Public bug reported: Strange write performance issue after upgrading from ubuntu server x64 14.04 to 15.10.
Hdd's write speed is near 90-100Mb/s: # dd if=/dev/zero bs=1M count=100000 of=/dev/sdb Result: 102 MB/s Checking write speed for simple LV: # lvcreate -L 100g vghost -n lv1 # dd if=/dev/zero bs=1M count=100000 of=/dev/vghost/lv1 Result: 32.5 MB/s And for LV + snapshot: # lvcreate -L 100g -s vghost/lv1 -n snap1 # dd if=/dev/zero bs=1M count=100000 of=/dev/vghost/snap1 Result: 19.7 MB/s Any ideas how to fix that? ** Affects: lvm2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lvm2 in Ubuntu. https://bugs.launchpad.net/bugs/1522925 Title: lvm snapshot write performance issue Status in lvm2 package in Ubuntu: New Bug description: Strange write performance issue after upgrading from ubuntu server x64 14.04 to 15.10. Hdd's write speed is near 90-100Mb/s: # dd if=/dev/zero bs=1M count=100000 of=/dev/sdb Result: 102 MB/s Checking write speed for simple LV: # lvcreate -L 100g vghost -n lv1 # dd if=/dev/zero bs=1M count=100000 of=/dev/vghost/lv1 Result: 32.5 MB/s And for LV + snapshot: # lvcreate -L 100g -s vghost/lv1 -n snap1 # dd if=/dev/zero bs=1M count=100000 of=/dev/vghost/snap1 Result: 19.7 MB/s Any ideas how to fix that? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1522925/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp