The Elements of Computing Systems / Nisan & Schocken. Graph Theory (part 1 of 2) OrientDB. OrientDB unterstützt unterschiedliche Schemata-Modi (frei, fest und gemischt) und besitzt eine auf Anwendern und Rollen basierende Authentifizierung und Autorisierung. Unterstützt wird SQL als Abfrage-Sprache. OrientDB implementiert einen MVRB-Baum als Indizierungsalgorithmus, der sich vom Rot-Schwarz-Baum sowie vom B-Baum ableitet[1].
Der MVRB-Baum zeichnet sich durch schnelle Einfügungen und Suche aus. Eigenschaften[Bearbeiten] Weblinks[Bearbeiten] Einzelnachweise[Bearbeiten] Hochspringen ↑ MVRB-Tree description. MongoDB University. Apache CouchDB. Static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/de//archive/bigtable-osdi06. The Law of Leaky Abstractions. By Joel Spolsky Monday, November 11, 2002 There's a key piece of magic in the engineering of the Internet which you rely on every single day. It happens in the TCP protocol, one of the fundamental building blocks of the Internet.
TCP is a way to transmit data that is reliable. By this I mean: if you send a message over a network using TCP, it will arrive, and it won't be garbled or corrupted. We use TCP for many things like fetching web pages and sending email. The reliability of TCP is why every exciting email from embezzling East Africans arrives in letter-perfect condition. By comparison, there is another method of transmitting data called IP which is unreliable. Here's the magic part: TCP is built on top of IP. To illustrate why this is magic, consider the following morally equivalent, though somewhat ludicrous, scenario from the real world. Imagine that we had a way of sending actors from Broadway to Hollywood that involved putting them in cars and driving them across the country.