Pfupiso Database utariri nehurongwa

mabasa ose evanhu ari zvakabatana chaizvo siyana mashoko Directories uye Databases. The Library yokunyoresa, nebhuku rokunyorera, kero yako nharembozha kana piritsi - ichi hachisi mazita rakazara muronga mashoko yatinoshandisa. Asi makombiyuta kufanana zvakarurama, isu saka kupa tsananguro.

Saka, mumwe Database (db) - kutaridza zvine musoro kufanana umboo kuti rinotsanangura mashoko mamiriro zvinhu zviri siyana pasi munzvimbo uye kupatsanurwa pamwe midziyo kombiyuta.

Database kutarisirwa hurongwa chinhu-software uye mutauro ezvinhu kusika, achitarisira uye processing ruzivo zvigadziko. Rakavapa Database:

• Shandai nezvigadziko kunze (disks, matepi, etc ...) uye RAM;
• Kugoverana vanozvishandisa;
• changed kuzvidzora, archiving uye Database kupora;
• kupa kuwana mutauro mashoko kugadzira ;
• Zvaitibatsira pakusikwa, nadzurudzo, uye Database zvakanaka.

Zvichitaurwa zviri nyore, kuti Database anosarudza kuti nzira kuchengetwa, uye Database rinopa nzira kugadzira. Uyezve, Database Kutarisira hurongwa vari rakakamurwa vakawanda kushandiswa hurongwa kuti anogona kubata siyana mashoko uye specialized rakagadzirirwa imwe nyaya nzvimbo kana mhando ruzivo. Muenzaniso mumwe unyanzvi Database Kutarisira hurongwa vari chinhu vaifarira.

Ndeyeukama Management System

Sezvo veMubatanidzwa kombiyuta Databases chave mienzaniso yakawanda basa ravo, asi hukama muenzaniso chainyanya nokudenga. Zviri kufanana vanochengeta mashoko matafura, anovimbisa kuvimbika uye shoma redundancy mashoko. Table muenzaniso akanga kushandiswawo vakawanda pasi nzvimbo, uye musika ane ndeyeukama Database utariri hurongwa akatanga kukura nokukurumidza. The nhamba inoratidza muenzaniso ndeyeukama maumbirwo "nehwaro vadzidzi."

ndeyeukama DBMSs All kutsigira ANSI SQL mutauro mureza uye mirayiridzo inokosha hukama womuenzaniso, iyo inoita chikumbira kumhanya pamusoro Databases siyana. Uyezve, Databases huru vane zvavo SQL chiwedzerwa kuwedzererwa. Mienzaniso management hurongwa Database nokuda pamwero mukuru muzvirongwa - uyu Microsoft SQL Server uye pangataura.

Hukama womuenzaniso vakabudirira kushandiswa kukura Internet muzvirongwa. Miyenzaniso MySQL Database uye PostgreSQL.

NoSQL Michina

The kuwedzera mashoko Mavhoriyamu uye kunzwisisa ukama zvakakonzera chidzoke idzva Database utariri enyika. Information akarega kuva dzakazvimirira mumwe mumwe, uye dzimwe nguva kunyange zvisingaiti kuti mukanyatsochengeta kutsanangura mamiriro ayo. Ndeyeukama Databases vanogona kuvazve kurarama mabasa akadaro. Izvi zvakaita kuti chidzoke itsva mhando mashoko Databases uye kutarisirwa enyika, pamwe aizivikanwa NoSQL ( «hapana SQL»).

The chikuru Mapoka ose NoSQL Databases:

1. "Key Kukosha '. The inonyanya kufarirwa Database - Redis, Voldemort, Tokyo Cabinet uye Dynomite.
2. Miitiro inoburitsa zvinhu zvakanyatsofanana Database BigTable. Rakanga yakataurwa Google kuti munyika kushandiswa search engine. pamutemo BigTable Haisi kupiwa, asi pane Database pamusoro wayo hwaro. It Hadoop, Hypertable uye Cassandra.
3. Document vaifarira. The kupfuura mukurumbira Berkeley db XML, MongoD, dziripo uye CouchDB.
4. Zvichienderana mujinga kuti girafu dzidziso. Yaishandiswa Neo4j, vaNoa graphDB uye AllegroGraph.

ramangwana DBMS

Market ndeyeukama Database Kutarisira gadziriro kuramba kukura uye kuwedzera kuda kushandisa NoSQL-kugadzira. Zvechokwadi, muna "chaiwo» SQL akatengesa guru yakawanda-software enyika kunosiyana kunzwisisa, uye navo pane vakadaro pamusika hofori akafanana Microsoft uye pangataura. Asi vamwe chokwadi tinogona kufungidzira kuti NoSQL mumakore anouya achagona yekudyidzana ndokudzinga vatungamiriri kukura kunzwisisa mashoko enyika.