Hybrid Cloud Computing Model


In hy­brid cloud mod­els, these seem­ingly po­larised data mi­gra­tion strate­gies (public and pri­vate cloud) are in­ter­twined to cre­ate an in­te­grated and au­to­mated cloud man­age­ment sys­tem. Gartner es­ti­mates 74% of all or­gan­i­sa­tions are us­ing both pub­lic and pri­vate cloud so­lu­tions; ergo: us­ing hy­brid cloud com­put­ing. This per­cent­age is ex­pected to rise. By 2017, half of all large or­gan­i­sa­tions glob­ally will have de­ployed a com­plete hy­brid cloud in­fra­struc­ture.

Public & Private Cloud Computing

The ben­e­fits of pub­lic cloud lie in its flex­i­bil­ity and scal­a­bil­ity, as well as its rel­a­tive eco­nomic ad­van­tage. This eco­nomic ad­van­tage man­i­fests in the form of sav­ings through economies of scale. (Gmail is an ex­am­ple of pub­lic cloud.)

In com­par­i­son, the ben­e­fits of pri­vate cloud lie in its un­par­al­leled suit­abil­ity for or­gan­i­sa­tion-spe­cific tasks and processes. Because cloud mi­gra­tion com­pa­nies can de­velop cus­tom made cloud ser­vices and so­lu­tions, and de­liver these in a soft­ware as a ser­vice (SaaS), pri­vate clouds have a greater po­ten­tial. Furthermore, pri­vate clouds gen­er­ally pro­vide greater data se­cu­rity. However, this en­hanced cloud se­cu­rity typ­i­cally re­quires the cur­tain­ing of third party APIs (application pro­gram­ming in­ter­face).

There is rarely a black and white choice be­tween pub­lic and pri­vate cloud ser­vices, as each op­tion de­prives an or­gan­i­sa­tion of some of the key ben­e­fits of the al­ter­na­tive.

Hybrid Cloud: The Best of Both Worlds In Cloud Migration

The hy­brid cloud model pro­vides a so­lu­tion for the pub­lic-pri­vate cloud dilemma, and pro­vides or­gan­i­sa­tions with the ad­van­tages of cloud com­put­ing while si­mul­ta­ne­ously mit­i­gat­ing some of the po­ten­tial pit­falls of a cloud mi­gra­tion.

Benefits of Hybrid Cloud Computing

The hy­brid cloud model al­lows or­gan­i­sa­tions to have in­creased con­trol over their cloud mi­gra­tion. This re­sults from the free move­ment of var­ied types of data across plat­forms. This is par­tic­u­larly valu­able in dy­namic or highly change­able work­loads. For ex­am­ple, a trans­ac­tional or­der en­try sys­tem that ex­pe­ri­ences de­mand spikes dur­ing cer­tain pe­ri­ods is a good hy­brid cloud can­di­date. The ap­pli­ca­tion can run on a pri­vate cloud gen­er­ally, but use cloud burst­ing and ac­cess ad­di­tional com­put­ing re­sources from a pub­lic cloud when de­mands spike.

Generally, hy­brid clouds are cheaper than pri­vate clouds and more se­cure than pub­lic clouds. They can also in­cor­po­rate or­gan­i­sa­tion-spe­cific tasks and processes, a key ad­van­tage of pri­vate cloud while si­mul­ta­ne­ously tak­ing ad­van­tage of the scal­a­bil­ity of pub­lic cloud.

Risks of Hybrid Cloud Computing

Hybrid cloud so­lu­tions are dif­fi­cult to plan and im­ple­ment, both from a tech­ni­cal and a strate­gic per­spec­tive. This is be­cause of the fact that while both pub­lic and pri­vate cloud largely of­fer straight-for­ward so­lu­tions in­di­vid­u­ally, choos­ing the best as­pects and find­ing an op­ti­mal bal­ance be­tween the two is time-con­sum­ing and risky.

In or­der to mit­i­gate some of the as­so­ci­ated risks, hy­brid clouds re­quire con­tin­u­ous test­ing and op­ti­mi­sa­tion. Because of this, some of the ben­e­fits ac­cru­ing from hy­brid cloud com­put­ing may be long-term and the out­come of an on­go­ing im­ple­men­ta­tion, mon­i­tor­ing, and analy­sis.

There is no one-size-fits-all ap­proach to hy­brid cloud com­put­ing and its ben­e­fits rely on an ef­fec­tive im­ple­men­ta­tion by the or­gan­i­sa­tion and the cloud mi­gra­tion com­pany. Effective im­ple­men­ta­tion of hy­brid cloud com­put­ing is char­ac­terised by iden­ti­fi­ca­tion of the best com­bi­na­tion of pub­lic and pri­vate cloud el­e­ments in ac­cor­dance with or­gan­i­sa­tional needs.


In con­clu­sion, or­gan­i­sa­tions should first un­der­stand what their goals and strate­gies are in or­der cor­rectly choose a cloud so­lu­tion. The pub­lic-pri­vate op­tions should be eval­u­ated in light of ad­van­tages and dis­ad­van­tages of each, and how these align with or­gan­i­sa­tion goals and strate­gies. In many cases or­gan­i­sa­tions are dis­cov­er­ing they are best served by a hy­brid cloud so­lu­tion.

The rise of hy­brid cloud com­put­ing is just one trend in cloud com­put­ing.

Check out our Legacy Modernisation Resource Hub for more in­for­ma­tion about hy­brid clouds and how they might ben­e­fit your com­pany.

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Mitchell Tweedie

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