I have to install hadoop and hbase on 4 machines.
I have found latest version of hadoop-2.6.0 and hbase-0.98.9-hadoop2-bin.
1)Are they compatible?
2)How I should install hbase and hadoop on 4 machines i.e. how many masters and slaves etc.?
Answering your questions :
See the Hbase-Hadoop compatibility link . hbase-0.98.9 should support hadoop-2.6.0.
You have two options
1 master node and 3 slave nodes. (Since you have only 4 nodes this configuration would be suffice)
If you wanted to enabled HA, you can go for 2 master nodes and 2 slave nodes.
Considering the first question, I was trying to find the answer myself and found this in hbase docs:
"S" = supported
"X" = not supported
"NT" = Not tested
来源：https://stackoverflow.com/questions/27798014/latest-compatible-version-of-hadoop-and-hbase