April 2025
Intermediate to advanced
432 pages
13h 18m
Italian
book
Cassandra: The Definitive Guide, (Revised) Third Edition, 3a edizione
by Jeff Carpenter, Eben Hewitt
Content preview from Cassandra: The Definitive Guide, (Revised) Third Edition, 3a edizione
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Capitolo 12. Manutenzione
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In questo capitolo analizziamo alcune cose che puoi fare per mantenere in salute il tuo cluster Cassandra. Il nostro obiettivo è quello di fornire una panoramica delle varie attività di manutenzione disponibili. Poiché le procedure specifiche per queste attività tendono a cambiare leggermente da una release all'altra, dovrai assicurarti di consultare la documentazione di Cassandra relativa alla release che stai utilizzando per assicurarti di non perdere nessun nuovo passaggio.
Indossiamo i nostri cappelli operativi e iniziamo!
Controllo della salute
Ci sono alcune cose fondamentali che dovrai verificare per assicurarti che i nodi del tuo cluster siano sani:
-
Usa
nodetool statusper assicurarti che tutti i nodi siano attivi e che riportino uno stato normale. Controlla la colonnaloadper ogni nodo per assicurarti che il cluster sia ben bilanciato. Un numero non uniforme di nodi per rack può portare a un cluster sbilanciato. -
Controlla
nodetool tpstatssui tuoi nodi per verificare la presenza di messaggi caduti, in particolare di mutazioni, poiché ciò indica che le scritture dei dati potrebbero essere andate perse. Un numero crescente di scritture di flush bloccate indica che il nodo sta inserendo dati in memoria più velocemente di quanto possano essere scaricati su disco. Entrambe queste condizioni possono indicare ...
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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.