Date: Wed, 14 Feb 2007 11:17:53 +0100 From: Andrea Venturoli <ml.diespammer@netfence.it> To: Olaf Greve <o.greve@axis.nl> Cc: freebsd-questions@freebsd.org Subject: Re: Good synchronisation strategies (especially for the users and groups)? Message-ID: <45D2E1D1.7070302@netfence.it> In-Reply-To: <45D2DC08.9010209@axis.nl> References: <45D2DC08.9010209@axis.nl>
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Olaf Greve wrote: > However, I seem to recall (not sure, anymore though) having heard and/or > read (here, perhaps?) that there are better ways to synchronise than > using rsync... I guess you might have heard of ggated (8) & Co. This is quite different from rsync and might or might not be suited to your needs and configuration. It's more like ghosting in some way and you'll need a dedicated partition for our data. Also, AFAIK, you should not mount your data unless you know the other server failed or both are mounting this data read-only. I never tested this myself, anyway. What is best for you depends much on how you access your data. Is it read-only or read/write? > Also, I'd like to be able to > (safely!) automatically synchronise users and groups that I may > add/change/delete on the live server. I'm using OpenLDAP and nss_ldap for that. Works very well, in that syncronization is virtually immediate. There are some caveats and this will introduce another possible point of failure, though. > Regarding the data, the machine is mainly used as a webserver, running > PHP, MySQL and some other things. WRT webserver data, it's just plain files, so it falls in the previous case. You should look for application level replication for databases. I don't think PHP matters, but I can't really tell without knowing what you really have. Same goes for "some other things". > 1) Is rsync a good way to go, or are there better ways to do this? See above, might be, might be not. > 2) Regarding synching of user and group data: are there special ways to > do this (i.e. including automatic creation of homedirectories etc.), or > does one simply manually have to sync the users and groups files (and > the user directories)? See above for user and groups; home directories again fall into the filesystem part. bye av.
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