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From Boris Tyukin <bo...@boristyukin.com>
Subject Re: "broadcast" tablet replication for kudu?
Date Fri, 16 Mar 2018 17:40:02 GMT
I'm new to Kudu but we are also going to use Impala mostly with Kudu. We
have a few tables that are small but used a lot. My plan is replicate them
more than 3 times. When you create a kudu table, you can specify number of
replicated copies (3 by default) and I guess you can put there a number,
corresponding to your node count in cluster. The downside, you cannot
change that number unless you recreate a table.

On Fri, Mar 16, 2018 at 10:42 AM, Cliff Resnick <cresny@gmail.com> wrote:

> We will soon be moving our analytics from AWS Redshift to Impala/Kudu. One
> Redshift feature that we will miss is its ALL Distribution, where a copy of
> a table is maintained on each server. We define a number of metadata tables
> this way since they are used in nearly every query. We are considering
> using parquet in HDFS cache for these, and Kudu would be a much better fit
> for the update semantics but we are worried about the additional
> contention.  I'm wondering if having a Broadcast, or ALL, tablet
> replication might be an easy feature to add to Kudu?
> -Cliff

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