better place.