The HBase client scanner goes through the regions in the scan range one at a time, making call to the region server. See this pending JIRA for the relevant discussion. https://issues.apache.org/jira/browse/HBASE-1935
Thanks. Jerry On Sun, Mar 13, 2016 at 11:37 AM, Shushant Arora <shushantaror...@gmail.com> wrote: > Does hbase scan or get is single threaded? > Say I have hbase table with 100 regionservers. > > When I scan a key rangle say a-z(distributed on all regionservers), will > the client make calls to regionservers in parallel all at once or one by > one.First it will get all keys from one regionserver then make a next call > to another regionserver in lexicographic order of keys? > > If it makes call in parallel then how does it ensure result to be sorted by > key always? > > Thanks! >
