From owner-freebsd-stable@freebsd.org Sun Mar 3 03:37:12 2019 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 747F81521EBE for ; Sun, 3 Mar 2019 03:37:12 +0000 (UTC) (envelope-from spork@bway.net) Received: from smtp2.bway.net (smtp2.v6.bway.net [IPv6:2607:d300:1::28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CEEC16C4B3 for ; Sun, 3 Mar 2019 03:37:10 +0000 (UTC) (envelope-from spork@bway.net) Received: from gaseousweiner.sporklab.com (pool-72-76-232-210.nwrknj.east.verizon.net [72.76.232.210]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: spork@bway.net) by smtp2.bway.net (Postfix) with ESMTPSA id 52E5895889 for ; Sat, 2 Mar 2019 22:36:55 -0500 (EST) From: Charles Sprickman Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: State of NVMe/NVMe hot-swap Message-Id: <0EE1D1A8-953D-43B6-BB74-7F80540E9A65@bway.net> Date: Sat, 2 Mar 2019 22:36:54 -0500 To: FreeBSD-STABLE Mailing List X-Mailer: Apple Mail (2.3445.102.3) X-Rspamd-Queue-Id: CEEC16C4B3 X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.80 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:d300:1::28/128]; MV_CASE(0.50)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[bway.net:+]; DMARC_POLICY_ALLOW(-0.50)[bway.net,quarantine]; MX_GOOD(-0.01)[mx2.bway.net,mx1.bway.net]; RECEIVED_SPAMHAUS_PBL(0.00)[210.232.76.72.zen.spamhaus.org : 127.0.0.10]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:8059, ipnet:2607:d300::/32, country:US]; IP_SCORE(-0.01)[country: US(-0.07)]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.86)[-0.861,0]; R_DKIM_ALLOW(-0.20)[bway.net:s=mail]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-0.999,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[bway.net.dwl.dnswl.org : 127.0.5.1]; NEURAL_SPAM_SHORT(0.58)[0.585,0]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 03 Mar 2019 03:37:12 -0000 Hi folks, I=E2=80=99ve been looking at mailing list archives, talking to my server = vendor, looking at the official forums and I=E2=80=99m not finding lots = of folks talking about NVMe drives. My forum query on hot-swap got a = total of one response (and not from a NVMe user). I=E2=80=99m looking at new servers and we really tend to use them until = they drop, and it seems not too crazy to think that SATA and SAS SSDs = will start growing scarce in 5-8 years (or at least get more expensive = than NVMe when it=E2=80=99s mainstream). It seems like laptops and even = many desktops are now using NVMe drives in the m.2 format. IOW, it=E2=80=99= s the future. So can anyone comment on using NVMe in production, specifically the = =E2=80=9Cu.2=E2=80=9D format that gives you a nice 2.5=E2=80=9D drive = with hot swap capability? And more specifically, can you comment on how = well (if at all) hot swap works? Really open to any feedback before I = commit to buying a few servers based on NVMe drives. Thanks, Charles=