From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailgw-02.dd24.net ([193.46.215.43]:36661 "EHLO mailgw-02.dd24.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752767AbbL2PdE (ORCPT ); Tue, 29 Dec 2015 10:33:04 -0500 Message-ID: <1451403179.13713.11.camel@scientia.net> Subject: Re: [PATCH] BTRFS: Adds an option to select RAID Stripe size From: Christoph Anton Mitterer To: Sanidhya Solanki Cc: linux-btrfs@vger.kernel.org Date: Tue, 29 Dec 2015 16:32:59 +0100 In-Reply-To: <20151228212343.449c8631@gmail.com> References: <1451305451-31222-1-git-send-email-jpage.lkml@gmail.com> <1451341195.7094.0.camel@scientia.net> <20151228153801.6561feff@gmail.com> <1451352069.7094.3.camel@scientia.net> <20151228164333.2b8d8336@gmail.com> <1451360528.7094.7.camel@scientia.net> <20151228190336.59a3f440@gmail.com> <1451363188.7094.23.camel@scientia.net> <20151228203111.7ba8b0be@gmail.com> <1451368991.7094.45.camel@scientia.net> <20151228212343.449c8631@gmail.com> Content-Type: multipart/signed; micalg="sha-512"; protocol="application/x-pkcs7-signature"; boundary="=-ba1cAzVA0M0n4h/HqeRP" Mime-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: --=-ba1cAzVA0M0n4h/HqeRP Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2015-12-28 at 21:23 -0500, Sanidhya Solanki wrote: > From Documentation/filesystems/BTRFS.txt: > Btrfs is under heavy development, and is not suitable for > any uses other than benchmarking and review. Well I guess now it's time for Duncan's usual "stable or not" talk (@Duncan, I think by now, you should have made it into some verse or ballad form... :D for general pleasure ;) ) > The kernel module "ZFS on Linux" is still actively developed > according > to their repo activity (https://github.com/zfsonlinux/zfs). It is don > e > by a subcontractor for Lawrence Livermore National Laboratory. > Considering they are still in preparation for their Next Generation > Supercomputer (Summit), we can assume that they will keep financing > the > development. Sure, I know,... zfs-fuse (i.e. the fuse and not the kernel module version) is AFAIC, unmaintained (or soon to be). > I just started working recently on BTRFS, I forgot about the CoW > part. No worries. As I've said,... you probably should have some deeper discussions with the core developers on how they think variable chunk size support and any reshaping should be implemented. Otherwise you may just put a lot of effort into something, that may