Date: Fri, 22 Jul 2016 14:27:11 -0500 From: Karl Denninger <karl@denninger.net> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: ZFS, SSD and encryption Message-ID: <c52ebaa8-e82b-1a17-d868-52c40032c3d5@denninger.net> In-Reply-To: <CAASnNnpnST%2BD6fVT%2BFrH%2BomkwNQb4rG1NJk0T=O2AetzrXEThA@mail.gmail.com> References: <CAJPDrRtLBNKr4BynSGMRfFGdAR0ZbDuwfcqkLupvk5HtgqrbQg@mail.gmail.com> <b8b000ff-289c-7348-8b63-00f3ac51accf@denninger.net> <CAASnNnpnST%2BD6fVT%2BFrH%2BomkwNQb4rG1NJk0T=O2AetzrXEThA@mail.gmail.com>
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This is a cryptographically signed message in MIME format. --------------ms030204080903060606070702 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 7/22/2016 14:02, Eric A. Borisch wrote: > On Friday, July 22, 2016, Karl Denninger <karl@denninger.net > <mailto:karl@denninger.net>> wrote: > > > On 7/22/2016 07:48, Nikos Kastanas wrote: > > I have a Lenovo X220 laptop running FreeBSD 10.3-RELEASE with > ZFS and > > encryption on a plain HDD. I am considering buying a Samsung Pro > 850 SSD to > > boost performance but I am not sure if TRIM and ZFS+Encryption > work well > > together. After some research online, I found *this page* > > <https://www.freebsd.org/doc/faq/all-about-zfs.html>which states = the > > following: > > > > *Note: * > > ZFS TRIM may not work with all configurations, such as a ZFS > filesystem on > > a GELI-backed device. > > > > From what I can understand from the above note, I should not use = the > > encryption option when installing FreeBSD with ZFS on an SSD. > TRIM will not > > work correctly and therefore the SSD performace will be impacted.= > Meh. Simply not true. =20 > > > It will not work on 10.3, but will work (as Karl demonstrates) on > 11.x. Here's the commit to head enabling it: > > https://svnweb.freebsd.org/base?view=3Drevision&revision=3D286444 > > And here's what is in 10.3 (BIO_DELETE case returns EOPNOTSUPP):=20 > > https://svnweb.freebsd.org/base/releng/10.3/sys/geom/eli/g_eli.c?revisi= on=3D296373&view=3Dmarkup#l319 > > - Eric Note that the system in question (from which the stats were pulled) was on 10.2 for an extended period of time, with SSDs, and with Geli-encrypted disks. It was fine with no performance issues; whether there is a problem with earlier releases has much to do with the disks in question. In the case of the Intel 730s it works perfectly well even though TRIM is not passed through in that case. --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms030204080903060606070702 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Bl8wggZbMIIEQ6ADAgECAgEpMA0GCSqGSIb3DQEBCwUAMIGQMQswCQYDVQQGEwJVUzEQMA4G A1UECBMHRmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3Rl bXMgTExDMRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhND dWRhIFN5c3RlbXMgTExDIENBMB4XDTE1MDQyMTAyMjE1OVoXDTIwMDQxOTAyMjE1OVowWjEL MAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExGTAXBgNVBAoTEEN1ZGEgU3lzdGVtcyBM TEMxHjAcBgNVBAMTFUthcmwgRGVubmluZ2VyIChPQ1NQKTCCAiIwDQYJKoZIhvcNAQEBBQAD ggIPADCCAgoCggIBALmEWPhAdphrWd4K5VTvE5pxL3blRQPyGF3ApjUjgtavqU1Y8pbI3Byg XDj2/Uz9Si8XVj/kNbKEjkRh5SsNvx3Fc0oQ1uVjyCq7zC/kctF7yLzQbvWnU4grAPZ3IuAp 3/fFxIVaXpxEdKmyZAVDhk9az+IgHH43rdJRIMzxJ5vqQMb+n2EjadVqiGPbtG9aZEImlq7f IYDTnKyToi23PAnkPwwT+q1IkI2DTvf2jzWrhLR5DTX0fUYC0nxlHWbjgpiapyJWtR7K2YQO