technical article on sentinel

[Felix Gallo]

http://aphyr.com/posts/283-call-me-maybe-redis

Didn't see this on the list, so I thought I'd share.  Especially because its headline is somewhat sensational.

I don't have any skin in the game as I currently totally disbelieve in clustered data stores and won't be using sentinel, but for those who are interested in sentinel, it raised some interesting issues and questions which might not yet be answered.

F.

[Forrest L Norvell]

I think Kyle's goal is less sensationalism than to make plain that partition tolerance and building or running systems that successfully meet the requirements for CP (i.e. that are both consistent and partition tolerant) is a lot harder than making some config changes. Even Riak doesn't do so well, at least with its default configuration.

The main takeaway for Sentinel seems to be that understanding how everything works has gotten kind of hard, and that maybe something simpler and dumber might be "better" in the sense of being easier to reason about.

The whole series is worth reading.

F

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[Salvatore Sanfilippo]

Hello, IMHO that was a great series of articles.

I don't think Kyle put in perspective very well what is the *goal* of
Sentinel if he thinks that a monitoring system that performs automatic
failover turns N Redis instances into a distributed store with
specific behaviors, the reality is that it handles only one thing, but
I'll be more clear about that in the article. That said, great series
of articles.

Cheers,
Salvatore

--
Salvatore 'antirez' Sanfilippo
open source developer - VMware
http://invece.org

Beauty is more important in computing than anywhere else in technology
because software is so complicated. Beauty is the ultimate defence
against complexity.
— David Gelernter