> First of all, you (should) have redundant FC-switches (mulipathing). > Then, your storage has (should have) multiple controllers. Eg. HP EVA > series. > If that isn't enough, there are solution to mirror the storage at the > hardware-level. > Usually, this is in the > "if-you-have-to-ask-it's-probably-too-expensive-for-you-anyway"-pricerange > and thus only used where the (lack of) downtime is worth the investment. oops, money is the problem :-P i work for a government institution ..... in Brazil :-P > IMO, hardware is very reliable these days (if you choose wisely). Things > like DRBD seem (to me) only useful in very special cases - and I would > fear that DRBD might create more problems than it solves. > In your special case (email), if you can't afford a SAN, get a used > NetApp and store the maildirs there (qmail-style maildirs). Then > NFS-mount them on the "cluster-nodes". > The NetApp is reliable enough for these scenarios and depending on the > exact model, already contains a lot of redundancy in itself. i already thought about this ..... its a possibility .... thanks for the answer ... cheers Nick -- Nicholas Anderson Administrador de Sistemas Unix LPIC-1 Certified Rede Fiocruz e-mail: nicholas@xxxxxxxxxx -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
