On 22/06/16 02:31 PM, John R Pierce wrote: > On 6/22/2016 11:06 AM, Digimer wrote: >> I know this goes against the >> grain of sysadmins to yank power, but in an HA setup, nodes should be >> disposable and replaceable. The nodes are not important, the hosted >> services are. > > of course, the really tricky problem is implementing an ISCSI storage > infrastructure thats fully redundant and has no single point of > failure. this requires the redundant storage controllers to have > shared write-back cache, fully redundant networking, etc. The > fiberchannel SAN folks had all this down pat 20 years ago, but at an > astronomical price point. > > The more complex this stuff gets, the more points of potential failure > you introduce. Or use DRBD. That's what we do for our shared storage backing our VMs and shared FS. Works like a charm. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education?