Help on bucket quorums

John Daily jdaily at basho.com
Sat Jun 28 12:20:15 EDT 2014


I don't have time at the moment to respond in more detail, I'm afraid, but
you should find this blog series quite useful.

http://basho.com/understanding-riaks-configurable-behaviors-part-1/


Sent from my iPhone

On Jun 28, 2014, at 5:56 AM, Alex De la rosa <alex.rosa.box at gmail.com>
wrote:

Hi there,

Can somebody help me understand a bit better the bucket quorums? I will use
the Python API to write code examples:

Imagine we are building a web app like twitter, and we want fast read
(although not need to be consistent) and safe writings, this R/W
combination is appropriate?

bucket = client.bucket('twits')

bucket.r = 1
bucket.w = 3

# OR

bucket.set_property('r', 1)
bucket.set_property('w', 3)

Which method is better to use? or are just exactly the same?

Imagine that in this new case, we want to focus on writing fast (normally
we will write more "twits" than read them)... which would be the most
appropriate/suggested quorums?

Also, what's really the difference between "r" and "pr"? what is a "primary
replica"?

If i set up bucket.w = 1, it will still do the 3 copies (n_val) in the
background but will reply "true" once 1 copy is saved, right?

Thanks,
Alex

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