On Mon, Jan 18, 2016 at 1:44 AM, David Fetter <da...@fetter.org> wrote: > On Sun, Jan 17, 2016 at 11:13:33PM -0500, Bruce Momjian wrote: >> On Thu, Jan 7, 2016 at 02:30:06PM -0600, Jim Nasby wrote: >> > https://queue.acm.org/detail.cfm?id=2874238 discusses how modern >> > Storage Class Memory (SCM), such as PCIe SSD and NVDIMMs are >> > completely upending every assumption made about storage. To put >> > this in perspective, you can now see storage latency that is >> > practically on-par with things like lock acquisition. >> >> How is this different from Fusion I/O devices, which have been >> around for years? > > Price. > > As these things come down in price, it'll start being more and more > reasonable to treat rotating media as exotic.
<rant>People keep predicting the death of spinning media, but I think it's not happening to anywhere near as fast as that people think. Yes, I'm writing this on a laptop with an SSD, and my personal laptop also has an SSD, but their immediate predecessors did not, and these are fairly expensive laptops. And most customers I talk to are still using spinning disks. Meanwhile, main memory is getting so large that even pretty significant databases can be entirely RAM-cached. So I tend to think that this is a lot less exciting than people who are not me seem to think.</rant> Now that having been said, I will not complain if vast quantities of low-latency, high-bandwidth, non-volatile storage become available at bargain prices. And it very well may - eventually. But I'm not quite ready to break out the ticker tape just yet. I think it will be a while. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers