> Any idea why Glibc's posix_fallocate makes any difference? > > Doesn't it simply write a lot of zeros? In that case, why doesn't > rsync writing lots of data sequentially result in the same number of > extents?
The destination server had a lot of other processes running at the same time. I suspect this concurrency is causing the additional extents since many processes writing to the same disk array. I thought only 1235 extents without posix_fallocate was pretty good. Under cygwin and NTFS, an equivalent file was generating around 25000 extents. Rob -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
