Date: Fri, 25 Mar 2022 10:19:08 -0700 From: Alan Batie <alan@peak.org> To: freebsd-fs@freebsd.org Subject: Re: mirror vdevs with different sizes Message-ID: <1c0fc320-d5ae-06f7-73c1-36f54c8aeabf@peak.org> In-Reply-To: <202203251705.22PH56du029811@higson.cam.lispworks.com> References: <95932839-F6F8-4DCB-AA7F-46040CFA1DE1@jld3.net> <CAOtMX2jdRT1mmDzcPbkN42ruKe6gC5QaHQZRMmHeup=C562wFA@mail.gmail.com> <202203251705.22PH56du029811@higson.cam.lispworks.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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 oX9z4rwyYcFRwNJtA4Q7NrvmAgZUMUqMtlqBEHhgck05wShQ+vN8lJoNLiIpVe3fVpn29z1c xLy3xP87qOeiWJgurFsa6rs5vVSZz96R7hrjCx9wGL9uGPUqOzJiSJRffrLjdVPoAKjwp49r O+91p05Q4juVzGMrdpAe4ccc4QDdQO9uvgUe8rr0NdK4rbqZlZtCuh8CAwEAAaOCAa4wggGq MAwGA1UdEwEB/wQCMAAwHwYDVR0jBBgwFoAUvpepqoS/gL8QU30JMvnhLjIbz3cwfgYIKwYB BQUHAQEEcjBwMDsGCCsGAQUFBzAChi9odHRwOi8vY2FjZXJ0LmFjdGFsaXMuaXQvY2VydHMv YWN0YWxpcy1hdXRjbGlnMzAxBggrBgEFBQcwAYYlaHR0cDovL29jc3AwOS5hY3RhbGlzLml0 L1ZBL0FVVEhDTC1HMzAYBgNVHREEETAPgQ1hbGFuQHBlYWsub3JnMEcGA1UdIARAMD4wPAYG K4EfARgBMDIwMAYIKwYBBQUHAgEWJGh0dHBzOi8vd3d3LmFjdGFsaXMuaXQvYXJlYS1kb3du bG9hZDAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUHAwQwSAYDVR0fBEEwPzA9oDugOYY3 aHR0cDovL2NybDA5LmFjdGFsaXMuaXQvUmVwb3NpdG9yeS9BVVRIQ0wtRzMvZ2V0TGFzdENS TDAdBgNVHQ4EFgQUcuISJ82upP8iJblX7gwv+PLnWpswDgYDVR0PAQH/BAQDAgWgMA0GCSqG SIb3DQEBCwUAA4ICAQC+mMGSRBkavTrzfhnDT51ZVh6lJGCvI9SFhgeFtcfSNY4KCSQ54yZQ x82kwgQSFTUI3VRme2r3nINZcoaoAJ0p/Kfk2N5Pt4dgGTQmSyjS9BTDleMm04poagasF0YI eLf4xGW+e8OcSrBGwVx8XVZLDR7D08YeDT95ARIGEyBBuld1oSkKXeFaTAyuYOYeaYY6F14p TUNQvrTyZlUcgv7i1wsKKuXmP8Hb84ZkDmAiP/6urJdQAb0GEmbu9QjiL+h3BuTRiYTUmn7f OzeCKyLjf6UT8hC1G7rdOhEdybOOOmdD7kLFVkTcjq83SYhHc4Avm/kcEoVSCkOXu61SHU53 gIP751i8I+P88/GWQLY++VhYzZNkFQDxSYRMndkKdLfhr3b9DVCHflp2ohA0ZC0vT2aubJFW q3NsJYZ1Dm7tFCtV4CAseQl5Ci/421RLeiTTAI8Hx0H6FJZZxBRFfgZeisyHBfeILjWZcaUd DTTF5NZmjD0WmjZZSKZU+Xi34kvY5UY6GjurQ1exO9/xRM/dlPru1PxJZGrtpQREZn9jKEs+ BBMg/dmGkDNaGVZ/MZbJmBF0yYLz3eavfHFMj3c6H+bEljqBGxaDTR7rRaVdBu6r/vKbL+do hHXh7P5dAxY1JSrxFm2cdV0VlG8TjMsWZeW8mBs3gcIMI2nEzdqwezCCB20wggVVoAMCAQIC