Because the Red Hat Cluster do fencing with Power off we have long-time ago a fencing Problem. Means if we fence one Member and this one has to write a dump we have only arround 120s to write his dump to the swap file, then he will be fenced with power-off. during this time the Cluster will be freezed because we don’t no the exact status from the member.
To reduce the freeze time, we need a extrem fast local swap storage. So I saw from fusionio.com that they sell a SSD internal disk with 600mb/s radom write ( http://www.fusionio.com/PDFs/Fusion specsheet_v16.pdf )! Thats extrem fast, so I thinking to buy one. But that is one drawback –> price are also very high around 30$/GB and I’m not sure if its works with diskdump.