This? http://shop.oreilly.com/product/0636920033943.do
2015-05-11 18:55 GMT-04:00 Michael Segel <[email protected]>: > Why would you expect to have a region allocated to all of the region > servers? > You generate a region based on either pre-splitting (you set the region’s > key range) , or you start with one region and grow from there. > > Please read either Lars George’s book (dated) or Nick Dimiduk’s book. > (Sorry but has Lars George ever done a second or third edition yet? ) > > > > On May 11, 2015, at 5:38 PM, Arun Patel <[email protected]> wrote: > > > > I have some basic questions on regions. > > > > 1) I have a 10 node HBase cluster. When I create a table in HBase, how > > many regions will be allocated by default? I looked at the HBase Master > UI > > and it seems regions are not allocated to all the Regionservers by > > default. How can I allocate the regions in all Region Servers? > Basically, > > This distributes the data in a better way If I am using a slated key. My > > requirement is to distribute the data across the cluster using salted > > keys. But, Having few regions is a constraint? > > > > 2) How does the rowkey to region mapping works? In Cassandra, we have a > > concept of assigning token range for each node. Rowkey will be assigned > to > > a node based on the token range. How does this work in HBase? > > > > Regards, > > Arun > > The opinions expressed here are mine, while they may reflect a cognitive > thought, that is purely accidental. > Use at your own risk. > Michael Segel > michael_segel (AT) hotmail.com > > > > > >
