http://en.wikipedia.org/wiki/Compare-and-swap
I believe C* uses Paxos for CAS but not completely sure? -- Francisco Andrades Grassi www.bigjocker.com @bigjocker On Jul 1, 2013, at 1:49 PM, "Hiller, Dean" <dean.hil...@nrel.gov> wrote: > What does CAS stand for? And is that the row locking feature like hbase's > setAndReadWinner that you give the previous val and next val and your next > val is returned if you won otherwise the current result is returned and > you know some other node won? > > Thanks, > Dean > > On 7/1/13 12:09 PM, "Blair Zajac" <bl...@orcaware.com> wrote: > >> Thanks! >> >> On 7/1/13 1:41 AM, Sylvain Lebresne wrote: >>> You're right, there is currently no way to do this since 1) insert >>> can't have a >>> IF currently and 2) update can't update such table. >>> >>> We'll fix that: https://issues.apache.org/jira/browse/CASSANDRA-5715 >>> >>> -- >>> Sylvain >>> >>> >>> On Sat, Jun 29, 2013 at 9:51 PM, Blair Zajac <bl...@orcaware.com >>> <mailto:bl...@orcaware.com>> wrote: >>> >>> On 6/24/13 8:23 PM, Blair Zajac wrote: >>> >>> How does one do an atomic update in a column family with a >>> single column? >>> >>> I have a this CF >>> >>> CREATE TABLE schema_migrations ( >>> version TEXT PRIMARY KEY, >>> ) WITH COMPACTION = {'class': 'LeveledCompactionStrategy'}; >>> >>> >>> Anyone? Should I raise this on the developer mailing list or open >>> a ticket? >>> >>> Blair >
