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MongoDB – usporedba u odnosu na relacijske baze...
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Zoran
November 28, 2012
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MongoDB – usporedba u odnosu na relacijske baze podataka
Prezentacija predavanja održanog na WebCamp-u u Zagrebu 24.11.2012
Zoran
November 28, 2012
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Transcript
usporedba u odnosu na relacijske baze podataka Zoran Ugrina
Sadržaj • Ukratko o MongoDB-u • Rad sa MongoDB-om •
Migracija na MongoDB • Benchmarking
Popularnost
Uvod • Zašto MongoDB? • Razvoj počeo u listopadu 2007.
• Prvi public release veljača 2009. • Razvijeni driveri za sve veće programske jezike
MongoDB filozofija • Fleksibilnost • Snaga • Brzina / Skaliranje
• Jednostavnost korištenja
MongoDB filozofija
Osnove rada • Vrlo jednostavna instalacija i povezivanje s PHP-
om • Interaktivna JavaScript konzola • Specifičan način kreiranja baze i collectiona
JavaScript konzola
PHP i MongoDB $conn = new Mongo('localhost'); // access database
$db = $conn->test; // access collection $collection = $db->items; // insert a new document $item = array( 'name' => 'milk', 'quantity' => 10, 'price' => 2.50, 'note' => 'skimmed and extra tasty' ); $collection->insert($item); echo 'Inserted document with ID: ' . $item['_id']; // disconnect from server $conn->close();
Terminologija
Kreiranje baze i collectiona use ime_baze; db.createCollection(„users“); db.users.save({ ime: “Marko”,
prezime: “Marić”, telefon: “256-458”, tehnologije: [“html”,”php”,”mysql”] }); db.users.find().pretty();
Kreiranje field-ova
Kreiranje field-ova
Razlika u dizajnu baze
Razlika u dizajnu baze
Razlika u dizajnu baze
Razlika u dizajnu baze
Razlike u upitima
Razlike u upitima
Migracija • Object-relational mapping • 4MB max JSON file (import)
• Neizbježno ručno pisanje skripti • Ovisnost o resursima
Migrirani podaci • 2,074,854 filmova/serija/dokumentaraca • 3,546,425 glumaca/glumica/redatelja/… • 29,751,446
redova (agregacija) glumaca i filmova
Što se napravilo • Migracija dijela SQL-a u MongoDB •
Zašto ne postoji kvalitetan alat za potpunu migraciju?
Benchmarking • Nedostatak resursa za kvalitetno testiranje
Testovi drugih Prikaz koliko je puta MongoDB “brži” http://www.vedana.it/it/component/content/article/9-linux/62-testing-mongodb-vs-mysql-with-python-scripting-under-linux
Kada koristiti MongoDB • Ukoliko RDBMS ne može riješiti vaš
problem • Ukoliko je velika baza te je potrebno skaliranje i brži pristup podatcima • Ukoliko je potrebno spremati nestrukturirane podatke • Koristiti ga da se riješi samo određeni problem
Zaključak • Vrlo jednostavan za učenje / korištenje • Nova
ali dokazana tehnologija • Dostupna opširna dokumentacija, ali po potrebi i plaćeni support • Svakako isprobati (novi način razmišljanja)