Hi, On Tue, Feb 12, 2002 at 05:21:45PM -0800, Andrew Morton wrote: > "Bryan J. Smith" wrote: > > > > I've seen this come up on occassion, but every NAS OEM that uses > > NVRAM I've ever talked to over the last 18 months won't tell me > > anything about their equipment nor their suppliers. > > A fair bunch of people did a fair bunch of testing of this last year. > Bottom line: RAM-based journals don't speed ext3 up. Well, they did, but in general it was no better than adding an external disk-based journal. However, for some specific workloads, there _is_ a big difference --- synchronous NFS servers, for example, where latency is a big factor. I've got an NVRAM board on order at the moment so I hope to have numbers of my own quite soon. Cheers, Stephen
