The Priam code is looking for the <keyspace>/<columnfamily>/backups directory created by cassandra during incremental backups. If it finds it the files are uploaded to S3.
It's taking the built in incremental backups off node. (AFAIK) Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 15/08/2012, at 8:16 AM, Yang <teddyyyy...@gmail.com> wrote: > in the initial incremental backup implementation, > the hardlinking to the backup dir was in the CFS.addSSTable() code, so it's > part of the Cassandra code. > > I looked at Priam, > https://github.com/Netflix/Priam/blob/master/priam/src/main/java/com/netflix/priam/backup/IncrementalBackup.java > > this code pretty much does the same thing as the original addSSTable() > incremental backup . > so the Priam backup code operates outside of Cassandra write path? > any insight into why this approach was chosen instead of using the > incremental backup provided by Cassandra? > > thanks > Yang
