Hi Sage,
I have a similar question, I need 2 replicas (one on each rack) and I would
like to know whether the following rule always save primary on rack1?
rule data { ruleset 0 type replicated min_size 2 max_size 2 step take rack1
step chooseleaf firstn 1 type host step emit step take rack2 s
On Mon, 20 Jan 2014, Arnulf Heimsbakk wrote:
> Hi,
>
> I'm trying to understand the CRUSH algorithm and how it distribute data.
> Let's say I simplify a small datacenter setup and map it up
> hierarchically in the crush map as show below.
>
>root datacenter
> /\
Hi,
I'm trying to understand the CRUSH algorithm and how it distribute data.
Let's say I simplify a small datacenter setup and map it up
hierarchically in the crush map as show below.
root datacenter
/\
/ \
/\
a b
