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{"id":103,"date":"2005-09-11T14:13:27","date_gmt":"2005-09-11T12:13:27","guid":{"rendered":""},"modified":"2021-02-10T00:03:39","modified_gmt":"2021-02-09T23:03:39","slug":"archive-mysql-grosse-datenbestaende_103","status":"publish","type":"post","link":"https:\/\/opendb.de\/mysql\/archive-mysql-grosse-datenbestaende_103\/","title":{"rendered":"Archive: MySQL f\u00fcr gro\u00dfe Datenbest\u00e4nde"},"content":{"rendered":"

MySQL will mit seiner neuen „Archive Storage Engine“ f\u00fcr MySQL 5.0 eine Antwort auf steigende Datenvolumen geben. Die neue Storage-Engine stellt eine Alternative zu komprimierten MyISAM-Tabellen dar und verspricht gegen\u00fcber diesen erhebliche Vorteile.<\/p>\n

Die neue „Archive Storage Engine“ soll gro\u00dfe Datenmengen auf kleinem Raum unterbringen und dabei mitunter effizienter zu Werke gehen als die \u00fcbrigen Storage-Engines von MySQL. Gedacht ist das Ganze zur Archivierung von Datenbest\u00e4nden, die f\u00fcr gew\u00f6hnlich ausgelagert werden, mit der Storage-Engine Archive aber jederzeit zur Verf\u00fcgung stehen. <\/p>\n

Zwar unterst\u00fctzt MySQL seit Jahren komprimierte MyISAM-Tabellen, um das Datenvolumen einer Datenbank zu reduzieren, doch bringen die gepackten MyISAM-Tabellen einige Unannehmlichkeiten mit. Soll eine Tabelle gepackt werden, muss zuvor die entsprechende Datenbank offline genommen werden, was in vielen Anwendungsszenarien undenkbar ist, zumal hierzu ein eigenst\u00e4ndiges Werkzeug auf Kommandozeilenebene bem\u00fcht werden m\u00fcsste. Zudem erlauben gepackte MyISAM-Tabellen nur einen Lesezugriff, \u00c4nderungen am Datenbestand sind nach dem Komprimieren nicht mehr m\u00f6glich. <\/p>\n

Archive soll demgegen\u00fcber erhebliche Vorteile bieten, die Kompression erfolgt mittels einer DLL, es k\u00f6nnen nach der Kompression auch Daten zur Tabelle hinzugef\u00fcgt werden und es wird ein konsistenter Lesemechanismus unterst\u00fctzt, d.h. Lesezugriffe blockieren keine Schreibzugriffe. Dar\u00fcber hinaus soll sich mit der neuen Storage-Engine im Vergleich zu gepackten MyISAM-Tabellen mehr Platz sparen lassen. Gegen\u00fcber MyISAM (ungepackt) spricht MySQL von rund 75 Prozent, gegen\u00fcber InnoDB von 83 Prozent Einsparpotenzial. Im Vergleich zu gepackten MyISAM-Tabellen liegt Archive rund 7 Prozent vorn.<\/p>\n

weiter lesen auf: http:\/\/www.golem.de\/0509\/40295.html<\/a><\/p>","protected":false},"excerpt":{"rendered":"

MySQL will mit seiner neuen „Archive Storage Engine“ f\u00fcr MySQL 5.0 eine Antwort auf steigende Datenvolumen geben. Die neue Storage-Engine stellt eine Alternative zu komprimierten MyISAM-Tabellen dar und verspricht gegen\u00fcber diesen erhebliche Vorteile.<\/p>\n

Die neue „Archive Storage Engine“ soll gro\u00dfe Datenmengen auf kleinem Raum unterbringen und dabei mitunter effizienter zu Werke gehen als die \u00fcbrigen Storage-Engines von MySQL. Gedacht ist das Ganze zur Archivierung von Datenbest\u00e4nden, die f\u00fcr gew\u00f6hnlich ausgelagert werden, mit der Storage-Engine Archive aber jederzeit zur Verf\u00fcgung stehen.
\n
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