On 13 August 2012 07:55, Harsh J <[email protected]> wrote: >
Note that with 2.1.0 (upcoming) and above releases of HDFS, we offer a > working hsync() API that allows you to write files with guarantee that > it has been written to the disk (like the fsync() *nix call). A guarantee that the OS thinks it's been written to HDD. For anyone using Hadoop or any other program (e.g MySQL) in a virtualized environment , even when the OS thinks it has flushed a virtual disk -know that you may have set some VM params to say "when we said "flush to disk" we meant it": https://forums.virtualbox.org/viewtopic.php?t=13661
