> * fdatasync is issued only once at the end of all writes when conv=fdatasync > * for some strange reason no fsync or fdatasync is issued at all when > conv=sync That's because of my typo. I meant oflag=sync, not conv=sync. Sorry. > So, using conv=fdatasync in the test cannot prevent write-parallelism induced > by write-behind. Parallelism would've been prevented only if dd had issued > fdatasync after each write or opened the file with O_SYNC. See above. I just checked with strace, and oflag=sync does cause the output file to be opened with O_SYNC. _______________________________________________ Gluster-devel mailing list Gluster-devel@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-devel
