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Obnam NEWS
==========
This file summarizes changes between releases of Obnam.
Version 0.13, released 2010-07-13; an ALPHA release
----------------------------------------------------
* Bug fix: a mistake in 0.12 caused checkpoints to happen after each
file after the first checkpoint. Now they happen at the right intervals
again.
* Upload speed is now displayed during backups.
* Obnam now tells the kernel that it shouldn't cache data it reads or
writes. It is not likely that data being backed up is going to be
needed again any time soon, so there's no point in caching it.
(The posix_fadvise call is used for this.)
* New --lru-size option sets size of LRU cache for nodes in memory.
The obnam default is large enough to suit large backups. This uses more
memory, but is faster than btree's small default of 100.
Version 0.12, released 2010-07-11; an ALPHA release
----------------------------------------------------
* NOTE: This version makes incompatible changes to the way data is stored
on-disk. Backups made with older versions are NOT supported. Sorry.
* The run-benchmark script has dropped some smaller sizes (they're too
fast to be interesting), and adds a 10 GiB test size.
* Various speed optimizations. Most importantly, the way file metadata
(results of lstat(2)) are encoded has changed. This is the incompatible
change from above. It's much faster now, though.
* Preliminary support for using SFTP for the backup store added. Hasn't
been used much yet, so might well be very buggy.
Version 0.11, released 2010-07-05; an ALPHA release
----------------------------------------------------
* Speed optimizations:
- chunk identifiers are now sequential, except for the first one, or
when there's a collision
- chunks are now stored in a more sensible directory hierarchy (instead
of one per directory, on average)
- adding files to a directory in the backup store is now faster
- only store a file's metadata that if it is changed
* New --exclude=regexp option to exclude files based on pathnames
* Obnam now makes checkpoints during backups. If a backup is aborted
in the middle and then re-started, it will continue from the latest
checkpoint rather than from the beginning of the previous backup run.
- New option --checkpoint to set the interval between checkpoints.
Defaults to 1 GiB.
* Options for various B-tree settings. This is mostly useful for finding
the optimal set of defaults, but may be useful in other situations for
some people.
- New options --chunk-group-size, --chunk-size, --node-size,
--upload-queue-size.
* Somewhat better progress reporting during backups.
Version 0.10, released 2010-06-29; an ALPHA release
---------------------------------------------------
* Rewritten from scratch.
* Old NEWS file entries removed (see bzr if you're interested).
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