From nobody Wed Apr 06 12:56:53 2022 X-Original-To: freebsd-fs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 496061A9CC29; Wed, 6 Apr 2022 12:57:08 +0000 (UTC) (envelope-from rainer@ultra-secure.de) Received: from connect.ultra-secure.de (connect.ultra-secure.de [88.198.71.201]) by mx1.freebsd.org (Postfix) with ESMTP id 4KYPfq0Vp5z54ZK; Wed, 6 Apr 2022 12:57:06 +0000 (UTC) (envelope-from rainer@ultra-secure.de) Received: (Haraka outbound); Wed, 06 Apr 2022 14:54:32 +0200 Received-SPF: SoftFail (connect.ultra-secure.de: domain of ultra-secure.de does not designate 217.71.83.52 as permitted sender) receiver=connect.ultra-secure.de; identity=mailfrom; client-ip=217.71.83.52; helo=smtpclient.apple; envelope-from= Received-SPF: None (connect.ultra-secure.de: domain of smtpclient.apple does not designate 217.71.83.52 as permitted sender) receiver=connect.ultra-secure.de; identity=helo; client-ip=217.71.83.52; helo=smtpclient.apple; envelope-from= Received: from smtpclient.apple (217-071-083-052.ip-tech.ch [217.71.83.52]) by connect.ultra-secure.de (Haraka/2.6.2-toaster) with ESMTPSA id 6C816542-0484-4947-801C-2EA8A9DBC4A1.1 envelope-from (authenticated bits=0) (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 verify=NO); Wed, 06 Apr 2022 14:54:29 +0200 From: Rainer Duffner Message-Id: <665236B1-8F61-4B0E-BD9B-7B501B8BD617@ultra-secure.de> Content-Type: multipart/alternative; boundary="Apple-Mail=_BC042E58-8575-4525-A55E-47AA4EF4E371" List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.80.82.1.1\)) Subject: Re: Desperate with 870 QVO and ZFS Date: Wed, 6 Apr 2022 14:56:53 +0200 In-Reply-To: <4e98275152e23141eae40dbe7ba5571f@ramattack.net> Cc: freebsd-fs@freebsd.org, freebsd-hackers@freebsd.org, freebsd-performance@freebsd.org To: egoitz@ramattack.net References: <4e98275152e23141eae40dbe7ba5571f@ramattack.net> X-Mailer: Apple Mail (2.3696.80.82.1.1) X-Haraka-GeoIP: EU, CH, 451km X-Haraka-ASN: 24951 X-Haraka-GeoIP-Received: 217.71.83.52:CH X-Haraka-ASN: 24951 217.71.80.0/20 X-Haraka-ASN-CYMRU: asn=24951 net=217.71.80.0/20 country=CH assignor=ripencc date=2003-08-07 X-Haraka-FCrDNS: 217-071-083-052.ip-tech.ch X-Haraka-p0f: os="Mac OS X " link_type="DSL" distance=16 total_conn=4 shared_ip=N X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on spamassassin X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=ALL_TRUSTED,BAYES_00, HTML_MESSAGE,SPF_HELO_NONE,SPF_SOFTFAIL,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.1 X-Haraka-Karma: score: 6, good: 21448, bad: 624, connections: 23952, history: 20824, asn_score: 292, asn_connections: 310, asn_good: 292, asn_bad: 0, pass:asn, asn_all_good, relaying X-Rspamd-Queue-Id: 4KYPfq0Vp5z54ZK X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of rainer@ultra-secure.de designates 88.198.71.201 as permitted sender) smtp.mailfrom=rainer@ultra-secure.de X-Spamd-Result: default: False [-2.41 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.92)[-0.917]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[ultra-secure.de]; NEURAL_HAM_LONG(-0.99)[-0.990]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_HAM_SHORT(-0.80)[-0.798]; MLMMJ_DEST(0.00)[freebsd-fs,freebsd-hackers,freebsd-performance]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:24940, ipnet:88.198.0.0/16, country:DE]; RCVD_COUNT_TWO(0.00)[2]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N --Apple-Mail=_BC042E58-8575-4525-A55E-47AA4EF4E371 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > Am 06.04.2022 um 13:15 schrieb egoitz@ramattack.net: >=20 > I don't really know if, perhaps the QVO technology could be the guilty = here.... because... they say are desktop computers disks... but later. Yeah, they are. Most likely, they don=E2=80=99t have some sort of super-cap. A power-failure might totally toast the filesystem. These disks are - IMO - designed to accelerate read-operations. Their = sustained write-performance is usually mediocre, at best. They might work well for small data-sets - because that is really = written to some cache and the firmware just claims it=E2=80=99s = =E2=80=9Ewritten=E2=80=9C, but once the data-set becomes big enough, = they are about as fast as a fast SATA-disk. https://www.tomshardware.com/reviews/samsung-970-evo-plus-ssd,5608.html --Apple-Mail=_BC042E58-8575-4525-A55E-47AA4EF4E371 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8

Am 06.04.2022 um 13:15 schrieb egoitz@ramattack.net:

I don't really know if, perhaps the QVO technology could be = the guilty here.... because... they say are desktop computers disks... = but later.


Yeah, they = are.

Most = likely, they don=E2=80=99t have some sort of super-cap.

A power-failure might = totally toast the filesystem.

These disks are - IMO -  designed = to accelerate read-operations. Their sustained write-performance is = usually mediocre, at best.

They might work well for small data-sets - because that is = really written to some cache and the firmware just claims it=E2=80=99s = =E2=80=9Ewritten=E2=80=9C, but once the data-set becomes big enough, = they are about as fast as a fast SATA-disk.

https://www.tomshardware.com/reviews/samsung-970-evo-plus-ssd,5= 608.html


= --Apple-Mail=_BC042E58-8575-4525-A55E-47AA4EF4E371--