On Tue, May 27, 2008 at 02:22:31PM -0700, Amar S. Tumballi wrote: > > > > To answer your original question, files within an AFR are healed from one > > node to the other when the file is accessed (actually read) through the AFR > > and one node is found to have more recent data than others. > > > > Just for understanding, this should be "AFR self-heal done when files are > accessed (actually open()'d)", it may not be even a read call. if you have > a tool, which just does 'open()/close()' on a file, it gets synced. What could a half-automated self-heal procedure look like? Since self-heal would also have to handle file deletions during the absence of the brick to be healed, or there may have been a split-brain situation in between, this doesn't seem too trivial to me. Otherwise, I could imagine a find directory -type f | xargs -n1 -i% dd if=% of=/dev/null count=1 run on the right brick... (even count=0 would do -- according to strace, dd would perform the full set of open(), llseek(), and close() -- thus it should do the trick) Steffen -- Steffen Grunewald * MPI Grav.Phys.(AEI) * Am Mühlenberg 1, D-14476 Potsdam Cluster Admin * http://pandora.aei.mpg.de/merlin/ * http://www.aei.mpg.de/ * e-mail: steffen.grunewald(*)aei.mpg.de * +49-331-567-{fon:7233,fax:7298} No Word/PPT mails - http://www.gnu.org/philosophy/no-word-attachments.html