conflict some other longer term design ideas. Cheers, Chris. --=-ba1cAzVA0M0n4h/HqeRP Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCEZIw ggW/MIIDp6ADAgECAgMCOakwDQYJKoZIhvcNAQENBQAwVDEUMBIGA1UEChMLQ0FjZXJ0IEluYy4x HjAcBgNVBAsTFWh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzEcMBoGA1UEAxMTQ0FjZXJ0IENsYXNzIDMg Um9vdDAeFw0xNDA2MTIxNjM2MThaFw0xNjA2MTExNjM2MThaMHwxITAfBgNVBAMTGENocmlzdG9w aCBBbnRvbiBNaXR0ZXJlcjEkMCIGCSqGSIb3DQEJARYVY2FsZXN0eW9Ac2NpZW50aWEubmV0MTEw LwYJKoZIhvcNAQkBFiJtYWlsQGNocmlzdG9waC5hbnRvbi5taXR0ZXJlci5uYW1lMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4phP/j9vT9dZT+k3ffHxvRWMOuzBnu5O3Fl4y2+WL7pL rfLiEhWzGXhHvjSqpt4vCNSdqy43453nnu8+hMb+uEtqSIL1AHU5eLhuDNVN9S4bt9E7nA2WKYBU LCUi/xCD/GL7ToyJNwhrhzcCZ7pXSc3xVqFoC4f6weU9ExhoEZQNRpTM0BFCOi4fRxvKFNnUYgjK hqy0Ta5H0Xx86mAp0Q4dxoD7mhI5iTF6TRkUheELxF24JCuAf04M89Cwft6DRH1FpJ3yvgW2B5U5 aFSL4ZnF4N/wyCB7Dkm1rQ7RCAvw5btkf0VdPnU7ccDCx8HEc2nxK/lbCjrznvh3sa1CCwIDAQAB o4IBcDCCAWwwDAYDVR0TAQH/BAIwADBWBglghkgBhvhCAQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNl cnRpZmljYXRlIGZvciBGUkVFIGhlYWQgb3ZlciB0byBodHRwOi8vd3d3LkNBY2VydC5vcmcwDgYD VR0PAQH/BAQDAgOoMEAGA1UdJQQ5MDcGCCsGAQUFBwMEBggrBgEFBQcDAgYKKwYBBAGCNwoDBAYK KwYBBAGCNwoDAwYJYIZIAYb4QgQBMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDov L29jc3AuY2FjZXJ0Lm9yZzA4BgNVHR8EMTAvMC2gK6AphidodHRwOi8vY3JsLmNhY2VydC5vcmcv Y2xhc3MzLXJldm9rZS5jcmwwRAYDVR0RBD0wO4EVY2FsZXN0eW9Ac2NpZW50aWEubmV0gSJtYWls QGNocmlzdG9waC5hbnRvbi5taXR0ZXJlci5uYW1lMA0GCSqGSIb3DQEBDQUAA4ICAQBefctiLgGl e5baspuozyA4k7Up7SVhGHbif6pQfoFc/9Thx9GXnYpX+U64PMyWBfWwHZIy52Vg0RVkvPi1t6mi GyBfoSpC6ooR0bKWtUIogw/ymqKWlTLVR8kbLqRmRk4juMtCXG2K3yMygX/rjkuUSuFj2Bjpkmzg CtMojbUMYbszePmhQ7DJ62YEdtKpcjN94QAsI5GWlIAbs3KJazAcaNCRJeXCLcUMchyKHJA+NXH5 az/ekBxBMBzJP2An20PP88UI4JW18z31KiG9UVGa2uO4l4aWgVe2GnhNEdCD/o48msJEWKAt5vl2 yMqr7ihmNPocU2+/FW0xPe/vftdOTD9pgXdSGf4prdD+23q2YvpalOCzr2p8yCJZNVBPMxAP4mL0 3OEktXza4wohqAmceXKfGUNwRGBaPvtIGnPrpLhCQ+2YJDg8g1UEsk23bKyZlJWeKJyVqOBsDJmj aBsN/qKhQFnav+zQdqGhMeaSisF/53mD3gyVYg2JRl18apgGbg32kyLmomqa0JbhnY3Dc3FVtZfe +P+s2Cyep3pVKvFer2llRoGm8TwraG5Yhyx8Oq/1qETpstjbURJOVBLDCV4AjOEUj0ZnE/tEo/DK yexgGaViNvjp+IZdFdJhYmsVjw4Q3vG7O0pfsLiYEyQjeDgjNEWDfa5/MufPywIfxzCCBb8wggOn oAMCAQICAwI5qTANBgkqhkiG9w0BAQ0FADBUMRQwEgYDVQQKEwtDQWNlcnQgSW5jLjEeMBwGA1UE CxMVaHR0cDovL3d3dy5DQWNlcnQub3JnMRwwGgYDVQQDExNDQWNlcnQgQ2xhc3MgMyBSb290MB4X DTE0MDYxMjE2MzYxOFoXDTE2MDYxMTE2MzYxOFowfDEhMB8GA1UEAxMYQ2hyaXN0b3BoIEFudG9u