| From: | Stephen Frost <sfrost(at)snowman(dot)net> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com> |
| Subject: | Re: pg_upgrade and rsync |
| Date: | 2015-01-28 13:25:45 |
| Message-ID: | 20150128132545.GS3854@tamriel.snowman.net |
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| Lists: | pgsql-hackers |
* Bruce Momjian (bruce(at)momjian(dot)us) wrote:
> Interesting problem, but doesn't rsync use sub-second accuracy?
No. Simple test will show:
touch xx/aa ; rsync -avv xx yy ; sleep 0.5 ; touch xx/aa ; rsync -avv xx yy
Run that a few times and you'll see it report "xx/aa is uptodate"
sometimes, depending on when exactly where the sleep falls during the
second.
Thanks,
Stephen
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