Date: Tue, 01 Feb 2005 14:30:49 +0300 From: Deomid Ryabkov <myself@rojer.pp.ru> To: freebsd-hackers@freebsd.org Subject: Question: tracking filesystem changes? Message-ID: <41FF6869.5060709@rojer.pp.ru>
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This is a cryptographically signed message in MIME format. --------------ms050205090609040809070802 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit We need to keep track of changes to filesystem containing large number of files. The number of files is huge (to the point where walking the directory structure becomes impractical), but the amount of changes is small. However, there is no single source of these changes: it might be a script, or a user editing the file, whatever... So the most appropriate point of tracking them seems to be the kernel itself. This could be a custom filesystem wrapper for UFS that would report name of the file/directory being changed. The change could be later propagated to a group of mirrors. Does it make sense? Are there other solutions for this problem? Distributed filesystems were considered, but we find them too heavy for the purpose, which is to keep a group of dumb, read-only mirrors in sync with the master. -- Deomid Ryabkov aka Rojer myself@rojer.pp.ru rojer@sysadmins.ru ICQ: 8025844 --------------ms050205090609040809070802 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJIzCC AuwwggJVoAMCAQICAwwKdjANBgkqhkiG9w0BAQQFADBiMQswCQYDVQQGEwJaQTElMCMGA1UE ChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNv bmFsIEZyZWVtYWlsIElzc3VpbmcgQ0EwHhcNMDQwMzMxMjIxODA5WhcNMDUwMzMxMjIxODA5 WjBfMRAwDgYDVQQEEwdSeWFia292MQ8wDQYDVQQqEwZEZW9taWQxFzAVBgNVBAMTDkRlb21p ZCBSeWFia292MSEwHwYJKoZIhvcNAQkBFhJteXNlbGZAcm9qZXIucHAucnUwggEiMA0GCSqG SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDBxXgFP/1lZDqp0dzUDzR5IBb7aKki6TD+HMMkRjtP IOcaNHsfoDer9RFrFICoxNQZF86iopYFVYr7msgB9y2dKZTRQQoOA72lFrOyH3sgrztx/3LL axEsihA2cxcrglrIgPEm6FF2aabbKVpSdeslMCDPBr0auAm0QLo8ch9c5j0vuQUBrs8TKU6f 6YZLNO2Sk/fPZP2kfJEkXyZhkU6wq3ER1CHq2qgfNpW2Ni7Kuv/eYI/CV1BGgm37ZPubOyxI LNiRUGT0pv0wocrCIehKqoI1uFPZgGS0ANYTqPJQSdjlSzMGQJjT510PNDJnDfKOvLhcadD+ 6gSL/ovNM/LPAgMBAAGjLzAtMB0GA1UdEQQWMBSBEm15c2VsZkByb2plci5wcC5ydTAMBgNV HRMBAf8EAjAAMA0GCSqGSIb3DQEBBAUAA4GBACunC6DhFX4I6Nvdy/UevjSd3VmKWPRmqwoR l0RXvuI/JVyPO9KHGqxCMpRu7ArJz7d8ShPVs5kynysrB+Nm6/fwWjeaW21+gViojeO9gGP6 Np/LeMIqkqSYMoElq7Feqh/3qp7a/UxuofFtAW9V/2tRunxaPo4/WOxcdcmdcC86MIIC7DCC AlWgAwIBAgIDDAp2MA0GCSqGSIb3DQEBBAUAMGIxCzAJBgNVBAYTAlpBMSUwIwYDVQQKExxU aGF3dGUgQ29uc3VsdGluZyAoUHR5KSBMdGQuMSwwKgYDVQQDEyNUaGF3dGUgUGVyc29uYWwg RnJlZW1haWwgSXNzdWluZyBDQTAeFw0wNDAzMzEyMjE4MDlaFw0wNTAzMzEyMjE4MDlaMF8x EDAOBgNVBAQTB1J5YWJrb3YxDzANBgNVBCoTBkRlb21pZDEXMBUGA1UEAxMORGVvbWlkIFJ5 YWJrb3YxITAfBgkqhkiG9w0BCQEWEm15c2VsZkByb2plci5wcC5ydTCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMHFeAU//WVkOqnR3NQPNHkgFvtoqSLpMP4cwyRGO08g5xo0 ex+gN6v1EWsUgKjE1BkXzqKilgVVivuayAH3LZ0plNFBCg4DvaUWs7IfeyCvO3H/cstrESyK