From nobody Fri Mar 25 17:19:08 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 4E2A81A2FB92 for ; Fri, 25 Mar 2022 17:19:36 +0000 (UTC) (envelope-from alan@peak.org) Received: from zmail.rdrop.com (zmail.rdrop.com [199.26.172.25]) (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 4KQ83C2tQHz3ns4 for ; Fri, 25 Mar 2022 17:19:35 +0000 (UTC) (envelope-from alan@peak.org) Received: from localhost (localhost [IPv6:::1]) by zmail.rdrop.com (Postfix) with ESMTP id EA1A398040 for ; Fri, 25 Mar 2022 10:19:18 -0700 (PDT) Received: from zmail.rdrop.com ([IPv6:::1]) by localhost (zmail.rdrop.com [IPv6:::1]) (amavisd-new, port 10032) with ESMTP id RHwTkRwuQtnQ for ; Fri, 25 Mar 2022 10:19:18 -0700 (PDT) Received: from localhost (localhost [IPv6:::1]) by zmail.rdrop.com (Postfix) with ESMTP id 5675498042 for ; Fri, 25 Mar 2022 10:19:18 -0700 (PDT) X-Virus-Scanned: amavisd-new at zmail.rdrop.com Received: from zmail.rdrop.com ([IPv6:::1]) by localhost (zmail.rdrop.com [IPv6:::1]) (amavisd-new, port 10026) with ESMTP id WveMR90ktATU for ; Fri, 25 Mar 2022 10:19:18 -0700 (PDT) Received: from [IPV6:2607:f678:1::150] (valde.intranet.peak.org [IPv6:2607:f678:1::150]) by zmail.rdrop.com (Postfix) with ESMTPSA id D1F2498040 for ; Fri, 25 Mar 2022 10:19:17 -0700 (PDT) Message-ID: <1c0fc320-d5ae-06f7-73c1-36f54c8aeabf@peak.org> Date: Fri, 25 Mar 2022 10:19:08 -0700 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 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 From: Alan Batie Subject: Re: mirror vdevs with different sizes To: freebsd-fs@freebsd.org References: <95932839-F6F8-4DCB-AA7F-46040CFA1DE1@jld3.net> <202203251705.22PH56du029811@higson.cam.lispworks.com> Content-Language: en-US In-Reply-To: <202203251705.22PH56du029811@higson.cam.lispworks.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms050104080603090904010909" X-Rspamd-Queue-Id: 4KQ83C2tQHz3ns4 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=peak.org (policy=none); spf=fail (mx1.freebsd.org: domain of alan@peak.org does not designate 199.26.172.25 as permitted sender) smtp.mailfrom=alan@peak.org X-Spamd-Result: default: False [-4.09 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_FAIL(1.00)[-all]; RCVD_COUNT_FIVE(0.00)[6]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; SIGNED_SMIME(-2.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; HAS_ATTACHMENT(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_MEDIUM(-1.00)[-0.997]; NEURAL_HAM_SHORT(-0.99)[-0.991]; MLMMJ_DEST(0.00)[freebsd-fs]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:13868, ipnet:199.26.172.0/24, country:US]; RCVD_TLS_LAST(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; DMARC_POLICY_SOFTFAIL(0.10)[peak.org : No valid SPF, No valid DKIM,none] X-ThisMailContainsUnwantedMimeParts: N This is a cryptographically signed message in MIME format. --------------ms050104080603090904010909 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/25/22 10:05 AM, Martin Simmons wrote: > Is "the new disks will have a lower ratio of IOPS/TB" another way of saying > "more of the data will be stored on the new disks, so they will be accessed > more frequently"? Or is this something about larger vdevs in general? A disk can handle a certain number of IOPS, regardless of capacity (typically around 200 for spinning disks). Bigger disks will inherently have a lower ratio of IOPS/TB meaning you're not going to get the same level of overall performance with them. For example, if you have 2 1T drives, you have 400 IOPS available to access all of those 2 TB, whereas if you have 1 2T drive, you only have 200 IOPS available. --------------ms050104080603090904010909 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC DUkwggXUMIIDvKADAgECAhAMMw88bglGagL44OzsSc8lMA0GCSqGSIb3DQEBCwUAMIGBMQsw CQYDVQQGEwJJVDEQMA4GA1UECAwHQmVyZ2FtbzEZMBcGA1UEBwwQUG9udGUgU2FuIFBpZXRy bzEXMBUGA1UECgwOQWN0YWxpcyBTLnAuQS4xLDAqBgNVBAMMI0FjdGFsaXMgQ2xpZW50IEF1 dGhlbnRpY2F0aW9uIENBIEczMB4XDTIxMDkwNjE3NTI0M1oXDTIyMDkwNjE3NTI0M1owGDEW MBQGA1UEAwwNYWxhbkBwZWFrLm9yZzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB ALV/uIOK+Qf8ASno9qFxpCgp+6847hJbD4SSqk0S5z5xfQ+5KJnej80R0Ke6vhtJcsUfc4h1 yoVnT4zfM/Pipxjr93gUbB9qW/nM85Y3RmImG9/nFSoPVH4qLrjJo1OcEZsiQI2b/F5evPSO 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