EBcQPt49ihy1ygZRk+fKQ2swDQYJKoZIhvcNAQELBQAwazELMAkGA1UEBhMCSVQxDjAMBgNV BAcMBU1pbGFuMSMwIQYDVQQKDBpBY3RhbGlzIFMucC5BLi8wMzM1ODUyMDk2NzEnMCUGA1UE AwweQWN0YWxpcyBBdXRoZW50aWNhdGlvbiBSb290IENBMB4XDTIwMDcwNjA4NDU0N1oXDTMw MDkyMjExMjIwMlowgYExCzAJBgNVBAYTAklUMRAwDgYDVQQIDAdCZXJnYW1vMRkwFwYDVQQH DBBQb250ZSBTYW4gUGlldHJvMRcwFQYDVQQKDA5BY3RhbGlzIFMucC5BLjEsMCoGA1UEAwwj QWN0YWxpcyBDbGllbnQgQXV0aGVudGljYXRpb24gQ0EgRzMwggIiMA0GCSqGSIb3DQEBAQUA A4ICDwAwggIKAoICAQDt5oeWocGktu3CQlX3Pw8PImBfE+CmQ4iGSZF5HBsvGlAP3EYB7va6 OobMUWHvxA+ACHEpWq0YfNh6rRUlULOGcIpEFtVf4nAiEvdQtiFQBmtWJSn3naoMHqpMvmwZ 4lL0Xr1U9JHmTqkU3DuYcNNO3S+hYWDZpWQbeSGibNVeiJ4kY6JDh0fvqloK1BsuS3n2OgAr PYGfAYtDjCvT2d+6Ym3kArHZjEcrZeBI+yVVnjPwbTSCKax8DtS2NP/CJ6RjpnRvuSwusRy8 4OdwdB71VKs1EDXj1ITcCWRZpkz+OhV6L8Zh+P0rmOSJF6KdHiaozfncURx4s54GFJNRGkx1 DnCxcuL0NJMYG42/hrDYOjNv+oGWSEZO/CT3aaLSMB5wTbZKfcD1R+tTanXD+5Gz5Mi15DTE 7QH8naZjZxqqhyxL1KyuIgaVDxvQtPSjo5vTsoa09rn+Ui8ybHnvYO/a/68OIQIHLGbUd2CO nwm0TiZ3Jg/oYGxwnJPvU1nDXNcecWTIJvFF5qD2ppJH3HgJVVePUEOY1E4Kp3k0B8hdRdhM V5n+O6RCKCTFcZaESF8sELgdrqnCLPP1+rX7DA8pxZoX0/9Jk64EOsbfQyLIJlrrob2YS0Xl ku6HisZ8qrHLhnkzF5y7O34xmatIp8oZ5c54QP+K5flnTYzWjuIxLwIDAQABo4IB9DCCAfAw DwYDVR0TAQH/BAUwAwEB/zAfBgNVHSMEGDAWgBRS2Ig6yJ94Zu2J83s4cJTJAgI20DBBBggr BgEFBQcBAQQ1MDMwMQYIKwYBBQUHMAGGJWh0dHA6Ly9vY3NwMDUuYWN0YWxpcy5pdC9WQS9B VVRILVJPT1QwRQYDVR0gBD4wPDA6BgRVHSAAMDIwMAYIKwYBBQUHAgEWJGh0dHBzOi8vd3d3 LmFjdGFsaXMuaXQvYXJlYS1kb3dubG9hZDAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUH AwQwgeMGA1UdHwSB2zCB2DCBlqCBk6CBkIaBjWxkYXA6Ly9sZGFwMDUuYWN0YWxpcy5pdC9j biUzZEFjdGFsaXMlMjBBdXRoZW50aWNhdGlvbiUyMFJvb3QlMjBDQSxvJTNkQWN0YWxpcyUy MFMucC5BLiUyZjAzMzU4NTIwOTY3LGMlM2RJVD9jZXJ0aWZpY2F0ZVJldm9jYXRpb25MaXN0 O2JpbmFyeTA9oDugOYY3aHR0cDovL2NybDA1LmFjdGFsaXMuaXQvUmVwb3NpdG9yeS9BVVRI LVJPT1QvZ2V0TGFzdENSTDAdBgNVHQ4EFgQUvpepqoS/gL8QU30JMvnhLjIbz3cwDgYDVR0P AQH/BAQDAgEGMA0GCSqGSIb3DQEBCwUAA4ICAQAmm+cbWQ10sxID6edV94SAhc1CwzthHFfH puYS30gisWUfWpgp43Dg1XzG2in3VGV7XrzCCGZh4JM/XQWp+4oxmyV42Qjz9vc8GRksgo6X 2nYObPYZzQjda9wxsCB38i4G3H33w8lf9sFvl0xm4ZXZ2s2bF/PdqvrK0ZgvF51+MoIPnli/ wJBw3p72xbk5Sb1MneSO3tZ293WFzDmz7tuGU0PfytYUkG7O6annGqbU1I6CA6QVKUqeFLPo dSODAFqJ3pimKD0vX9MuuSa0QinH7CkiPtZMD0mpwwzIsnSs3qOOl60tIZQOTc0I6lCe1LLh rz7Q75J6nNL9N5zVwZ1I3o2Lb8Dt7BA13VFuZvZIzapUGV83R7pmSVaj1Bik1nJ/R393e6mw ppsT140KDVLh4Oenywmp2VpBDuEj9RgICAO0sibv8n379LbO7ARa0kw9y9pggFzN2PAX25b7 w0n9m78kpv3z3vW65rs6wl7E8VEHNfv8+cnb81dxN3C51KElz+l31zchFTurD5HFEpyEhzO/ fMS5AkweRJIzwozxNs7OL/S/SVTpJLJL1ukZ1lnHHX0d3xCzRy/5HqfK3uiG22LPB5+RjNDo bPAjAz2BKMfkF/+v0pzn8mqqkopQaJzEAbLbMpgQYHRCjvrUxxwjJyUFb2Z+40UNtMF4MTK7 zTGCA/MwggPvAgEBMIGWMIGBMQswCQYDVQQGEwJJVDEQMA4GA1UECAwHQmVyZ2FtbzEZMBcG A1UEBwwQUG9udGUgU2FuIFBpZXRybzEXMBUGA1UECgwOQWN0YWxpcyBTLnAuQS4xLDAqBgNV BAMMI0FjdGFsaXMgQ2xpZW50IEF1dGhlbnRpY2F0aW9uIENBIEczAhAMMw88bglGagL44Ozs Sc8lMA0GCWCGSAFlAwQCAQUAoIICLTAYBgkqhkiG9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqG SIb3DQEJBTEPFw0yMjAzMjUxNzE5MDlaMC8GCSqGSIb3DQEJBDEiBCDxhX4vSKYn71lk57Uj KlOwTzt5KTOBVzrN7In/QCZ8OjBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjALBglg hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcG BSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGnBgkrBgEEAYI3EAQxgZkwgZYwgYExCzAJBgNVBAYT AklUMRAwDgYDVQQIDAdCZXJnYW1vMRkwFwYDVQQHDBBQb250ZSBTYW4gUGlldHJvMRcwFQYD VQQKDA5BY3RhbGlzIFMucC5BLjEsMCoGA1UEAwwjQWN0YWxpcyBDbGllbnQgQXV0aGVudGlj YXRpb24gQ0EgRzMCEAwzDzxuCUZqAvjg7OxJzyUwgakGCyqGSIb3DQEJEAILMYGZoIGWMIGB MQswCQYDVQQGEwJJVDEQMA4GA1UECAwHQmVyZ2FtbzEZMBcGA1UEBwwQUG9udGUgU2FuIFBp ZXRybzEXMBUGA1UECgwOQWN0YWxpcyBTLnAuQS4xLDAqBgNVBAMMI0FjdGFsaXMgQ2xpZW50 IEF1dGhlbnRpY2F0aW9uIENBIEczAhAMMw88bglGagL44OzsSc8lMA0GCSqGSIb3DQEBAQUA BIIBADThmVhySTafsfdIQ6Jnz96BaGjJSn98buqi1ZRdx2Pw6S1YVBnhbkFBVHKiDfEEHVkp gz3B4BnILAl9VseocdtEiLaK4f5ZUq2JyX+c3Cjj9nhsEk7p8MefwbJOE6YHmUbkA6OXhKsF LXQNzX2sqEOkgTq9VMsX90KNn9yjEDkRwpsQxxCLf9nVVuFsAXhuwd0DUPaJ23KTjXdS7V5Q o7+/R5ZQ6CuU5ZgXevGF/Aic0WP6no91IM780bQ3QWw0NfKTc2A6VybgaYRN0nZO0cRqbTgo pJ2uEFuD4AJqB8bvWEUfB4w8lCmVuftIyI3nGOI+e8W+TVuMDnk7jKu1XSUAAAAAAAA= --------------ms050104080603090904010909--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1c0fc320-d5ae-06f7-73c1-36f54c8aeabf>