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[54.198.91.99]) by smtp.gmail.com with ESMTPSA id e11sm1136656qkg.134.2019.09.24.09.59.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 24 Sep 2019 09:59:49 -0700 (PDT) Date: Tue, 24 Sep 2019 16:59:48 +0000 To: kpn@neutralgood.org, john@spikefishsolutions.com From: Richard Mackerras Cc: freebsd-stable@freebsd.org Subject: Re: Question about bottle neck in storage Message-ID: X-Priority: 3 X-Mailer: Hop In-Reply-To: <20190924163033.GA98251@neutralgood.org> References: <20190924163033.GA98251@neutralgood.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: 46d6qq3P33z3C8R X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=T+4if27r; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of mack63richard@gmail.com designates 2607:f8b0:4864:20::741 as permitted sender) smtp.mailfrom=mack63richard@gmail.com X-Spamd-Result: default: False [-1.84 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; XM_UA_NO_VERSION(0.01)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; MIME_BASE64_TEXT(0.10)[]; HAS_X_PRIO_THREE(0.00)[3]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; AUTOGEN_PHP_SPAMMY(1.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; HAS_PHPMAILER_SIG(0.00)[]; IP_SCORE_FREEMAIL(0.00)[]; MANY_INVISIBLE_PARTS(0.05)[1]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[1.4.7.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(0.00)[ip: (2.36), ipnet: 2607:f8b0::/32(-2.63), asn: 15169(-2.20), country: US(-0.05)]; RCVD_TLS_ALL(0.00)[] Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 X-Content-Filtered-By: Mailman/MimeDel 2.1.29 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: Tue, 24 Sep 2019 16:59:51 -0000 SeKAmWQgYmUgaW50ZXJlc3RlZCB0byBrbm93IHdoYXQgdGhlIGFjdHVhbCB0aHJvdWdocHV0IGlz IHlvdSBhcmUgZ2V0dGluZy4KQXJlIHRoZSBkaXNrcyBTQVRBIDcyMDBSUE0/IFdoYXQgc3BlZWQg aXMgdGhlIGRpc2sgaW50ZXJmYWNlPwpEbyB5b3UgaGF2ZSBqdXN0IDIgZGlza3Mgb3IgbW9yZT8K ClJpY2hhcmQKCltSaWNoYXJkIE1hY2tlcnJhcyAtIENoYXQgQCBTcGlrZV0oaHR0cHM6Ly93d3cu c3Bpa2Vub3cuY29tLz9yZWY9c3Bpa2Utb3JnYW5pYy1zaWduYXR1cmUmX3RzPTZic3dvKQlbNmJz d29dCgpPbiBTZXB0ZW1iZXIgMjQsIDIwMTkgYXQgMTY6MzAgR01ULCBLZXZpbiBQIE5lYWwgPGtw bkBuZXV0cmFsZ29vZC5vcmc+IHdyb3RlOgoKT24gVHVlLCBTZXAgMjQsIDIwMTkgYXQgMTE6NDU6 MzdBTSAtMDQwMCwgSm9obiBGbGVtaW5nIHdyb3RlOgo+IERvbid0IGhhdmUgY3B1IGluZm8gaGFu ZC4uIHplb24gc29tZXRoaW5nLiBERFIzLTE2MDAgKDEyOEdCKQoKU2VlIC92YXIvcnVuL2RtZXNn LmJvb3QgZm9yIHRoZSBvdXRwdXQgb2YgdGhlIGRtZXNnIGNvbW1hbmQgYXMgb2YgYm9vdAp0aW1l LiBJdCBpbmNsdWRlcyB0aGUgdHlwZSBvZiBDUFUsIHRoZSBudW1iZXIgb2YgQ1BVcywgdGhlIG51 bWJlciBvZgp0aHJlYWRzLCBmZWF0dXJlcywgZGlzYWJsZWQgZmVhdHVyZXMsIGFuZCBzbyBvbiBh c2lkZSBmcm9tIHRoZSB0eXBlCm9mIG1lbW9yeS4gSSBkb24ndCB0aGluayB0aGF0J3MgYXZhaWxh YmxlIGluIGRtZXNnPwotLQpLZXZpbiBQLiBOZWFsIGh0dHA6Ly93d3cucG9ib3guY29tL35rcG4v CiJPaCwgSSd2ZSBoZWFyZCB0aGF0IHBhcmFkb3ggYSBjb3VwbGUgb2YgdGltZXMsIGJ1dCB0aGVy ZSdzIHNvbWV0aGluZwphYm91dCBhIGNhdCBkeWluZyBhbmQgSSBoYXRlIHRvIHRoaW5rIG9mIHN1 Y2ggdGhpbmdzLiIKLSBEci4gRG9uYWxkIEtudXRoIHNwZWFraW5nIG9mIFNjaHJvZGluZ2VyJ3Mg Y2F0LCBEZWNlbWJlciA4LCAxOTk5LCBNSVQKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KZnJlZWJzZC1zdGFibGVAZnJlZWJzZC5vcmcgbWFpbGluZyBsaXN0 Cmh0dHBzOi8vbGlzdHMuZnJlZWJzZC5vcmcvbWFpbG1hbi9saXN0aW5mby9mcmVlYnNkLXN0YWJs ZQpUbyB1bnN1YnNjcmliZSwgc2VuZCBhbnkgbWFpbCB0byAiZnJlZWJzZC1zdGFibGUtdW5zdWJz Y3JpYmVAZnJlZWJzZC5vcmci