On Tue, 2018-01-16 at 15:28 -0800, James Bottomley wrote: > On Tue, 2018-01-16 at 18:23 -0500, Theodore Ts'o wrote: > > On Tue, Jan 16, 2018 at 06:52:40AM -0800, Matthew Wilcox wrote: > > > > > > > > > I see the improvements that Facebook have been making to the nbd > > > driver, and I think that's a wonderful thing. Maybe the outcome of > > > this topic is simply: "Shut up, Matthew, this is good enough". > > > > > > It's clear that there's an appetite for userspace block devices; > > > not for swap devices or the root device, but for accessing data > > > that's stored in that silo over there, and I really don't want to > > > bring that entire mess of CORBA / Go / Rust / whatever into the > > > kernel to get to it, but it would be really handy to present it as > > > a block device. > > > > ... and using iSCSI was too painful and heavyweight. > > From what I've seen a reasonable number of storage over IP cloud > implementations are actually using AoE. The argument goes that the > protocol is about ideal (at least as compared to iSCSI or FCoE) and the > company behind it doesn't seem to want to add any more features that > would bloat it. Has anyone already looked into iSER, SRP or NVMeOF over rdma_rxe over the loopback network driver? I think all three driver stacks support zero-copy receiving, something that is not possible with iSCSI/TCP nor with AoE. Bart.
