Svi povremeno čujemo riječ oblak^(Cloud) , ali siguran sam da mnogi od nas nisu baš sigurni u oblak^(Cloud) i računalstvo u oblaku^{(Cloud Computing)} . Stoga je prije svega važno razumjeti što je oblak.

Što je Cloud?

Oblak^(Cloud) je samo metafora za internet kada kažemo oblak, mislimo samo na internet i jednostavno na usluge koje koristimo putem interneta – putem naših web preglednika. Sada kada kažem Cloud Computing , onda ne postoji standardna definicija industrije koja govori o računalstvu u oblaku, s obzirom na činjenicu da je ovo u nastajanju i da samo nekoliko tvrtki ulaže u računalstvo u oblaku i virtualizaciju koje se često navode kao BUDUĆNOST TRENDOVI^{(FUTURE TRENDS)} .

Što je Cloud Computing?

Ali, jednostavnim riječima ,”

Cloud Computing is more than the few internet-based services which we access through our web browsers, it is the fundamental shift from the traditional client/server or n-tier architecture, and it primarily focuses on the effective utilization of the IT INFRASTRUCTURE “.

Većina davatelja usluga u oblaku^{(Cloud Service)} nudi ovu uslugu po modelu “ plati dok ideš ^{(pay as you go)}” . Pod modelom “platite po narudžbi” znači da plaćate samo usluge koje koristite i određeni broj resursa koje koristite. Naplaćuju vam se samo one usluge i resursi koje ste potrošili. Ukratko, sve što se nudi je zapravo usluga koju koristite.

Sigurno mislite da je to samo još jedan računski model, pa zašto bi se netko zanimao za njega? Pa^(Well) evo odgovora na to! Dopustite da vas ukratko upoznam s njegovim značajkama i siguran sam da ćete se složiti da je to model sljedeće generacije.

Značajke su sljedeće:

• Skalabilnost:^(Scalable:) To su visoko skalabilne usluge od tradicionalnih usluga koje teže doseći ograničenje na određenoj razini, ali one su dizajnirane i upravljane tako da udovolje potrebama ljudi diljem svijeta jer se te usluge repliciraju u podatkovnim centrima koji imaju vrlo dobra geo-distribucija.
• Automatizirano upravljanje uslugama^{(Automated Services Management)} : Pa, to jednostavno znači da ne morate brinuti o radnoj snazi, poslužiteljima, nadogradnji softvera, hardveru itd. svime upravlja tvrtka koja nudi usluge u oblaku. To ću razraditi u budućem postu o Windows Azureu^{(Windows Azure)} .
• Visoka dostupnost:^{(High Availability: )} One imaju gotovo 99,9999% usluga neprekidnog rada jer imaju tisuće podatkovnih centara diljem svijeta i imaju stotine instanci koje se repliciraju na njih, pa čak i ako jedan poslužitelj ne uspije, drugi priskače kako bi poslužio klijentu.
• Više zakupa^{(Multi-tenancy)} : jedan oblak –^{(Cloud –)} mnogi stanari, to je način na koji većina davatelja usluga u oblaku^(Cloud) , učinkovito koriste temeljnu IT infrastrukturu. Imaju mnogo klijenata čije usluge rade na jednom podatkovnom centru.
• Virtualizacija^{(Virtualization)} : to je zapravo najvažniji aspekt. Pružatelji usluga u oblaku^(Cloud) imaju podatkovne centre u kojima pokreću tisuće poslužitelja virtualno koristeći hipervizor koji povećava učinkovito korištenje resursa od samo 40-45% na oko 85%.

Dakle, ono što zapravo radi jest da od vas preuzima sav stres upravljanja vašim poslužiteljima, bazama podataka, sigurnosnim zakrpama, nadogradnjom softvera, infrastrukturom itd. (u slučaju javnog oblaka).

Neki uobičajeni mitovi o premještanju tvrtki na usluge u oblaku^{(Cloud Service)}

Kako bi bilo koja mala i srednja poduzeća bila uspješna, bitno je uključiti određene osobine kao što su poslovna agilnost, fleksibilnost i sposobnost uštede dodatnih troškova. Sve to, i druge stvari mogu doći prelaskom na Cloud tehnologiju^{(Cloud Technology)(Cloud Technology)} , ali zbunjujuća količina kontradiktornih informacija koje lebde na Internetu^(Internet) sprječava nas da napravimo pravi potez. Poznavanje činjenica zasigurno može pomoći u razbijanju mitova i raspršivanju pogrešnih predodžbi za koje možemo misliti da su istinite.

Mitovi o računalstvu u oblaku

Prvi mit^{(The first myth)} . Ako se naši podaci presele u oblak, naše poslovanje više neće imati kontrolu nad našom tehnologijom. Evo što trebate znati! Kada prijeđete na oblak, vrijeme utrošeno na održavanje hardvera i nadogradnju softvera značajno se smanjuje. Kako? Kapitalni proračun potrošen na održavanje poslužitelja na lokaciji za pohranu e-pošte i radna opterećenja uvelike je smanjen. Dakle, umjesto da trošite velike dijelove resursa na poslužitelje, možete razmišljati strateški kako biste podržali svoje poslovne potrebe na razboritiji način. To će vam pomoći da potrošite više vremena i energije na poboljšanje poslovanja i pokretanje agilnih inicijativa.

