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csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
csync talk at SambaXP 2009
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csync talk at SambaXP 2009

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Talk about csync a user level bidirectional file synchronizer especially for roaming home directories.

Talk about csync a user level bidirectional file synchronizer especially for roaming home directories.

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  1. Terminology and Concept Roaming Home Directories Plans for the future Roaming Home Directories Andreas Schneider <mail@cynapses.org> csync 23rd April 2009 Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  2. Terminology and Concept Roaming Home Directories Plans for the future Roaming Home Directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  3. Terminology and Concept Roaming Home Directories Plans for the future Terminology csync - roaming home directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  4. Terminology and Concept Roaming Home Directories Plans for the future Terminology Roaming Home Directories Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  5. Terminology and Concept Roaming Home Directories Plans for the future Terminology Roaming Home Directories We don’t talk about Profiles here This is about synchronizing files! No merging of content (not yet?) Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  6. Terminology and Concept Roaming Home Directories Plans for the future Terminology What is a replica? A tree or subtree of a filesystems This could be local or remote Changes are often made independently and as a result they do not contain the same information. Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  7. Terminology and Concept Roaming Home Directories Plans for the future Terminology What is a conflict? A path is conflicting if it fulfills the following conditions: 1 it has been updated on one replica 2 it or any of its decendants has been updated on the other replica too, and 3 its contents are not identical. Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  8. Terminology and Concept Roaming Home Directories Plans for the future Concept csync - roaming home directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  9. Terminology and Concept Roaming Home Directories Plans for the future Concept What do we need? We need a bidirectional file synchronizer working with metadata (stat()) working with a metadata status database client only (no specific daemon needed) Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  10. Terminology and Concept Roaming Home Directories Plans for the future Concept What do we have? csync simple file synchronizer which: collects and checks metadata (update detection) compares metadata (reconciliation) copy the files (propagation) Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  11. Terminology and Concept Roaming Home Directories Plans for the future Concept How do we detect updates? We compare the modification time of the file with the db entry. no entry = new file newer modification time = file changed equal modification time = no changes ... Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  12. Terminology and Concept Roaming Home Directories Plans for the future Concept What do we do with conflicts? The Merge Algorithm doesn’t need any user interaction it is used by Microsoft for Roaming Profiles if it detects a conflict, it will use the most recent file and overwrite the file on the other replica Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  13. Terminology and Concept Roaming Home Directories Plans for the future Concept Which protocols are supported? SMB: using Sambas libsmbclient SFTP: using libssh (will be in 0.43) Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  14. Terminology and Concept Roaming Home Directories Plans for the future Concept For developers csync uses: a red-black tree to store all information in memory a sqlite3 database to store all the metadata for the next synchronization a virtual IO plugin system to support different protocols a unit testing framework Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  15. Terminology and Concept Roaming Home Directories Plans for the future PAM csync - roaming home directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  16. Terminology and Concept Roaming Home Directories Plans for the future PAM Pluggable Authentication Module Separates the tasks of authentication into four independent management groups: authentication management password management account management session management Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  17. Terminology and Concept Roaming Home Directories Plans for the future pam csync csync - roaming home directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  18. Terminology and Concept Roaming Home Directories Plans for the future pam csync pam csync does ... authentication management to get the password and pass it to session management to synchronize the files Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  19. Terminology and Concept Roaming Home Directories Plans for the future pam csync pam csync features pam winbind support to get the Profile directory from the ADS kerberos suppport exclude users Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  20. Terminology and Concept Roaming Home Directories Plans for the future Features users or developers asked for csync - roaming home directories 1 Terminology and Concept Terminology Concept 2 Roaming Home Directories PAM pam csync 3 Plans for the future Features users or developers asked for Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  21. Terminology and Concept Roaming Home Directories Plans for the future Features users or developers asked for GUI support What’s needed? A conflict algorithm Callback that for the GUI to display and modify conflicts Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  22. Terminology and Concept Roaming Home Directories Plans for the future Features users or developers asked for More protocols WEBDAV: maybe possible with libneon RSYNC: maybe we can talk to rsync own daemon with mimetype support to merge special contents Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories
  23. Terminology and Concept Roaming Home Directories Plans for the future Features users or developers asked for Questions & Answers Interested in development? Poject page: http://www.csync.org/ Andreas Schneider <mail@cynapses.org> csync Roaming Home Directories

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