I have an urgent request for a new pv package. I changed a bunch of my script from using dd if=/dev/zero of="dummy" bs="512MB" conv="fdatasync" to dd if="/dev/zero" bs="512MB" conv="fdatasync" | pv | dd of="/dev/sda" bs="512MB" conv="fdatasync" &> /dev/null The first "dd" command line had a forked thread running all 60-120 seconds throwing out the progress made in file creation. The second "dd" was meant to make it more "user friendly" getting rid of the forked thread. The problem is as follows: While the first command... 498+0 records in 498+0 records out 254976000000 bytes (255 GB) copied, 2774.35 s, 91.9 MB/s does nearly 100mb/s The other command with piped pv only does ... 91.3GiB 2:04:22 [12.3MiB/s] 12mb/s Basicly this is 1/10 of the initial speed. When doing some cleanups I do run either command over night to clean up used space (to null the blocks on the harddisk). Normally this process takes aproximately ~1 hours (guessed) while the other took up to 4 hours (~7mb/s average). The problem has been explained here: http://blog.kylemanna.com/linux/2014/04/28/poor-pv-and-splice-performance/ The author has fixed the issue with the version 1.5.3 of pv (which is already at version 1.6.0). If possible. Since this is a real "bottleneck" release a new package for Fedora 20 (and upwards). Thanks
pv-1.6.0-1.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/pv-1.6.0-1.fc20
pv-1.6.0-1.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/pv-1.6.0-1.fc21
pv-1.6.0-1.fc22 has been submitted as an update for Fedora 22. https://admin.fedoraproject.org/updates/pv-1.6.0-1.fc22
Please add karma to the updates!
Package pv-1.6.0-1.fc22: * should fix your issue, * was pushed to the Fedora 22 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing pv-1.6.0-1.fc22' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-7652/pv-1.6.0-1.fc22 then log in and leave karma (feedback).
pv-1.6.0-1.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
pv-1.6.0-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
pv-1.6.0-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.