From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f178.google.com ([209.85.213.178]:39808 "EHLO mail-ig0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932474AbaJVLWk (ORCPT ); Wed, 22 Oct 2014 07:22:40 -0400 Received: by mail-ig0-f178.google.com with SMTP id h3so682382igd.5 for ; Wed, 22 Oct 2014 04:22:39 -0700 (PDT) Message-ID: <54479379.2000502@gmail.com> Date: Wed, 22 Oct 2014 07:22:33 -0400 From: Austin S Hemmelgarn MIME-Version: 1.0 To: Arnaud Kapp , linux-btrfs Subject: Re: device balance times References: <845c0ca8cc78ed97da487bf7f4b7b122@admin.virtall.com> <5446BEC0.8070009@siedziba.pl> <5446C597.9080904@gmail.com> In-Reply-To: <5446C597.9080904@gmail.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms050908090104020300030402" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms050908090104020300030402 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable On 2014-10-21 16:44, Arnaud Kapp wrote: > Hello, > > I would like to ask if the balance time is related to the number of > snapshot or if this is related only to data (or both). > > I currently have about 4TB of data and around 5k snapshots. I'm thinkin= g > of going raid1 instead of single. From the numbers I see this seems > totally impossible as it would take *way* too long. > > Would destroying snapshots (those are hourly snapshots to prevent stupi= d > error to happens, like `rm my_important_file`) help? > > Should I reconsider moving to raid1 because of the time it would take? > > Sorry if I'm somehow hijacking this thread, but it seemed related :) > > Thanks, > The issue is the snapshots, because I regularly fully re-balance my home = directory on my desktop which is ~150GB on a BTRFS raid10 setup with=20 only 3 or 4 snapshots (I only do daily snapshots, cause anything I need=20 finer granularity on I have under git), and that takes only about 2 or 3 = hours depending on how many empty chunks I have. I would remove the snapshots, and also start keeping fewer of them (5k=20 hourly snapshots is more than six months worth of file versions), and=20 then run the balance. I would also suggest converting data by itself=20 first, and then converting metadata, as converting data chunks will=20 require re-writing large parts of the metadata. > On 10/21/2014 10:14 PM, Piotr Paw=C5=82ow wrote: >> On 21.10.2014 20:59, Tomasz Chmielewski wrote: >>> FYI - after a failed disk and replacing it I've run a balance; it too= k >>> almost 3 weeks to complete, for 120 GBs of data: >> >> Looks normal to me. Last time I started a balance after adding 6th >> device to my FS, it took 4 days to move 25GBs of data. Some chunks too= k >> 20 hours to move. I currently have 156 snapshots on this FS (nightly >> rsync backups). >> >> I think it is so slow, because it's disassembling chunks piece by piec= e >> and stuffing these pieces elsewhere, instead of moving chunks as a >> whole. If you have a lot of little pieces (as I do), it will take a >> while... >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-btrfs"= in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --------------ms050908090104020300030402 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFuDCC BbQwggOcoAMCAQICAw9gVDANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNDA4 MDgxMTMwNDRaFw0xNTAyMDQxMTMwNDRaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDdmm8R BM5D6fGiB6rpogPZbLYu6CkU6834rcJepfmxKnLarYUYM593/VGygfaaHAyuc8qLaRA3u1M0 Qp29flqmhv1VDTBZ+zFu6JgHjTDniBii1KOZRo0qV3jC5NvaS8KUM67+eQBjm29LhBWVi3+e a8jLxmogFXV0NGej+GHIr5zA9qKz2WJOEoGh0EfqZ2MQTmozcGI43/oqIYhRj8fRMkWXLUAF WsLzPQMpK19hD8fqwlxQWhBV8gsGRG54K5pyaQsjne7m89SF5M8JkNJPH39tHEvfv2Vhf7EM Y4WGyhLAULSlym1AI1uUHR1FfJaj3AChaEJZli/AdajYsqc7AgMBAAGjggFZMIIBVTAMBgNV HRMBAf8EAjAAMFYGCWCGSAGG+EIBDQRJFkdUbyBnZXQgeW91ciBvd24gY2VydGlmaWNhdGUg Zm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzAOBgNVHQ8BAf8E BAMCA6gwQAYDVR0lBDkwNwYIKwYBBQUHAwQGCCsGAQUFBwMCBgorBgEEAYI3CgMEBgorBgEE AYI3CgMDBglghkgBhvhCBAEwMgYIKwYBBQUHAQEEJjAkMCIGCCsGAQUFBzABhhZodHRwOi8v b2NzcC5jYWNlcnQub3JnMDEGA1UdHwQqMCgwJqAkoCKGIGh0dHA6Ly9jcmwuY2FjZXJ0Lm9y Zy9yZXZva2UuY3JsMDQGA1UdEQQtMCuBFGFoZmVycm9pbjdAZ21haWwuY29tgRNhaGVtbWVs Z0BvaGlvZ3QuY29tMA0GCSqGSIb3DQEBDQUAA4ICAQCr4klxcZU/PDRBpUtlb+d6JXl2dfto OUP/6g19dpx6Ekt2pV1eujpIj5whh5KlCSPUgtHZI7BcksLSczQbxNDvRu6LNKqGJGvcp99k cWL1Z6BsgtvxWKkOmy1vB+2aPfDiQQiMCCLAqXwHiNDZhSkwmGsJ7KHMWgF/dRVDnsl6aOQZ jAcBMpUZxzA/bv4nY2PylVdqJWp9N7x86TF9sda1zRZiyUwy83eFTDNzefYPtc4MLppcaD4g Wt8U6T2ffQfCWVzDirhg4WmDH3MybDItjkSB2/+pgGOS4lgtEBMHzAGQqQ+5PojTHRyqu9Jc O59oIGrTaOtKV9nDeDtzNaQZgygJItJi9GoAl68AmIHxpS1rZUNV6X8ydFrEweFdRTVWhUEL 70Cnx84YBojXv01LYBSZaq18K8cERPLaIrUD2go+2ffjdE9ejvYDhNBllY+ufvRizIjQA1uC OdktVAN6auQob94kOOsWpoMSrzHHvOvVW/kbokmKzaLtcs9+nJoL+vPi2AyzbaoQASVZYOGW pE3daA0F5FJfcPZKCwd5wdnmT3dU1IRUxa5vMmgjP20lkfP8tCPtvZv2mmI2Nw5SaXNY4gVu WQrvkV2in+TnGqgEIwUrLVbx9G6PSYZZs07czhO+Q1iVuKdAwjL/AYK0Us9v50acIzbl5CWw ZGj3wjGCA6EwggOdAgEBMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6 Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEh MB8GCSqGSIb3DQEJARYSc3VwcG9ydEBjYWNlcnQub3JnAgMPYFQwCQYFKw4DAhoFAKCCAfUw GAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTQxMDIyMTEyMjMz WjAjBgkqhkiG9w0BCQQxFgQUtE/vVy/nCeDRfm9aApISQWW7bFwwbAYJKoZIhvcNAQkPMV8w XTALBglghkgBZQMEASowCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIA gDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDCBkQYJKwYBBAGCNxAE MYGDMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0 Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ ARYSc3VwcG9ydEBjYWNlcnQub3JnAgMPYFQwgZMGCyqGSIb3DQEJEAILMYGDoIGAMHkxEDAO BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UE AxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYSc3VwcG9ydEBj YWNlcnQub3JnAgMPYFQwDQYJKoZIhvcNAQEBBQAEggEAgu6Aw8cnQNLq/5qVnoKrrecJ5Htn h8qsdkHdtqlEn4SJHUHuNbM8ilzBamRZb286dF1a82Ck/fdAe9Ag8GlhOMFy+2LwnGKY3k6K bX1aJ0AA44o2r6SU7xqmG99Qm9JzNyntY3kD0/WKewCXF+6w5s6zmmvtWOSEdDs68WrD3WYE afR0gAQssqPa2XPsV92sfcuz0eR6Z1gAfgNDSY2Zvc0rzLKuIVPt2L9FlFd09zyz4GEGKwff A+5ocKycVXdDiiYgPUUBWOGMNiB6DtuyxKtKqV/vUfdVPvsjHlmHvl9PVW/uP8fMoFXU1CGU BMhXVyJd7y2z5XREsR39y3SAkAAAAAAAAA== --------------ms050908090104020300030402--