Its a platform managed lower the apache software footing and its an notorious spring and its negotiate delay big facts delay any facts fashion structer semi structer or unstructers and concede the effect in very concise age it allows to is-sue delay structured and unstructured facts arrays of extent from 10 to 100 gb and level past. V.Burunova and its structer is a order of gatherings or one each of them contains orders of nodes too and each gathering has two fashion of node designate node and facts node designate node is a rare node on gathering and it knows any facts arrest residuum on gathering and facts node is the remining node in gathering and that feel performed by using a set of servers which designated a gathering. Hadoop has two laminas avoid contemporaneously primitive lamina is mapreduce and it is-sue is disjoined facts ruleing opposing multiple servers and the remedy one is hadoop nice finish method hdfs and its is-sue is storing facts on multiple gatherings and these facts are divided as a set of arrests. Hadoop mould secure the is-sue is punish on gatherings and it can discover and regarner any untruth or need for one or past of connecting nodes and by this way hadoop efforts increasing in kernel ruleing and storage extent and haughty availability. Hadoop is usually used in a abundant gathering or a notorious outvie advantage such as yahoo. Facebook twitter and amazon hadeer mahmoud 2018 hadoops features: Scalable: Hadoop effectual to is-sue delay gigantic applications and it can run dissect garner rule dissect abundant total of facts opposing thousands of nodes and servers which feel thousands terabytes of facts or past too it can add attached nodes to gatherings and these servers is-sue analogous. Hadoop ameliorate than unwritten mental factsbase methods owing rdbms jangle open to negotiate delay gigantic facts. Single transcribe multiple decipher the facts on gathering can be decipher from multiple spring at the selfselfsame age facts avalibility: When facts is sent to a facts node that hadoop creates multiple copies of facts on other nodes in the gathering to guard facts availeffectual if there a need on one of nodes on gathering.