Drugi mit^{(The second myth)} . Čuvanje podataka na lokaciji sigurnije je nego u oblaku. Pravi? Sigurno ne! Vaši lokalni sustavi nisu sami po sebi sigurniji nego što bi bili u oblaku. Stručnjaci za sigurnost kažu da je problem kibernetičke krađe sve veći trend. Mnoge tvrtke su rutinski hakirane pa je sigurnost prerasla u posao s punim radnim vremenom jer je potreban tim stručnjaka koji će spriječiti kršenje sigurnosti. Srećom, neke od tvrtki koje nude usluge u oblaku poput Microsofta^(Microsoft) zapošljavaju najbolje i najpametnije u ovom poslu. Njegov tim koristi procese kao što su životni ciklus razvoja sigurnosti^{(Security Development Lifecycle)} ; prigušivanje prometa; te sprječavanje, otkrivanje i ublažavanje kršenja koja mnoge tvrtke nemaju resurse za osiguranje.

Osim toga, Office 365 također ima 99,9 posto financijski potkrijepljeno jamstvo neprekidnog rada i održava se u tijeku s najnovijim propisima i pravilima: HIPAA i Sarbanes-Oxley , Federalni zakon o upravljanju sigurnošću informacija^{(Federal Information Security Management Act)} ( FISMA ), ISO 27001 , Europska unija^{(European Union)} (EU ). ) Model klauzula^{(Model Clauses)} , okvir Safe Harbor između SAD-a i EU , Zakon o ^{(U.S.–EU Safe Harbor)}obiteljskim obrazovnim pravima^{(Family Educational Rights)} i privatnosti^{(Privacy Act)} ( FERPA ) i kanadski Zakon o zaštiti osobnih podataka^{(Canadian Personal Information Protection)} i elektroničkim dokumentima^{(Electronic Documents Act)} ( PIPEDA), da spomenemo samo neke.

Treći mit^{(The third myth)} . Morate sve premjestiti u oblak. Ukratko, to je scenarij na sve ili ništa. Nije istina! Cloud vam daje potpunu kontrolu za isporuku računalne snage i mogućnosti koje vaše poslovanje nužno zahtijeva.

Četvrti mit^{(The fourth myth)} . Oblak^(Cloud) košta poslove. Nije istina! Umjesto preuzimanja poslova, računalstvo u oblaku^(Cloud) je stvorilo radna mjesta.

Konačno^(Lastly) , mnogi vjeruju da vlade dobivaju pristup svim podacima ako su u oblaku. To je glavni strah koje mnoge tvrtke imaju u vezi s oblakom i time ih sprječava da usvoje ovu tehnologiju. Neutemeljeno je! Zašto? Upravo je IT tim dobavljača taj koji upravlja pristupom, postavlja prava i ograničenja te pruža pristup pametnom telefonu i opcije. Tvrtka ostaje jedini vlasnik i zadržava sva prava, naslov i interes za podatke pohranjene u oblaku. Štoviše, podaci se ne koriste za bilo kakvu vrstu oglašavanja ili u bilo koju drugu svrhu osim pružanja usluga koje ste platili.

Ovdje postoji hrpa postova o oblaku koje želite pogledati.^{(There are a bunch of posts here about the Cloud that you want to take a look at.)}

Ovi postovi govore o nekim od najboljih usluga računalstva^{(best cloud computing services)} u oblaku i besplatnim pružateljima usluga pohrane u oblaku .

Ovi linkovi također će vas zanimati:^{(These links will also interest you:)}

1. Vrste usluga u oblaku i Microsoft Cloud
2. Javni oblak naspram privatnog oblaka^{(Public Cloud vs Private Cloud)}
3. Hibridni oblaci^{(Hybrid Clouds)}
4. Činjenica o računalstvu u oblaku
5. Poslovi u računalstvu u oblaku^{(Cloud Computing Jobs)}
6. Budućnost računalstva u oblaku
7. Sigurnosni problemi s računalstvom u oblaku
8. Razlika između računalstva u oblaku i grid računalstva^{(Difference between Cloud computing and Grid computing)} .

What is Cloud and Cloud Computing? An introduction for beginners!

We all hear the word Cloud now and then but I, am sure many of us aren’t exactly very sure about Cloud and Cloud Computing. So first of all, it is important to understand,  what is the cloud.

What is Cloud?

Cloud is just a metaphor for the internet when we say cloud, we are just referring to the internet only and simply the services we use using the internet – through our web browsers. Now when I say Cloud Computing, then there is no standard industry definition which talks about cloud computing, given the fact that this is in a nascent stage and the only handful of companies are investing in cloud computing & virtualization which are often cited as the FUTURE TRENDS.

