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Subject: Re: HBASE -- Regionserver and QuorumPeer ?
From: Lars George <lars.george@gmail.com>
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Date: Mon, 2 Jul 2012 09:41:29 +0200
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To: user@hbase.apache.org

Hi Mike,

> Running  RS on a machine where DN isn't running?=20

I am not following here. Andy said that both are on the same node. Where =
in this thread did someone imply something else? Just curious.

Cheers,
Lars


On Jul 2, 2012, at 7:11 AM, Michael Segel wrote:

> I'm sorry I'm losing it.=20
>=20
> Running  RS on a machine where DN isn't running?=20
> So then the RS can't store its regions locally. Not sure if that would =
ever be a good idea or recommended.=20
>=20
> Thought the initial question is running ZK on the same node as a RS =
which isn't a good idea and a recipe for failure....
>=20
> Following KISS is a much better way of life than taking Crystal Meth. =
Its one way to avoid those nasty 'dead hooker problems'. *
>=20
> *<rant>
> 	<explanation>
> 		Just to explain KISS and what I mean by a 'dead hooker' =
problem...
>=20
> 		KISS =3D Keep It Simple Stupid=20
> 		This is an engineering principle used to teach =
engineering students that the best solutions are the ones that are =
straight forward and that if you attempt to get too clever, you always 		=
get some sort of blow back in your face.  It usually hurts and its =
always self inflicted.
>=20
> 		'dead hooker problems'  - are the theoretical problems =
of how to get rid of the dead hooker from your hotel room after your =
party of Hookers, Booze and either Crystal Meth or 				=
Cocaine goes terribly wrong and you wake up the next morning with a =
nasty hangover and a dead body that you have to get out of your hotel =
room before the cleaning ladies come 		knocking on your hotel =
room door. While I've never experienced this... I can't recall how many =
movies have this as a plot or sub plot.=20
>=20
> 		Not that I'm attempting to advocate drugs or killing =
hookers, unless its with a type writer or text editor when you want to =
write your next failed movie script.=20
> 	</explanation>
>=20
> 	So here's my rant...=20
>=20
> 	I'm not picking on the OP, but in general there's a class of =
posts where the OP starts a thread by ignoring the common wisdom =
captured in books, blogs and Apache wikis when setting up 	a =
cluster.=20
>=20
> 	When things don't work, they ultimately post here and wonder why =
they don't work.=20
>=20
> 	The key to happiness is to not ignore the conventional wisdom =
and when starting out with Hadoop,  follow the suggested set ups. =
Remember that the key is to first grok Hadoop before 	you attempt and =
doing more advanced things in terms of cluster configurations. That is =
what is meant by KISS. Accept that Hadoop is just a tool used by many to =
solve problems requiring 	a parallel framework.=20
>=20
> 	Dead Hooker problems may be a great plot device, but in real =
life, when under a time crunch, they are something one should avoid.  =
;-)=20
>=20
> </rant>
>=20
> For those of you who don't appreciate my sense of humor, try another =
example... (Also note... I don't know how this will translate to another =
language other than English so the meaning of this could be lost in =
translation...)=20
>=20
> Your wife has invited a bunch of her co-workers, including her boss, =
over for a dinner. You, being the good spouse are responsible for some =
of the meal prep. Rather than go with a tried and true recipe, you =
decide to try something new. And not only try a new recipe, you also =
decide to improvise and try new ingredients and do your own thing.   Not =
really a good idea, and unless you are incredibly lucky, or a really =
good cook with a talent for creating new recipes, you are more than =
likely going to end up in the dog house.=20
>=20
> Take it from a guy who usually lives in the dog house for one reason =
or another... following the recipes and not trying something new when =
the pressure for success is on... much less stress in your life.  :-)=20
>=20
> Again, with respect to Hadoop, there are a lot of moving parts where =
things can go wrong. I've got this drinking buddy named Murphy... you =
know the guy, he wrote this law... ;-)
>=20
> HTH
>=20
> -Mikey
>=20
>=20
>=20
> On Jul 1, 2012, at 7:41 PM, Andrew Purtell wrote:
>=20
>> A typical and recommended configuration is HBase RegionServer and =
HDFS
>> DataNode colocated on the nodes. The DataNode will use locally
>> attached disk to store and serve blocks.
>=20