If you are talking about BIND9 atomic replacement on Windows then it does, at least when I wrote that piece of code. It very carefully makes sure it doesn't lose the file.
Danny On 11/12/18 6:21 PM, Mark Andrews wrote: > It really depends on the platform. > > Windows doesn’t support atomic replacement via rename. > > On platforms where atomic replacement via rename is supported it is used. > > Mark > >> On 13 Nov 2018, at 6:39 am, Marcus Frenkel <marcus.fren...@gmail.com> wrote: >> >> Thank you for the quick reply Tony! >> >> Follow-up questions just to be sure: >> 1. The new zone file is renamed in the placed of the old one, only after all >> changes to the new file are written? >> 2. Is the zone file atomically replaced during the renaming process, in a >> sense that there is no window in which the file is empty or non-existent? >> >> I'm running BIND on Debian 9. Based on this Linux man page, the rename >> function should be atomic. I would not imagine that BIND does it in >> different way, like the worst case scenario to first remove the current file >> and then move the new one to the same path. I know I'm too cautious, I'm >> just trying to avoid any chance for rsync to transfer incomplete or empty >> zone file, or maybe delete the file at the destination if it does not exist >> at the source for a short moment. >> >> Marcus >> >> On Mon, Nov 12, 2018 at 7:19 PM Tony Finch <d...@dotat.at> wrote: >> Marcus Frenkel <marcus.fren...@gmail.com> wrote: >>> I need to know how BIND writes to slave zone files after zone has been >>> updated. Does it modify the file in place or it replaces the file with >>> new one at once? >> Changes are written to a journal append-only style. Every so often the >> master file is rewritten to incorporate the contents of the journal; this >> is done by writing to a new file and renaming it in place of the old one. >> >> Tony. >> -- >> f.anthony.n.finch <d...@dotat.at> http://dotat.at/ >> sovereignty rests with the people and authority >> in a democracy derives from the people >> _______________________________________________ >> Please visit https://lists.isc.org/mailman/listinfo/bind-users to >> unsubscribe from this list >> >> bind-users mailing list >> bind-users@lists.isc.org >> https://lists.isc.org/mailman/listinfo/bind-users
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