{"action":"created","issue":{"url":"https://api.github.com/repos/zfsonlinux/zfs/issues/7303","repository_url":"https://api.github.com/repos/zfsonlinux/zfs","labels_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/7303/labels{/name}","comments_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/7303/comments","events_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/7303/events","html_url":"https://github.com/zfsonlinux/zfs/issues/7303","id":305624106,"node_id":"MDU6SXNzdWUzMDU2MjQxMDY=","number":7303,"title":"zfs diff no result despite changes to fs being made","user":{"login":"devZer0","id":3506105,"node_id":"MDQ6VXNlcjM1MDYxMDU=","avatar_url":"https://avatars1.githubusercontent.com/u/3506105?v=4","gravatar_id":"","url":"https://api.github.com/users/devZer0","html_url":"https://github.com/devZer0","followers_url":"https://api.github.com/users/devZer0/followers","following_url":"https://api.github.com/users/devZer0/following{/other_user}","gists_url":"https://api.github.com/users/devZer0/gists{/gist_id}","starred_url":"https://api.github.com/users/devZer0/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/devZer0/subscriptions","organizations_url":"https://api.github.com/users/devZer0/orgs","repos_url":"https://api.github.com/users/devZer0/repos","events_url":"https://api.github.com/users/devZer0/events{/privacy}","received_events_url":"https://api.github.com/users/devZer0/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-03-15T16:22:55Z","updated_at":"2018-08-19T09:00:27Z","closed_at":null,"author_association":"NONE","body":"Distribution Name       | CentOS\r\nDistribution Version    |  7.4.1708\r\nLinux Kernel                 |  3.10.0-693.17.1.el7.x86_64\r\nArchitecture                 | x86_64\r\nZFS Version                  |  0.7.6-1\r\nSPL Version                  |  0.7.6-1\r\n\r\n### Describe the problem you're observing\r\ni'm seeing that there are changes made to the filesystem (as you can see in snapshot \"written\") statistics, but i can't see which changes being made to that dataset.  as far as i know, nothing is writing to that dataset between the two snapshots.\r\n\r\nfor my curiousity, the number \"196416\" is occuring several times on several other datasets, too - where i would have expected \"0\" , as you can see from the snapshots before 11:01hrs\r\n\r\ncould one explain why i don't see a diff ?\r\ncan files change in a way that diff won't show it ? \r\ncan zfs datasets change on blocklevel without files/dirs being changed/written to?\r\n\r\n### Describe how to reproduce the problem\r\n\r\nzfs list -t all -p -o name,written -r timemachinepool/tm8\r\nNAME                                                           WRITTEN\r\ntimemachinepool/tm8                                                  0\r\ntimemachinepool/tm8@zfs-auto-snap_daily-2018-03-13-0250   131069501640\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-1601             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-1701             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-1801             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-1901        212784\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-2001             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-2101        212784\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-2201        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-13-2301        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0001             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0101             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0201             0\r\ntimemachinepool/tm8@zfs-auto-snap_daily-2018-03-14-0225              0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0301             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0401             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0501             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0601             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0701    1288169784\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0801    1937324664\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-0901     450602856\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1001     216565008\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1101     197741808\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1201     190016112\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1301     201686496\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1401     208070016\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1501     201473712\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1601             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1701             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1801        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-1901             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-2001             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-2101             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-2201             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-14-2301             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0001             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0101             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0201             0\r\ntimemachinepool/tm8@zfs-auto-snap_daily-2018-03-15-0215              0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0301             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0401             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0501             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0601             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0701             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0801             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-0901             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1001             0\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1101        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1201        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1301        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1401        196416\r\ntimemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1501        196416\r\n\r\nzfs diff -FHt timemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1001 timemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1101\r\n\r\nzfs diff -FHt timemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1101 timemachinepool/tm8@zfs-auto-snap_hourly-2018-03-15-1201\r\n\r\nzfs list -t all -p -o name,written -r timemachinepool|grep 196416|wc -l\r\n35\r\n"},"comment":{"url":"https://api.github.com/repos/zfsonlinux/zfs/issues/comments/414113896","html_url":"https://github.com/zfsonlinux/zfs/issues/7303#issuecomment-414113896","issue_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/7303","id":414113896,"node_id":"MDEyOklzc3VlQ29tbWVudDQxNDExMzg5Ng==","user":{"login":"loli10K","id":4585738,"node_id":"MDQ6VXNlcjQ1ODU3Mzg=","avatar_url":"https://avatars0.githubusercontent.com/u/4585738?v=4","gravatar_id":"","url":"https://api.github.com/users/loli10K","html_url":"https://github.com/loli10K","followers_url":"https://api.github.com/users/loli10K/followers","following_url":"https://api.github.com/users/loli10K/following{/other_user}","gists_url":"https://api.github.com/users/loli10K/gists{/gist_id}","starred_url":"https://api.github.com/users/loli10K/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/loli10K/subscriptions","organizations_url":"https://api.github.com/users/loli10K/orgs","repos_url":"https://api.github.com/users/loli10K/repos","events_url":"https://api.github.com/users/loli10K/events{/privacy}","received_events_url":"https://api.github.com/users/loli10K/received_events","type":"User","site_admin":false},"created_at":"2018-08-19T09:00:27Z","updated_at":"2018-08-19T09:00:27Z","author_association":"CONTRIBUTOR","body":"> could one explain why i don't see a diff ?\r\n> can files change in a way that diff won't show it ?\r\n> can zfs datasets change on blocklevel without files/dirs being changed/written to?\r\n\r\nI believe this is explained by my comment above; with no feedback in months i think we can close this."}}
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