Date: Sun, 8 May 2016 13:43:26 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk>, "George Neville-Neil" <gnn@neville-neil.com> Cc: fs@freebsd.org Subject: Re: Fwd: The Morning Paper: NOVA - A log-structured file system for hybrid volatile/non-volatile main memories Message-ID: <07228891.20160508134321@serebryakov.spb.ru> In-Reply-To: <59877.1462639101@critter.freebsd.dk> References: <4188b6afbe9e5d43111fef4d4ae5e599a57.20160506051425@mail23.atl91.mcsv.net> <2BE88161-D83A-4265-9EC3-C2F7F7033E93@neville-neil.com> <59877.1462639101@critter.freebsd.dk>
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[-- Attachment #1 --] Hello Poul-Henning, Saturday, May 7, 2016, 7:38:21 PM, you wrote: > Hybrid "disk with SSD cache" is a transitionary phenomena, it's > probably not going to be relevant in five years, which means > that it is almost already too late to develop a new filesystem > for it: By the time the code is trustworthy, nobody will need > it any more. Do you consider new Intel NVM "3D XPoint" technology? They(tm) promise prices lower than DRAM, but higher than SSD. And same for speed. Looks like, there will be THREE layers of NVM in near future: very large and slow (HDD, iSCSI/FC attached "shelf", things like this, multiterabyte), SSD (in 1-10 terabyte range) and this XPoint in current SSD range. -- Best regards, Lev mailto:lev@FreeBSD.org [-- Attachment #2 --] -----BEGIN PGP MESSAGE----- Version: GnuPG v2.0.22 (MingW32) iQJ8BAEBCgBmBQJXLxhOXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRGOTZEMUNBMEI1RjQzMThCNjc0QjMzMEFF QUIwM0M1OEJGREM0NzhGAAoJEOqwPFi/3EePD3wP/0eOH+QmPVHBsVdqkgX/QIjJ +NAbtv1x2Zs6ErHGnDVjPjwBvlqZCV0eEkXIFEsqXzpGuLirupjVTqpbyLVOKWPZ MxsYzTX9+HxunoDGWeaabnx0UD9Ihc/dQp/N4wU+jB3W4EHCwCQ3A9fOpdksF6WP rusQVdyivBpBwVJJIG3Do2kkWdZMdCemy706VPwAVvwIx8tFK0FaBkZef79k55n1 N4u6Po1FJhzdZVJ3NmaFVGbZUDIzVtOM6GcmKqALmdhTtLZ4Qeo5Z1cRRVBm6lYY DY9E7D1wfb7bfBSypACDNEN3hJaYz4gRc9/GNfYqBU7/stL1XeuYteXp+ZwrC8Tg T7c6Rm6LtQ2Gh5QP+L4Ak8X8BwScr6VGO8GLkqn5FQtltGm+EONbY21vPNn3bREn P+emuXbayk15BoDxdm4BPBwjyrsBVcHzp+UY92J/1cXYHMQeNU6JtptIHX/NazIu Gs87PmX24u2EEvZDH1LReAfOxqOH/dYfusEq/1Zo0C0BLg3H0aBSTQ+aDIG52O4Z T5Gp/OH2DR0ZIuf+0ftyvvZtsFHB/6wZajkwoqMiMJGQeb/B1HbauC/gvnS0P9Mc JxvxMXekgdPzPKxLOl5AKUNqnfwEn6S2LeWeVsADM/YPabJqdWz05cip0diaujBb wKVzYMSkLFGfZoPpKkZS =3HP8 -----END PGP MESSAGE-----
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