From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f173.google.com ([209.85.213.173]:35075 "EHLO mail-ig0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752308AbaHDO0R (ORCPT ); Mon, 4 Aug 2014 10:26:17 -0400 Received: by mail-ig0-f173.google.com with SMTP id h18so5463314igc.12 for ; Mon, 04 Aug 2014 07:26:16 -0700 (PDT) Message-ID: <53DF9801.2050900@gmail.com> Date: Mon, 04 Aug 2014 10:26:09 -0400 From: Austin S Hemmelgarn MIME-Version: 1.0 To: Peter Waller CC: linux-btrfs@vger.kernel.org Subject: Re: ENOSPC with mkdir and rename References: <53DEE40C.6020403@cn.fujitsu.com> <17833067.mzxAL4oqZq@quad> <20140804102206.GA31950@carfax.org.uk> <20140804113231.GD31950@carfax.org.uk> <53DF9293.2090508@gmail.com> In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms080308060304090706090009" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms080308060304090706090009 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 2014-08-04 10:11, Peter Waller wrote: > On 4 August 2014 15:02, Austin S Hemmelgarn wrot= e: >> I really disagree with the statement that adding more storage is >> difficult or expensive, all you need to do is plug in a 2G USB flash >> drive, or allocate a ramdisk, and add the device to the filesystem onl= y >> long enough to do a full balance. >=20 > What if the machine is a server in a datacenter you don't have > physical access to and the problem is an emergency preventing your > users from being able to get work done? >=20 > What happens if you use a RAM disk and there is a power failure? >=20 I'm not saying that either option is a perfect solution. In fact, the only reason that I even mentioned the ramdisk is because I have had good success with that on my laptop, but then laptops essentially have a built-in UPS. I personally wouldn't use a ramdisk except as a last resort if you don't have some sort of UPS or redundancy in the PSU. --------------ms080308060304090706090009 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIGuDCC BrQwggScoAMCAQICAw8BRDANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNDA1 MTIxNDEwMzJaFw0xNDExMDgxNDEwMzJaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQDbLUaL Gs4JTdU7sgr0MzD57CMUAv307ddC9pxooDMN3PiUvzEd5kLtBCh8KDB1wbMdfm4hte2rDd+j hM1tIq67BvNbdDPztOcBZwT2/3OVyyG4B1ddCqUyt03zGKw6Y34eHNfapsZiiItX0GBNfjHU Wv+WDo+XNha/WmGSSMv21HkftF9XA1KC9Bpr9JJI23MKK7T2g/7b3KoGZlx3ekLIJsF5B7+B DMPPDqOHQbRnccyOHEMyhM13g6WoAbU+3aKYc+C/9UsYtDV+xlvBLWagky1acstD5wOA35V6 uDRbUhD+vOjuMRMCj9jJOIYqa6AeSagBjxRnisJr0RFzQ4f+NjGCHPaFTvRvbkiXh4q22doT 0SxbNBUm7B9ANugIOtS9/VQhTWKDi//WTqZQ7Ecl4yVJbMCUg/iaRHMCGS41vqMICPszRidW rL04NwS9D2cREEY1y/xrNo0ZvKPZu6tLhxhPf7w+5rsN3+wWxGaR1hNpnVUT9AeacLKZO6W9 FsRT3Unkr91IhQATHTKYr4EAkjN/5lgvA+sxp5TxxsUnoJYrD8IHf8aYfJsAHMleBwx4xSeZ tw/n5iIjJjFZq9IRZ1zQhK62p+a5vJ2vlJHjTgavhQrfb1pUOjbqsnI4ndQ5hNosL9el4Kxq