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From Jay Vyas <jayunit...@gmail.com>
Subject Re: Running HBase on Yarn … HoYa ?
Date Wed, 18 Sep 2013 20:43:53 GMT
How Are vendor specific versions of hbase running on yarn? Are they using Hoya?

On Sep 18, 2013, at 4:21 PM, Steve Loughran <stevel@hortonworks.com> wrote:

> Right now you are going to have to run HBase outside YARN, and on those
> nodes with HBase configure YARN to offer less capacity -CPU and RAM- than
> your (static) HBase demands will be.
> The Hoya stuff is still immature -which currently offers the advantage that
> I can make big changes to bits of the code and its persistent json
> specifications without worrying about breaking things. It's also been
> tracking the latest versions of Hadoop 2.1; which itself is in the final
> stages of being ready for production.
> What it is working towards is
> -being able to specify what you want in terms of an Hbase cluster:
> version, node resources to request off YARN, have Hoya bring up the
> cluster, and keep that cluster up
> -having YARN explicitly support long-lived services (see
> https://issues.apache.org/jira/browse/YARN-896 ; other applications like
> Samza share these needs)
> There's another problem one that is common to HBase & YARN or
> HBase-on-YARN, which is IO contention. We can use YARN's cgroup scheduling
> to restrict the CPU and RAM load that a YARN container can use -so stop MR
> jobs to cause HBase to swap out or be overloaded CPU-wise. What that
> doesn't address is disk IO bandwidth, because that goes through the HDFS
> datanodes -and that is shared across all processes as well as remote ones.
> Apart from that, some slides are up
> http://www.slideshare.net/steve_l/2013-0826hoyaforcodereview
> and the code is online
> https://github.com/hortonworks/hoya
> I'd welcome more participation in this,
> -steve
>> From: Michael Segel <michael_segel@hotmail.com>
>> Date: Mon, Sep 16, 2013 at 8:07 AM
>> Subject: Running HBase on Yarn … HoYa ?
>> To: "user@hbase.apache.org" <user@hbase.apache.org>
>> Hi,
>> I'm going to post this to the YARN Google Groups as well since this
>> problem intersects across both efforts…
>> So, running HBase on Yarn…
>> While its possible to bring up a Yarn cluster and manually start HBase
>> outside of Yarn, it seems that this would end up causing some massive
>> issues…
>> It seems that Yarn needs to know about all of the resources on Hadoop
>> cluster so that it can allocate resources. Running anything outside of Yarn
>> on the cluster, may cause Yarn to oversubscribe resources.
>> Is anyone seriously playing with Yarn and HBase?
>> HOYA seems not fully baked and I am making a lot of assumptions about Yarn
>> and HBase on Yarn.
>> Thoughts?
>> -Mike
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