Hi Mike, > Running RS on a machine where DN isn't running?
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. > > Running RS on a machine where DN isn't running? > So then the RS can't store its regions locally. Not sure if that would ever > be a good idea or recommended. > > 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.... > > Following KISS is a much better way of life than taking Crystal Meth. Its one > way to avoid those nasty 'dead hooker problems'. * > > *<rant> > <explanation> > Just to explain KISS and what I mean by a 'dead hooker' > problem... > > KISS = Keep It Simple Stupid > 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. > > '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. > > 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. > </explanation> > > So here's my rant... > > 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. > > When things don't work, they ultimately post here and wonder why they > don't work. > > 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. > > Dead Hooker problems may be a great plot device, but in real life, when > under a time crunch, they are something one should avoid. ;-) > > </rant> > > 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...) > > 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. > > 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. :-) > > 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... ;-) > > HTH > > -Mikey > > > > On Jul 1, 2012, at 7:41 PM, Andrew Purtell wrote: > >> 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. >
