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View Code? Open in Web Editor NEWObnam, a backup system (forked from liw.fi)
Home Page: http://liw.fi/obnam/
License: GNU General Public License v3.0
Obnam, a backup system (forked from liw.fi)
Home Page: http://liw.fi/obnam/
License: GNU General Public License v3.0
Obnam, a backup program ======================= Obnam is a backup program. Home page --------- The Obnam home page is at <http://liw.fi/obnam/>, see there for more information. Installation ------------ The source tree contains packaging for Debian. Run `debuild -us -uc -i.git` to build an installation package. On other systems, using the `setup.py` file should work: run "python setup.py --help" for advice. If not, please report a bug. (I've only tested `setup.py` enough for to build the Debian package.) You need Python 2.6 or 2.7 (Python 3 is not yet supported). You also need to install my Python B-tree library, and some of my other libraries and tools, which you can get from: * <http://liw.fi/larch/> * <http://liw.fi/ttystatus/> * <http://liw.fi/coverage-test-runner/> (for automatic tests) * <http://liw.fi/tracing/> * <http://liw.fi/cliapp/> * <http://liw.fi/genbackupdata/> * <http://liw.fi/summain/> * <http://liw.fi/cmdtest/> * <http://liw.fi/seivot/> (for benchmarks) You also need third party libraries: * paramiko: <http://www.lag.net/paramiko/> See debian/control for the full set of build dependencies and runtime dependencies on a Debian system. (That set actually gets tested. The above list is maintained manually and may get out of date from time to time.) Use --- To get a quick help summary of options: ./obnam --help To make a backup: ./obnam backup --repository /tmp/mybackup $HOME For more information, see the manual page: man -l obnam.1 Hacking ------- Obnam source code is stored in git for version control purposes; you can get a copy as follows: git clone git://git.liw.fi/obnam The 'master' branch is the main development one. Any bug fixes and features should be developed in a dedicated branch, which gets merged to master when the changes are done and considered good. To build and run automatic tests: ./check ./check --fast # unit tests only, no black box tests ./check --network # requires ssh access to localhost `check` is a wrapper around `python setup.py`, but since using that takes several steps, the script makes things easier. You need my CoverageTestRunner to run tests, see above for where to get it. A couple of scripts exist to run benchmarks and profiles: ./metadata-speed 10000 ./obnam-benchmark --size=1m/100k --results /tmp/benchmark-results viewprof /tmp/benchmark-results/*/*backup-0.prof seivots-summary /tmp/benchmark-results/*/*.seivot | less -S There are two kinds of results: Python profiling output, and `.seivot` files. For the former, `viewprof` is a little helper script I wrote, around the Python pstats module. You can use your own, or get mine from extrautils (<http://liw.fi/extrautils/>). Running the benchmarks under profiling makes them a little slower (typically around 10% for me, when I've compared), but that's OK: the absolute numbers of the benchmarks are less important than the relative ones. It's nice to be able to look at the profiler output, if a benchmark is surprisingly slow, without having to re-run it. `seivots-summary` is a tool to display summaries of the measurements made during a benchmark run. `seivot` is the tool that makes the measurements. I typically save a number of benchmark results, so that I can see how my changes affect performance over time. If you make any changes, I welcome patches, either as plain diffs, `git format-patch --cover-letter` mails, or public repositories I can merge from. The code layout is roughly like this: obnamlib/ # all the real code obnamlib/plugins/ # the plugin code (see pluginmgr.py) obnam # script to invoke obnam _obnammodule.c # wrapper around some system calls In obnamlib, every code module has a corresponding test module, and "make check" uses CoverageTestRunner to run them pairwise. For each pair, test coverage must be 100% or the test will fail. Mark statements that should not be included in coverage test with "# pragma: no cover", if you really, really can't write a test. without-tests lists modules that have no test modules. If you want to make a new release of Obnam, I recommend following my release checklist: <http://liw.fi/obnam/release/>. Feedback -------- I welcome bug fixes, enhancements, bug reports, suggestions, requests, and other feedback. I prefer e-mail the mailing list: see <http://vlists.pepperfish.net/cgi-bin/mailman/listinfo/obnam-flarn.net> for instructions. It would be helpful if you can run `make clean check` before submitting a patch, but it is not strictly required. Legal stuff ----------- Most of the code is written by Lars Wirzenius. (Please provide patches so that can change.) The code is covered by the GNU General Public License, version 3 or later. Copyright 2010-2013 Lars Wirzenius This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
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