May 2012
Intermediate to advanced
200 pages
3h 39m
German
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UUIDs
CouchDB generiert die DocIDs für Dokumente über einen UUID-Algorithmus, sofern Sie sie nicht vorher selbst festlegen. In der Sektion uuids können Sie einen von drei Algorithmen wählen.
algorithm = algorithm
Folgende Algorithmen stehen Ihnen für das Generieren von UUIDs zur Verfügung:
- random
128-Bit-Zufalls-Hex-String
- sequential
Zweiteiliger String, bei dem die ersten 26 Hex-Zeichen zufällig generiert und die letzten sechs sequenziell hochgezählt werden. Sobald diese sechs Zeichen erschöpft sind, wird ein neuer 26 Hex-Zeichen langer String erzeugt, und der Prozess beginnt von vorn. Sequentielle UUIDs haben sich in der Praxis als schnell erwiesen. Ab der Version 0.11 von CouchDB ist das die Standardeinstellung.
- utc_random
Die ersten 14 Zeichen stellen ...
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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.