IE1pdHRlcmVyMSQwIgYJKoZIhvcNAQkBFhVjYWxlc3R5b0BzY2llbnRpYS5uZXQxMTAvBgkqhkiG 9w0BCQEWIm1haWxAY2hyaXN0b3BoLmFudG9uLm1pdHRlcmVyLm5hbWUwggEiMA0GCSqGSIb3DQEB AQUAA4IBDwAwggEKAoIBAQDimE/+P29P11lP6Td98fG9FYw67MGe7k7cWXjLb5Yvukut8uISFbMZ eEe+NKqm3i8I1J2rLjfjneee7z6Exv64S2pIgvUAdTl4uG4M1U31Lhu30TucDZYpgFQsJSL/EIP8 YvtOjIk3CGuHNwJnuldJzfFWoWgLh/rB5T0TGGgRlA1GlMzQEUI6Lh9HG8oU2dRiCMqGrLRNrkfR fHzqYCnRDh3GgPuaEjmJMXpNGRSF4QvEXbgkK4B/Tgzz0LB+3oNEfUWknfK+BbYHlTloVIvhmcXg 3/DIIHsOSbWtDtEIC/Dlu2R/RV0+dTtxwMLHwcRzafEr+VsKOvOe+HexrUILAgMBAAGjggFwMIIB bDAMBgNVHRMBAf8EAjAAMFYGCWCGSAGG+EIBDQRJFkdUbyBnZXQgeW91ciBvd24gY2VydGlmaWNh dGUgZm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzAOBgNVHQ8BAf8E BAMCA6gwQAYDVR0lBDkwNwYIKwYBBQUHAwQGCCsGAQUFBwMCBgorBgEEAYI3CgMEBgorBgEEAYI3 CgMDBglghkgBhvhCBAEwMgYIKwYBBQUHAQEEJjAkMCIGCCsGAQUFBzABhhZodHRwOi8vb2NzcC5j YWNlcnQub3JnMDgGA1UdHwQxMC8wLaAroCmGJ2h0dHA6Ly9jcmwuY2FjZXJ0Lm9yZy9jbGFzczMt cmV2b2tlLmNybDBEBgNVHREEPTA7gRVjYWxlc3R5b0BzY2llbnRpYS5uZXSBIm1haWxAY2hyaXN0 b3BoLmFudG9uLm1pdHRlcmVyLm5hbWUwDQYJKoZIhvcNAQENBQADggIBAF59y2IuAaV7ltqym6jP IDiTtSntJWEYduJ/qlB+gVz/1OHH0Zedilf5Trg8zJYF9bAdkjLnZWDRFWS8+LW3qaIbIF+hKkLq ihHRspa1QiiDD/KaopaVMtVHyRsupGZGTiO4y0JcbYrfIzKBf+uOS5RK4WPYGOmSbOAK0yiNtQxh uzN4+aFDsMnrZgR20qlyM33hACwjkZaUgBuzcolrMBxo0JEl5cItxQxyHIockD41cflrP96QHEEw HMk/YCfbQ8/zxQjglbXzPfUqIb1RUZra47iXhpaBV7YaeE0R0IP+jjyawkRYoC3m+XbIyqvuKGY0 +hxTb78VbTE97+9+105MP2mBd1IZ/imt0P7berZi+lqU4LOvanzIIlk1UE8zEA/iYvTc4SS1fNrj CiGoCZx5cp8ZQ3BEYFo++0gac+ukuEJD7ZgkODyDVQSyTbdsrJmUlZ4onJWo4GwMmaNoGw3+oqFA Wdq/7NB2oaEx5pKKwX/neYPeDJViDYlGXXxqmAZuDfaTIuaiaprQluGdjcNzcVW1l974/6zYLJ6n elUq8V6vaWVGgabxPCtobliHLHw6r/WoROmy2NtREk5UEsMJXgCM4RSPRmcT+0Sj8MrJ7GAZpWI2 +On4hl0V0mFiaxWPDhDe8bs7Sl+wuJgTJCN4OCM0RYN9rn8y58/LAh/HMIIGCDCCA/CgAwIBAgIB ATANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3 LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG 9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0wNTEwMTQwNzM2NTVaFw0zMzAzMjgwNzM2NTVa MFQxFDASBgNVBAoTC0NBY2VydCBJbmMuMR4wHAYDVQQLExVodHRwOi8vd3d3LkNBY2VydC5vcmcx HDAaBgNVBAMTE0NBY2VydCBDbGFzcyAzIFJvb3QwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIK AoICAQCrSTURSHzSJn5TlM9Dqd0o10Iqi/OHeBlYfA+e2ol94fvrcpANdKGWZKufoCSZc9riVXbH F3v1BKxGuMO+f2SNEGwk82GcwPKQ+lHm9WkBY8MPVuJKQs/iRIwlKKjFeQl9RrmK8+nzNCkIReQc n8uUBByBqBSzmGXEQ+xOgo0J0b2qW42S0OzekMV/CsLj6+YxWl50PpczWejDAz1gM7/30W9HxM3u YoNSbi4ImqTZFRiRpoWSR7CuSOtttyHshRpocjWr//AQXcD0lKdq1TuSfkyQBX6TwSyLpI5idBVx