The hard links are created after the SSTables have finished writing.
On Thu, Jul 19, 2018 at 9:51 AM David Payne <dav...@cqg.com> wrote: > Hello Cassandra Experts and Committers, > > > > Hopefully this is just a dumb question, but without the skill set to read > the source code, I must ask. > > > > Consider incremental backups are enabled on 2.x or 3.x. As memtables flush > to sstables on disk, hardlinks are created in backups for the column > family. My question is about the sequencing of flush IO and the creation of > these hardlinks. Is the file IO to the flushed sstables completed before > hardlinks are created? In other words, if I see a hardlink, then can I know > for sure that the hardlink is safe to copy? > > I suppose I could figure this out by using lsof, iostat, and pidstat, but > I’d like to avoid this, if possible. > -- Jon Haddad http://www.rustyrazorblade.com twitter: rustyrazorblade
