lix -

Age	Commit message (Collapse)	Author
2012-03-26	Make the garbage collector more concurrent	Eelco Dolstra
	Make the garbage collector more concurrent by deleting valid paths outside the region where we're holding the global GC lock. This should greatly reduce the time during which new builds are blocked, since the deletion accounts for the vast majority of the time spent in the GC. To ensure that this is safe, the valid paths are invalidated and renamed to some arbitrary path while we're holding the lock. This ensures that we when we finally delete the path, it's not a (newly) valid or locked path.
2012-03-26	Remove the --max-links GC option	Eelco Dolstra
	We don't need this anymore now that current filesystems support more than 32,000 files in a directory.
2012-03-13	Ensure that Perl processes delete their entry in the temproots directory	Eelco Dolstra
	By moving the destructor object to libstore.so, it's also run when download-using-manifests and nix-prefetch-url exit. This prevents them from cluttering /nix/var/nix/temproots with stale files.
2012-03-05	Set the close-on-exec flag on file descriptors	Eelco Dolstra

2012-02-15	Don't use deletePath() to delete a single file	Eelco Dolstra

2012-02-09	Use data() instead of c_str() where appropriate	Eelco Dolstra

2011-12-30	* Move topoSortPaths() out of gc.cc.	Eelco Dolstra

2011-12-30	* Reject a build if there is a cycle among the outputs. This is	Eelco Dolstra
	necessary because existing code assumes that the references graph is acyclic.
2011-12-22	* Oops.	Eelco Dolstra

2011-12-22	* In the garbage collector, delete invalid paths before deleting	Eelco Dolstra
	unreachable paths. This matters when using --max-freed etc.: unreachable paths could become reachable again, so it's nicer to keep them if there is "real" garbage to be deleted. