A way to do atomic writes
A way to do atomic writes
[Kernel] Posted May 28, 2019 22:53 UTC (Tue) by jake
Finding a way for applications to do atomic writes to files, so that either the old or new data is present after a crash and not a combination of the two, was the topic of a session led by Christoph Hellwig at the 2019 Linux Storage, Filesystem, and Memory-Management Summit (LSFMM). Application developers hate the fact that when they update files in place, a crash can leave them with old or new data—or sometimes a combination of both. He discussed some implementation ideas that he has for atomic writes for XFS and wanted to see what the other filesystem developers thought about it.