[Linux-HA] Announcement: New book about Linux-HA Version 2

[Hildebrand, Nils, 232]

Hi Lars, 

> [...]
> - [Quality not important for hardware?]

I think the truth is somewhere in between. If you have a cluster it is
not that important if a node goes down (depending on how available your
services have to be).

So for our cluster-servers we have not the top-level hardware and not
the top-level support.
5 x 12 is enough for the support-level and the machines theirselves are
redundant enough in their vital parts (harddisks in raid-1,
power-support with two lines).


> [no network bonding needed?]

Same thing. Network cards very rarely do crash. And if so - failover,
repair it and failback.

> - [STONITH needed?]

I think more important than stonith is having at least two independent
heartbeat-lines.

> - [time is important - but only for logs]

Why is there a heartbeat-message "time has jumped back - compensating"?

> [...]

Kind regards, Nils