Yko+HsxVEmSwSsjq6cV2L3oz0z8NUwIDAQABo4IBWTCCAVUwDAYDVR0TAQH/BAIwADBWBglg hkgBhvhCAQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg b3ZlciB0byBodHRwOi8vd3d3LkNBY2VydC5vcmcwDgYDVR0PAQH/BAQDAgOoMEAGA1UdJQQ5 MDcGCCsGAQUFBwMEBggrBgEFBQcDAgYKKwYBBAGCNwoDBAYKKwYBBAGCNwoDAwYJYIZIAYb4 QgQBMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAYYWaHR0cDovL29jc3AuY2FjZXJ0Lm9y ZzAxBgNVHR8EKjAoMCagJKAihiBodHRwOi8vY3JsLmNhY2VydC5vcmcvcmV2b2tlLmNybDA0 BgNVHREELTArgRRhaGZlcnJvaW43QGdtYWlsLmNvbYETYWhlbW1lbGdAb2hpb2d0LmNvbTAN BgkqhkiG9w0BAQ0FAAOCAgEAIokFPcW8+cO2Clu0Ei+ehAmQRBHfV5RWJ8aMVLXOCfiJX0ch IjVSIt6I3uQaR4J1ZIAjCSPkbpfZQDaLoGFI5j8aYEQhOeKxrvOMzY9/aSUYabCJIhE/sX64 klFV0bzm+PR9cDMWeQ9BoZf0m8UROPSfDnrjEk+p04hGg3pAZMcSwCzxdb604NHjgHJmf2xG UQVzQgC6Ek/BKat0xuPTuPmtPv9OicK75CPmLZKYW3rFpCD6bhb1mm+ROcCNhniRY2LYm9YN QdlHQUzTFqj0tvuYrzNI3LNV4PjEfN8z6omPCT2Rq8/uKLseN+m8F0ioqm+cphqpmzKoDUpN nePLkqDFUFWCeWRxSjBTy4IMVUfdNXriVGihH8hyIICQiOfmmBOzhzUifdomJuTGtoXRuHVT R2f/YdrJrLnKI4f+Othdp7F3KhB4c6JiOnTEH5J8n9q3rFjt4MPRwcjIHMhmF5nZVQlgxEMo 1cPCmvG1D9tcgXbH79jjqydo9SDXhzLQob7axkzGRY96IstNcvoQ/UNsdPPfFMYlHtGz4TxT DhBjv4ERskGmKBZrfmxkXkcuTV/gcykct6Xvw9YXb8WTL4qSYHSYk9fReVLgE/L4RBUpX2JJ QvIR0AJLER165/aZlQXZtuJjnfxJtJTJZZ+Gor9h0G2kuR5Dy0JuYdBO4t4xggShMIIEnQIB ATCBgDB5MRAwDgYDVQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5v cmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEW EnN1cHBvcnRAY2FjZXJ0Lm9yZwIDDwFEMAkGBSsOAwIaBQCgggH1MBgGCSqGSIb3DQEJAzEL BgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTE0MDgwNDE0MjYwOVowIwYJKoZIhvcNAQkE MRYEFEDd1K90UPZbAEuO/JohaUjrJ03kMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEq MAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwIC AUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgZEGCSsGAQQBgjcQBDGBgzCBgDB5MRAwDgYD VQQKEwdSb290IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMT GUNBIENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2Fj ZXJ0Lm9yZwIDDwFEMIGTBgsqhkiG9w0BCRACCzGBg6CBgDB5MRAwDgYDVQQKEwdSb290IENB MR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2ln bmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZwIDDwFE MA0GCSqGSIb3DQEBAQUABIICANUPOrov8u61qvtxp10GFGhh9DPfeNbFu3hWBfn1sOqmAWVh Dut1ILNnhpei2o5a2bLjJihxMSS4zCkMsDzFK0rcFShlfzqPdGxFi+HG4o0BDmut0KmuB6CW CYHpKZNDzK2cdq3OvG1SYHIUJ81lGH8V5xDFSAClffxskVAOerevyNIWIoXbWjkyVU/OAiOg WqzuytcEOWHXEW32wepeAvZlzC9FeqGrEMoIpUx+zIJwNPyzfIrP+JUxp0LocmLRGyoLYjog WK5izGUQjmphTIBq9wli2bcsCpigJCzu3hzVBK4/SSMe/mk0LJBOZlfbvHSEDaV95Gaex6Vq Ox1fCYxGRl6eAHGYuqsEydVXcl8MEQzSo6BNL7MgxnV3CgBdnmK9PO/sweW7Qi4IdALXq+nz vBkoz623jBNIbr00qAW2vRMJnDgB+l3R/37Jji9omZa5eJFWLgWYs64aJcTjl6iFneDUJUOg w71eGWZSKwQeD6izbjTldCggn8NLZT+0aBoI89BVOpNaEd2JXRCR1nU0VKBtzg1T8niBeulh 4xpbOx2Qv/mu8tQz17o1DnCRDBKp5hDhptPh3CABDCYi6mMSGTLj9UDDM4vyAW4BOY6XSHVc gx7rrKK+b3h67nCIwWwwz0reeu8XG9m7YvjJ1zpNoBqHqI1S7FKvMNzkBIgeAAAAAAAA --------------ms080308060304090706090009--