Hello,
I’m setting up a repository mirror with svnsync and I’m a bit worried
about the revision properties which can change at any time. To have a
perfect mirror, the only way is to call svnsync from post-commit hook
and pre-revprop-change hook.
Starting "svnsync sync" to synchornize a mirror once every x time from a
script (eg: called with crontab) will most probably miss some revprop
changes. And if "svnsync copy-revprops" is called from the
pre-revprop-change hook, then there is no other choice but to call
"svnsync sync" post-commit hook. Otherwise you put your mirror at risk.
For instance:
1. svnsync sync is called from a script once every hour, svnsync
copy-revprops is called from the pre-revprop-change hook:
- svnsync sync is called. Mirror is updated to rev x, one hour of delay.
During that time:
- commit in master of rev x+1
- revprop change to modify svn:log in master for rev x+1
- svnsync copy-revprops called for rev x+1
=> x+1 is not yet commited in the mirror.
2. svnsync copy-revprops is not called from pre-revprop-change
- svnsync sync is called from the hourly script. Mirror is updated to
rev x. One hour of delay.
During that time:
- commit in master of rev x+1
- revprop change to modify svn:log in master for rev x+1
- revprop change to modify svn:log in master for rev x-5
- svnsync sync is called from the hourly script again. Mirror is updated
to rev x+1
=> revprop change for rev x+1 will be populated correctly, not the
revprop change for rev x-5
I though I would share with you my opinion that the only efficient way
to synchronize a mirrored repository is to call "svnsync sync" and
"svnsync copy-revprops" from respectively post-commit hook and
pre-revprop-change hook. Although it might obvious, it is not clearly
stated in the documentation I have read on svnsync.
Your comments are appreciated.
Grégoire.
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Received on Fri Nov 9 12:21:34 2007