Once upon a time, Juan Pablo <pablo.localh...@gmail.com> said: > Chris, if you have active-active with multipath: you upgrade one system, > reboot it, check it came active again, then upgrade the other.
Yes, but that's still not how a TrueNAS (and most other low- to mid-range SANs) works, so is not relevant. The TrueNAS only has a single active node talking to the hard drives at a time, because having two nodes talking to the same storage at the same time is a hard problem to solve (typically requires custom hardware with active cache coherency and such). You can (and should) use multipath between servers and a TrueNAS, and that protects against NIC, cable, and switch failures, but does not help with a controller failure/reboot/upgrade. Multipath is also used to provide better bandwidth sharing between links than ethernet LAGs. -- Chris Adams <c...@cmadams.net> _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
