February 2026
Intermediate to advanced
672 pages
25h 29m
German
book
Entwerfen von datenintensiven Anwendungen (German Edition), 2nd Edition
by Martin Kleppmann, Chris Riccomini
Content preview from Entwerfen von datenintensiven Anwendungen (German Edition), 2nd Edition
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Kapitel 6. Replikation
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Der Hauptunterschied zwischen etwas, das schiefgehen kann, und etwas, das unmöglich schiefgehen kann, ist, dass es in der Regel unmöglich ist, etwas, das unmöglich schiefgehen kann, zu erreichen oder zu reparieren, wenn es doch schiefgeht. Douglas Adams, Mostly Harmless (1992)
Douglas Adams, Mostly Harmless (1992)
Replikation bedeutet, dass man eine Kopie derselben Daten auf mehreren Rechnern speichert, die über ein Netzwerk verbunden sind. Wie in „Verteilte Systeme im Vergleich zu Einzelsystemen“ besprochen, gibt es mehrere Gründe, warum man Daten replizieren möchte, darunter:
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Damit die Daten geografisch nah bei deinen Nutzern bleiben (und so die Zugriffsverzögerung reduziert wird)
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Damit das System auch dann weiterläuft, wenn einige Teile fehlschlagen (und so die Verfügbarkeit und Ausfallsicherheit erhöht wird)
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Um die Anzahl der Maschinen, die Leseabfragen bedienen können, zu skalieren (und damit den Lesedurchsatz zu erhöhen) Backups und Replikation
In diesem Kapitel gehen wir davon aus, dass dein Datensatz klein genug ist, dass jeder Rechner eine Kopie des gesamten Datensatzes speichern kann. In Kapitel 7 werden wir diese Annahme lockern und die Aufteilung (Partitionierung) von Datensätzen besprechen, die für einen einzelnen Rechner zu groß sind. In späteren Kapiteln werden wir verschiedene Arten von Fehlern ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.