Bear in mind that LWT will, under certain circumstances fail too. See amazing Chris Batey's talk about it on Cassandra Summit: https://www.youtube.com/watch?v=wcxQM3ZN20c
Carlos Alonso | Software Engineer | @calonso <https://twitter.com/calonso> On 7 November 2016 at 22:22, Justin Cameron <jus...@instaclustr.com> wrote: > You can use lightweight transactions to achieve this. > > Example: > UPDATE item SET customer = 'Joe' WHERE item_id = 2 IF customer = null; > > Keep in mind that lightweight transactions have performance tradeoffs ( > http://www.datastax.com/dev/blog/lightweight-transactions-in-cassandra-2-0 > ) > > > On Mon, 7 Nov 2016 at 11:52 S Ahmed <sahmed1...@gmail.com> wrote: > >> Say I have 100 products in inventory, instead of having a counter I want >> to create 100 rows per inventory item. >> >> When someone purchases a product, how can I correctly assign that >> customer a product from inventory without having any race conditions etc? >> >> Thanks. >> > -- > > Justin Cameron > > Senior Software Engineer | Instaclustr > > > > > This email has been sent on behalf of Instaclustr Pty Ltd (Australia) and > Instaclustr Inc (USA). > > This email and any attachments may contain confidential and legally > privileged information. If you are not the intended recipient, do not copy > or disclose its content, but please reply to this email immediately and > highlight the error to the sender and then immediately delete the message. > >