bgtxA+qvFTia1NIFcm+M+SvrWnIl+TlG43IbPgTDZCciECqKT1inA62+tC4T7V2qSNfVfdQqe1z6 RgRQ5MwOQluM7dvyz/yWk+DbETZUYjQ4jwxgmzuXVjit89Jbi6Bb6k6WuHzX1aCGcEDTkSm3ojyt 9Yy7zxqSiuQ0e8DYbF/pCsLDpyCaWt8sXVJcukfVm+8kKHA4IC/VfynAskEDaJLM4JzMl0tF7zoQ CqtwOpiVcK01seqFK6QcgCExqa5geoAmSAC4AcCTY1UikTxW56/bOiXzjzFU6iaLgVn5odFTEcV7 nQP2dBHgbbEsPyyGkZlxmqZ3izRg0RS0LKydr4wQ05/EavhvE/xzWfdmQnQeiuP43NJvmJzLR5iV QAX76QIDAQABo4G/MIG8MA8GA1UdEwEB/wQFMAMBAf8wXQYIKwYBBQUHAQEEUTBPMCMGCCsGAQUF BzABhhdodHRwOi8vb2NzcC5DQWNlcnQub3JnLzAoBggrBgEFBQcwAoYcaHR0cDovL3d3dy5DQWNl cnQub3JnL2NhLmNydDBKBgNVHSAEQzBBMD8GCCsGAQQBgZBKMDMwMQYIKwYBBQUHAgEWJWh0dHA6 Ly93d3cuQ0FjZXJ0Lm9yZy9pbmRleC5waHA/aWQ9MTAwDQYJKoZIhvcNAQEEBQADggIBAH8IiKHa GlBJ2on7oQhy84r3HsQ6tHlbIDCxRd7CXdNlafHCXVRUPIVfuXtCkcKZ/RtRm6tGpaEQU55tiKxz biwzpvD0nuB1wT6IRanhZkP+VlrRekF490DaSjrxC1uluxYG5sLnk7mFTZdPsR44Q4Dvmw2M77in YACHV30eRBzLI++bPJmdr7UpHEV5FpZNJ23xHGzDwlVks7wU4vOkHx4y/CcVBc/dLq4+gmF78CEQ GPZE6lM5+dzQmiDgxrvgu1pPxJnIB721vaLbLmINQjRBvP+LivVRIqqIMADisNS8vmW61QNXeZvo 3MhN+FDtkaVSKKKs+zZYPumUK5FQhxvWXtaMzPcPEAxSTtAWYeXlCmy/F8dyRlecmPVsYGN6b165 Ti/Iubm7aoW8mA3t+T6XhDSUrgCvoeXnkm5OvfPi2RSLXNLrAWygF6UtEOucekq9ve7O/e0iQKtw OIj1CodqwqsFYMlIBdpTwd5Ed2qz8zw87YC8pjhKKSRf/lk7myV6VmMAZLldpGJ9VzZPrYPvH5JT oI53V93lYRE9IwCQTDz6o2CTBKOvNfYOao9PSmCnhQVsRqGP9Md246FZV/dxssRuFFxtbUFm3xuT sdQAw+7Lzzw9IYCpX2Nl/N3gX6T0K/CFcUHUZyX7GrGXrtaZghNB0m6lG5kngOcLqagAMYIC7TCC AukCAQEwWzBUMRQwEgYDVQQKEwtDQWNlcnQgSW5jLjEeMBwGA1UECxMVaHR0cDovL3d3dy5DQWNl cnQub3JnMRwwGgYDVQQDExNDQWNlcnQgQ2xhc3MgMyBSb290AgMCOakwDQYJYIZIAWUDBAIDBQCg ggFjMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE1MTIyOTE1MzI1 OVowTwYJKoZIhvcNAQkEMUIEQAd/QNfWf4+/iYqkueXINJAjQcDZnAhw28CwHbPJ8w6gYfMFlH2a Mf8DynHgMBAegvcSMmcf74czbLYOuN9YUjgwagYJKwYBBAGCNxAEMV0wWzBUMRQwEgYDVQQKEwtD QWNlcnQgSW5jLjEeMBwGA1UECxMVaHR0cDovL3d3dy5DQWNlcnQub3JnMRwwGgYDVQQDExNDQWNl cnQgQ2xhc3MgMyBSb290AgMCOakwbAYLKoZIhvcNAQkQAgsxXaBbMFQxFDASBgNVBAoTC0NBY2Vy dCBJbmMuMR4wHAYDVQQLExVodHRwOi8vd3d3LkNBY2VydC5vcmcxHDAaBgNVBAMTE0NBY2VydCBD bGFzcyAzIFJvb3QCAwI5qTANBgkqhkiG9w0BAQEFAASCAQCc9wUFV/stS33t7OlkEwPmxkPmjjnw 8WrU3gk9yR/18m8cnD0ytA9D37D1qEFDDBoQKnXWLbi9bst1yT8a+N1MzBNFCEMobCwhYlYQV9q8 EMZnbCTyLymnSjlhy27mz57ktratTiWG3pnskIloV0s7KQCylzsL0Mbm7qbRnvZifnIvq+2v1zuc llh82lm5R+LqVOC7ubX0Xs/Hiw0RK2BYN+edW3AZYEFn9/70Nm1oDENzVjMf5RZ68I9cxiQlRKrQ TG8stqb6bY+RVhyYNsqauT/gmWRuXViqn4ZkYmdnBCTzJ5ALSVRUlejC+S2yQVfpzuy6uEEgDIp5 AQSP2LNKAAAAAAAA --=-ba1cAzVA0M0n4h/HqeRP--