W dniu 10-04-05 22:08, Tonix (Antonio Nati) pisze:
Maciej Jan Broniarz ha scritto:
W dniu 10-04-05 17:45, Mike Jakubik pisze:
>
Just to use exact words, fault toulerancy is not possible with any
FreeBSD/Linux O.S.
F.T. means outage can occur in every moment, but all current operation
will be always completed by other equipments; so there will not be
interrupted/lost operations.
Hmm. Thanks for the tip. Which *NIX os can be used to build an FT
solution then? Solaris? AIX? HP-UX?
Carp is fine for HA is you have always both db and file storage always
available.
For DB you can use MySQL replica, cross-replicating local MySQL data
among all servers. Each server will keep its own copy, always up to date
with other servers.
This will make all DB data always available, except data recorded in the
last milliseconds.
About file storage, you must have an external reliable NFS server.
So, to be redundant one should run 2 x web servers + 2 x storage +2 x
mysql. Sounds like fun, but also like a lot of work. So how do the web
hosting prividers manage to use FreeBSD for theirs solution?
I am curious do they have a cluster/reudndant solution for every part of
the system, or they just accept thet something will fail at some time.
Best regards,
mjb
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