@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. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1445195 Title: [Hyper-V] Kernel patches for storvsc Status in linux package in Ubuntu: Triaged Status in linux source package in Precise: Triaged Status in linux source package in Trusty: Triaged Status in linux source package in Utopic: Triaged Status in linux source package in Vivid: Triaged Status in linux source package in Wily: Triaged Bug description: Storage driver performance updates for vivid K. Y. Srinivasan (7): scsi: storvsc: Increase the ring buffer size scsi: storvsc: Size the queue depth based on the ringbuffer size scsi: storvsc: Always send on the selected outgoing channel scsi: storvsc: Retrieve information about the capability of the target scsi: storvsc: Fix a bug in copy_from_bounce_buffer() scsi: storvsc: Don't assume that the scatterlist is not chained scsi: storvsc: Set the tablesize based on the information given by the host To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1445195/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