EDZzFyuCWsiA8SboUXZpptspWlJ16yUwIM8GvRq4CbRAujxyH1zmPS+5BQGuzxMpTp/phks0 7ZKT989k/aR8kSRfJmGRTrCrcRHUIeraqB82lbY2Lsq6/95gj8JXUEaCbftk+5s7LEgs2JFQ ZPSm/TChysIh6EqqgjW4U9mAZLQA1hOo8lBJ2OVLMwZAmNPnXQ80MmcN8o68uFxp0P7qBIv+ i80z8s8CAwEAAaMvMC0wHQYDVR0RBBYwFIESbXlzZWxmQHJvamVyLnBwLnJ1MAwGA1UdEwEB /wQCMAAwDQYJKoZIhvcNAQEEBQADgYEAK6cLoOEVfgjo293L9R6+NJ3dWYpY9GarChGXRFe+ 4j8lXI870ocarEIylG7sCsnPt3xKE9WzmTKfKysH42br9/BaN5pbbX6BWKiN472AY/o2n8t4 wiqSpJgygSWrsV6qH/eqntr9TG6h8W0Bb1X/a1G6fFo+jj9Y7Fx1yZ1wLzowggM/MIICqKAD AgECAgENMA0GCSqGSIb3DQEBBQUAMIHRMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVy biBDYXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xGjAYBgNVBAoTEVRoYXd0ZSBDb25zdWx0aW5n MSgwJgYDVQQLEx9DZXJ0aWZpY2F0aW9uIFNlcnZpY2VzIERpdmlzaW9uMSQwIgYDVQQDExtU aGF3dGUgUGVyc29uYWwgRnJlZW1haWwgQ0ExKzApBgkqhkiG9w0BCQEWHHBlcnNvbmFsLWZy ZWVtYWlsQHRoYXd0ZS5jb20wHhcNMDMwNzE3MDAwMDAwWhcNMTMwNzE2MjM1OTU5WjBiMQsw CQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoG A1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0EwgZ8wDQYJKoZIhvcN AQEBBQADgY0AMIGJAoGBAMSmPFVzVftOucqZWh5owHUEcJ3f6f+jHuy9zfVb8hp2vX8MOmHy v1HOAdTlUAow1wJjWiyJFXCO3cnwK4Vaqj9xVsuvPAsH5/EfkTYkKhPPK9Xzgnc9A74r/rsY Pge/QIACZNenprufZdHFKlSFD0gEf6e20TxhBEAeZBlyYLf7AgMBAAGjgZQwgZEwEgYDVR0T AQH/BAgwBgEB/wIBADBDBgNVHR8EPDA6MDigNqA0hjJodHRwOi8vY3JsLnRoYXd0ZS5jb20v VGhhd3RlUGVyc29uYWxGcmVlbWFpbENBLmNybDALBgNVHQ8EBAMCAQYwKQYDVR0RBCIwIKQe MBwxGjAYBgNVBAMTEVByaXZhdGVMYWJlbDItMTM4MA0GCSqGSIb3DQEBBQUAA4GBAEiM0VCD 6gsuzA2jZqxnD3+vrL7CF6FDlpSdf0whuPg2H6otnzYvwPQcUCCTcDz9reFhYsPZOhl+hLGZ GwDFGguCdJ4lUJRix9sncVcljd2pnDmOjCBPZV+V2vf3h9bGCE6u9uo05RAaWzVNd+NWIXiC 3CEZNd4ksdMdRv9dX2VPMYIDOzCCAzcCAQEwaTBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMc VGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFs IEZyZWVtYWlsIElzc3VpbmcgQ0ECAwwKdjAJBgUrDgMCGgUAoIIBpzAYBgkqhkiG9w0BCQMx CwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0wNTAyMDExMTMwNTBaMCMGCSqGSIb3DQEJ BDEWBBSnlMJ0O4S+lg4ng/7xcHO9qH7M2jBSBgkqhkiG9w0BCQ8xRTBDMAoGCCqGSIb3DQMH MA4GCCqGSIb3DQMCAgIAgDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIB KDB4BgkrBgEEAYI3EAQxazBpMGIxCzAJBgNVBAYTAlpBMSUwIwYDVQQKExxUaGF3dGUgQ29u c3VsdGluZyAoUHR5KSBMdGQuMSwwKgYDVQQDEyNUaGF3dGUgUGVyc29uYWwgRnJlZW1haWwg SXNzdWluZyBDQQIDDAp2MHoGCyqGSIb3DQEJEAILMWugaTBiMQswCQYDVQQGEwJaQTElMCMG A1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBl cnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0ECAwwKdjANBgkqhkiG9w0BAQEFAASCAQAaP/SN fVoa2UvjaAonBgt2LoTUCRXizYVa7WM00UMOfTVM3oN9O3NTTVdv7UCnKq5+AylPbi0uGHIm pB9vIOXlkZh0UGRdRy45Wm38+V+bH0vqtDajTHt0j2uD8h5Pz95FwOsPrVkKImZCVnI0DXmg T7yvJzscE7bSINlTkrdO9rJ/eArh3SgugfBWUh7LISgAMOZH46Ph/kyrmnF3mkoVmF+8iGQG tNCFPEUXg7mexUlQ+d1/GhDACB/9sr2TnPOK6Gn4kFXJIu79w4QeFxMH/Bv/lAn5J9HYHjwk 9z9gKlR4sPwdlthuH1Wdk1mlB4z7DtiDPCv3hLTVpoMWY6nxAAAAAAAA --------------ms050205090609040809070802--
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