What is Cloud Computing?

But, in simple words,”

Cloud Computing is more than the few internet-based services which we access through our web browsers, it is the fundamental shift from the traditional client/server or n-tier architecture, and it primarily focuses on the effective utilization of the IT INFRASTRUCTURE “.

Most Cloud Service providers offer this service on the “pay as you go” model. By “pay as you go” model it means that you pay only for the services you use and a number of the resources you use. You are billed for only those services & resources that you consumed. In short, everything that is offered is actually a service that you use.

You must be thinking it’s just another computational model, so why should one have an interest in it? Well here is the answer to it! Let me brief you with the features of it, and I am sure you will agree that it is a next-generation model.

Features are as follows:

• Scalable: These are highly scalable services than the traditional services that tend to reach a limit at a certain level, but these are designed and managed to cater to the needs of people around the world because these services are replicated at the data centers which have a very good geo-distribution.
• Automated Services Management: Well, it simply means you don’t have to worry about the manpower, servers, software upgrades, hardware, etc. all are managed by the cloud services offering company. I will elaborate this in a future post on Windows Azure.
• High Availability: These have almost 99.9999% uptime services because they have thousands of data centers across the globe and they have hundreds of instances which are replicated on them, so even if one server fails other jumps in to serve the client.
• Multi-tenancy: One Cloud – many tenants, that is the way most Cloud service providers, effectively utilize underlying IT infrastructure. They have many clients whose services are running on a single data center.
• Virtualization: It actually is the most important aspect of it. Cloud service providers have data centers where they run thousands of servers virtually using a hypervisor which increases the effective utilization of the resources of a mere 40-45% to around 85%.

So what it actually does, is that it takes all the stress of managing your servers, databases, security patches, software upgrades, infrastructure, etc. ( in the case of public cloud) from you.

Some common Myths about moving Businesses to Cloud Service

For any small and medium-sized businesses to be successful, it is essential to incorporate certain traits like business agility, flexibility,  and the ability to save extra costs. All this, and others can come by moving to Cloud Technology but the bewildering amount of contradictory information floating around on the Internet stop us from making the right move. Knowing the facts can certainly help to bust cloud myths and dispel wrong notions that we might think are true.

Cloud computing myths

The first myth. If our data moves to the cloud, our business will no longer have control over our technology. Here’s what you need to know! When you move to the cloud, time spent in maintaining hardware and upgrading software is significantly reduced. How? The capital budget spent on maintaining servers on-premises for email storage and workloads is greatly reduced. So, rather than spending large portions of resources on servers, you can think strategically to support your business needs in a more prudent manner. This will help you spend more time and energy in improving business operations and launching agile initiatives.

The second myth. Keeping data on-premises is safer than in the cloud. True? Certainly not! Your on-premises systems aren’t inherently more secure than they’d be in the cloud. Security experts say there’s a rising trend seen in cyber theft problem. Many companies are routinely hacked so security has grown into a full-time job as it requires a team of experts to thwart security breaches. Fortunately, some of the companies offering cloud services like Microsoft hires the best and brightest in this business. Its team uses processes such as the Security Development Lifecycle; traffic throttling; and preventing, detecting, and mitigating breaches that many companies don’t have the resources to ensure.

Apart from this, Office 365 also has a 99.9 percent financially backed uptime guarantee and keeps itself up to date with the latest regulations and rules: HIPAA and Sarbanes-Oxley, Federal Information Security Management Act (FISMA), ISO 27001, European Union (EU) Model Clauses, U.S.–EU Safe Harbor framework, Family Educational Rights and Privacy Act (FERPA), and the Canadian Personal Information Protection and Electronic Documents Act (PIPEDA), to name a few.

The third myth. You have to move everything to the cloud. In short, it is an all-or-nothing scenario. Not true! Cloud gives you complete control for delivering the computing power and capabilities that your business necessarily demands.

The fourth myth. Cloud costs jobs. Not true! Instead of taking jobs, Cloud computing has created jobs.

Lastly, many believe governments get access to all the data if it is in the cloud. This is a major fear many businesses have about the cloud and thus stops them from adopting this technology. It’s unfounded! Why? It is just the vendor IT team that manages access, sets up rights and restrictions, and provides smartphone access and options. The company remains the sole owner and retains all the rights, title, and interest in the data stored in the cloud. Moreover, the data is not used for any sort of advertising or for any purpose other than providing you services that you have paid for.

There are a bunch of posts here about the Cloud that you want to take a look at.

These posts talk of some of the best cloud computing services and free Cloud Storage Providers.

These links will also interest you:

1. Types of Cloud services & Microsoft Cloud
2. Public Cloud vs Private Cloud
3. Hybrid Clouds
4. Fact about cloud computing
5. Cloud Computing Jobs
6. The Future Of Cloud Computing
7. Security issues with Cloud computing
8. Difference between Cloud computing and Grid computing.

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