A slave PFS doesn't even have a PFS root inode till it's once sync'd with a master. Until then one can't really do anything with it (can't even cd), but no document explains this.
http://lists.dragonflybsd.org/pipermail/users/2015-April/311953.html 2017-04-08 20:59 GMT+03:00 Matthew Dillon <[email protected]>: > 0x0000000000000000 is not a valid transaction id. Not sure how it wound up > in the snapshot list but that slave has not been synchronized from a master > yet and until it is there is no real snapshot. > > -Matt > > On Sat, Apr 8, 2017 at 9:55 AM, <[email protected]> wrote: >> >> Hi, >> >> I have other information.. the behavior started to be 100% reproducible on >> my machine: every time I added a file I found it in the past snapshot. But >> it appeared after a delay, ranging from 1 to about 20 seconds! >> >> % hammer snapls /home/attic/ >> Snapshots on /home/attic/ PFS#2 >> Transaction ID Timestamp Note >> 0x0000000000000000 2017-04-06 09:57:34 CEST - >> >> % pwd >> /home/attic >> >> % touch a_new_file >> % ls .@@0x0000000000000000 >> disk_stats.txt >> >> The file isn't in the snapshot yet. But if a i keep repeating the ls >> command after a few seconds I find it: >> >> % ls .@@0x0000000000000000 >> a_new_file disk_stats.txt >> >> >> Then I decided to run hammer cleanup: >> >> # hammer cleanup >> [... Output snipped ...] >> cleanup /home/attic - handle PFS#2 using /var/hammer/home/attic >> snapshots - run >> prune - run >> rebalance - run.. >> reblock - run.... >> recopy - skip >> [... Output snipped ...] >> >> Now I have a new snapshot but the old snapshot is gone: >> >> % hammer snapls /home/attic/ >> Snapshots on /home/attic/ PFS#2 >> Transaction ID Timestamp Note >> 0x00000001186c2200 2017-04-08 18:25:50 CEST - >> >> This new snapshot doesn't exhibit the behavior described above: I can add >> and delete files in the main directory and the snapshot doesn't change. >> >> Sadly, now I have no access to the old snapshot to further diagnose the >> problem. I didn't think hammer cleanup would delete a snapshot from two days >> ago. >> >> >> Kind regards, >> Andrea >> >> >> >
