import uuid unique_key = uuid.uuid4() if you using Python.
2010/4/28 Mark Robson <mar...@gmail.com> > 2010/4/26 Roland Hänel <rol...@haenel.me>: >> > Typically, in the SQL world we use things like AUTO_INCREMENT columns >> that >> > let us create a unique key automatically if a row is inserted into a >> table. >> > > auto_increment is an antipattern; it adds an extra key which you don't need > (usually). If your data has a natural candidate key, use that. If not, add > extra parts until you have a unique key. > > If you are using OrderPreservingParitioner, it is really important to use > keys which can give you a lexically sortable range to scan when you need to > find them, so that you can use get_range_slice etc. > > There are other approaches however - in some cases it may be possible to > use columns instead of rows there. But you'd still need keys for the > columns. > > A straightforward way of generating unique IDs for your objects is to add > an incrementing ID (managed locally) to the host name of the (client) node > where they were generated. But this is probably not helpful in most cases. > > Mark > -- Shuge Lee | Lee Li | 李蠡
