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From Shawn Heisey <apa...@elyograg.org>
Subject Re: Shards and Replicas
Date Thu, 19 Nov 2015 05:08:30 GMT
On 11/18/2015 9:02 PM, Troy Edwards wrote:
> I am looking for some good articles/guidance on how to determine number of
> shards and replicas for an index?

The long version:

https://lucidworks.com/blog/sizing-hardware-in-the-abstract-why-we-dont-have-a-definitive-answer/

The short version:

There's no quick formula for figuring out how much hardware you need and
how to divide your index onto that hardware.  There are too many
variables involved.  Building a prototype (or ideally a full-scale
environment) is the only reliable way to figure it out.

Those of us who have been doing this for a long time can make educated
guesses if we are presented with the right pieces of information, but
frequently users will not know some of that information until the system
is put into production and actually handles real queries.

The only general advice I have is this:  It's probably going to cost
more than you think it will.

Thanks,
Shawn


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