There is no lock and it doesn't block existing reads or writes You're already on 3.11, but as a reminder for others there's a bug in 3.0 versions between (3.0.0 and 3.0.14) and (3.0 and 3.11.0) that can cause corruption when you add columns. It's fixed in both 3.11.0 and 3.0.14, so if you need to alter your table and you're on a 3.something version that isn't one of those, upgrade first.
-- Jeff Jirsa > On Sep 8, 2017, at 7:13 AM, Deepak Panda <deepak.pa...@gmail.com> wrote: > > Hi, > > For Cassandra 3.11, when we add a new column is added to an existing > table having huge number of rows and huge data manipulation going on > will there be any issues? > > Will the operations blocked till the column is added? > > Is the table locked during column addition? If yes, what type of lock? > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org
