-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Robert Hajime Lanning wrote: > On Tue, 2009-01-13 at 17:03 +0800, Atom Powers wrote: >> What are the other strategies for making a service highly available? > > Have you looked into LVS? > http://www.linuxvirtualserver.org/ > > Combine that with Linux Hearbeat (http://www.linux-ha.org/) and you get > a full load balanced HA cluster.
I second the LVS recommendation. Its a great layer-4 load-balancing function. Code was merged into the Linux kernel several years back; very stable IME/IMHO. There are quote a few projects (Ultra Monkey, keepalived, etc) which have wrappers for LVS functions to test service viability for HA. Great solution for those who cannot afford turnkey appliances (F5, Foundry, Netscaler, etc) or prefer the DIY approach. There is also the CARP project in *BSD land. Unfortunately, the UCARP project to bring this to Linux has been stalled off-and-on for years. YMMV now. Regarding LDAP implementation, why not segregate if you can spare the kit/admin cycles? Point service lookups at slaves replicated from master(s) which only facilitate writes? Thats an oversimplification of your site, Im sure, but the gist is there. Hope this helps. Cheers. - -- Nick Silkey -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin) iEYEARECAAYFAklstkwACgkQrDQjhjXrMeJ/rwCfbdPozEn/8oXkBjubIYlNrKDK GCwAn0noT93wpFKyB7X4rpqL6MNBWGo1 =+XF4 -----END PGP SIGNATURE----- _______________________________________________ Tech mailing list Tech@lopsa.org http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
