Comment 41 for bug 1445195

@jrp I have tried to discover if there were any differences between the backup that failed and the other ones. I noticed this one thing. Before or during backup (cannot recall exactly atm) a 'composer install' process was running. Composer is a php package manager. It downloads and deploys many small files on the filesystem (download of multiple tar.gz files that are being unpacked). This machine normally does nothing more than serving http requests. It is the opposite of a high-load server. So the composer process is an outlier compared to the usual operations. Maybe this helps to reproduce the io pattern.

Thanks anyway for the work already. It makes a difference for sure. Hope there will be a final solution anytime soon.