aevQb/3vN9gSojT2h+cBem7QIj6U69rEYcEDvPyCMXEV9VcXdcmW42LSRsPvZcBHFkWAJqMZ Myiz4kumaP+s+cIDaXitR/szoqDKGSHM4CPAZV9Yh8asvxQL5uDxz5wvLPgS5yS8K/o7zDR5 vNkMCyfYQuR6PAJxVOk5Arqvj9lfP3JSVapwbr01CoWDBkpuJlKfpQIEeC/pcCBKknllbMYq yHBO2TipLyO5Ocd1nhN/nOsO+C+j31lQHfOMRZaPQykXVPWG5BbhWT7ttX4vy5hOW6yJgeT/ o3apynlp1cEavkQRS8uJHoQszF6KIrQMID/JfySWvVQ4ksnfzwB2lRomrdrwnQ4eG/HBS+0l eozwOJNDIBlAP+hLe8A5oWZgooIIK/SulUAsfI6Sgd8dTZTTYmlhAgMBAAGjgfQwgfEwNwYI KwYBBQUHAQEEKzApMCcGCCsGAQUFBzABhhtodHRwOi8vY3VkYXN5c3RlbXMubmV0Ojg4ODgw CQYDVR0TBAIwADARBglghkgBhvhCAQEEBAMCBaAwCwYDVR0PBAQDAgXgMCwGCWCGSAGG+EIB DQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUxRyULenJaFwX RtT79aNmIB/u5VkwHwYDVR0jBBgwFoAUJHGbnYV9/N3dvbDKkpQDofrTbTUwHQYDVR0RBBYw FIESa2FybEBkZW5uaW5nZXIubmV0MA0GCSqGSIb3DQEBCwUAA4ICAQBPf3cYtmKowmGIYsm6 eBinJu7QVWvxi1vqnBz3KE+HapqoIZS8/PolB/hwiY0UAE1RsjBJ7yEjihVRwummSBvkoOyf G30uPn4yg4vbJkR9lTz8d21fPshWETa6DBh2jx2Qf13LZpr3Pj2fTtlu6xMYKzg7cSDgd2bO sJGH/rcvva9Spkx5Vfq0RyOrYph9boshRN3D4tbWgBAcX9POdXCVfJONDxhfBuPHsJ6vEmPb An+XL5Yl26XYFPiODQ+Qbk44Ot1kt9s7oS3dVUrh92Qv0G3J3DF+Vt6C15nED+f+bk4gScu+ JHT7RjEmfa18GT8DcT//D1zEke1Ymhb41JH+GyZchDRWtjxsS5OBFMzrju7d264zJUFtX7iJ 3xvpKN7VcZKNtB6dLShj3v/XDsQVQWXmR/1YKWZ93C3LpRs2Y5nYdn6gEOpL/WfQFThtfnat HNc7fNs5vjotaYpBl5H8+VCautKbGOs219uQbhGZLYTv6okuKcY8W+4EJEtK0xB08vqr9Jd0 FS9MGjQE++GWo+5eQxFt6nUENHbVYnsr6bYPQsZH0CRNycgTG9MwY/UIXOf4W034UpR82TBG 1LiMsYfb8ahQJhs3wdf1nzipIjRwoZKT1vGXh/cj3gwSr64GfenURBxaFZA5O1acOZUjPrRT n3ci4McYW/0WVVA3lDGCBRMwggUPAgEBMIGWMIGQMQswCQYDVQQGEwJVUzEQMA4GA1UECBMH RmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3RlbXMgTExD MRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhNDdWRhIFN5 c3RlbXMgTExDIENBAgEpMA0GCWCGSAFlAwQCAwUAoIICTTAYBgkqhkiG9w0BCQMxCwYJKoZI hvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNjA3MjIxOTI3MTFaME8GCSqGSIb3DQEJBDFCBEDT eK5yeBCTN9Bo4jO9FcKESDU0Hpzso+LI8ouoAnVzpsLO0uDTNajK5KM/YuJDmu+ik7FVbh1I qqjZx3sWFIu0MGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEqMAsGCWCGSAFlAwQBAjAK BggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAwBwYFKw4DAgcwDQYI KoZIhvcNAwICASgwgacGCSsGAQQBgjcQBDGBmTCBljCBkDELMAkGA1UEBhMCVVMxEDAOBgNV BAgTB0Zsb3JpZGExEjAQBgNVBAcTCU5pY2V2aWxsZTEZMBcGA1UEChMQQ3VkYSBTeXN0ZW1z IExMQzEcMBoGA1UEAxMTQ3VkYSBTeXN0ZW1zIExMQyBDQTEiMCAGCSqGSIb3DQEJARYTQ3Vk YSBTeXN0ZW1zIExMQyBDQQIBKTCBqQYLKoZIhvcNAQkQAgsxgZmggZYwgZAxCzAJBgNVBAYT AlVTMRAwDgYDVQQIEwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoTEEN1 ZGEgU3lzdGVtcyBMTEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExIjAgBgkqhkiG 9w0BCQEWE0N1ZGEgU3lzdGVtcyBMTEMgQ0ECASkwDQYJKoZIhvcNAQEBBQAEggIAWReoF+Uk 8mBxC/Lp9k51FtW+aX6/D/MjO7Xt5vdJ/yVbaB4+xPZ2N8FS0S+GgZNUYkz7ztGeG74kfoPV vt22eA2nc0W91pm7kprpFc5vLjIUZjcKDhpsV8qnMcCTSElnxgyTP9zH5msZfEwKAHBar3Ic jL3h5SQcqy+zL5+wK7G3mNz9sYvXrF9O4gMcgAhlqImu1BoVheuXZ3prf236DE8K0mc9TiVO pJTfGUkpoRgRgqiSjIAxikn1d8nsDM66ps9x67Dz4Yr7eDP8NBP0XsP+uH+gMFOn255F4pd7 1LE3IQ2BWS0ka4U8R5q3XaHYTfcEiF95trvO+cVtqCERga8LadU6xdknPYTyK/7tIv3KfcIw XNZkPhlzxDcjMU7N4+7yGpkYGeifpW6Y2EZsqYyRSO1ebaZEcEEFx2G/TsJrv5pk8sdeCeTh rVBF/c1EHrDgzawDW0MgVlSpBLol99r8IhvjKjALFVFrWlVWapI8JCQLg0tGTbBMUTaFJYMU CQXtF4jMFQl3vS0WKeN/LbO1KUeftdOl2kgDcqdM7YQe/rPC34ZHnmGifX5FOzlVvZM4efrA E5HfOilgFfDla1pYi3KBlJE4hgi321NJ33xhWCfpd65h9nGfozBQtsQ6HKYqYkxbQci2D/zE iBcUq1HAHAvPe7rTF+gIDt9GyzEAAAAAAAA= --------------ms030204080903060606070702--
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