Hello Kristoffer, HBase row mutations are atomic ( http://hbase.apache.org/acid-semantics.html ), which include put . So when you overwrite a row it is not possible for another processes to read half old / half new data. They will either read all old or all new data if the put succeeds. It is also not possible for put to fail in the middle leaving a partly modified row.
Best, Mohamed On Fri, Apr 19, 2013 at 1:53 PM, Kristoffer Sjögren <sto...@gmail.com>wrote: > Hi > > Is it possible to completely overwrite/replace a row in a single _atomic_ > action? Already existing columns and qualifiers should be removed if they > do not exist in the data inserted into the row. > > The only way to do this is to first delete the row then insert new data in > its place, correct? Or is there an operation to do this? > > Cheers, > -Kristoffer >
