Date: Wed, 7 Sep 2016 21:55:03 +0530 From: Amitabh Kant <amitabhkant@gmail.com> To: =?UTF-8?Q?Sol=C3=A8ne_Rapenne?= <solene@perso.pw> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: NFS or rsync for sharing files between FreeBSD servers? Message-ID: <CAPTAQBK54jCTJ2en=w12dPPCQNw0uSX-7LKg6P7G61Fr9MMaTg@mail.gmail.com> In-Reply-To: <7420247e8b1cd07eda9540ea28c9d90b@mail.zplay.eu> References: <CAPTAQBJD1qZ9kZSrXOOuKLHC6J_O3jBPiH4Yqav3qfQp8V7wtA@mail.gmail.com> <7420247e8b1cd07eda9540ea28c9d90b@mail.zplay.eu>
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On Wed, Sep 7, 2016 at 9:48 PM, Sol=C3=A8ne Rapenne <solene@perso.pw> wrote= : > Le 2016-09-07 18:09, Amitabh Kant a =C3=A9crit : > >> We need to share a number of directories between 3 servers running 9.3 . >> Most of these directories contain php/html/js/images files which do not >> change frequently. >> >> We need to keep the directories in sync on all three servers. Currently, >> we >> run a rsync command every time there is a change in one of the >> files/directories. Sometimes it does happen that we forget to run the >> rsync >> script making one of the servers return old versions. >> >> That is where we are planning to introduce a nfs_server on one of the >> servers, while the other two will be nfs_clients accessing the files >> through a shared directory. I understand that it would present a single >> point of failure, but in terms of disk access speed, will it make a huge >> difference further impacting the web servers running on the nfs_client >> servers ? The servers are connected to each other over gigabit lines, an= d >> the files are themselves not greater than 20-30 kb on an average, with >> some >> of the larger image files somewhere around 4-5 MB. >> >> >> Amitabh >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to "freebsd-questions-unsubscribe >> @freebsd.org" >> > > Hello, > > When does the files changes ? Is it the server changing the files or is i= t > when your team push changes ? If the changes come from your team, just > change your deployment script to push it to the 3 servers. I would > recommend rsync because if it doesn't change a lot with a NFS you will ad= d > a SPOF (single point of failure) and overhead for no benefit. > > Kind regards > As of now, files are only changed when the team pushes the change. But going ahead, we are looking at a scenario where the files auto-generated through script on one server would be required on other servers too. Using rsync while running a web server process doesn't seem ok to me. The other idea is to use the DB server to store the auto-generated files, and fetch on any of the servers are required. While this is a feasible idea technically, this might also bloat the DB. So if NFS overhead is not too huge, I can take a look at it as an option. Amitabh
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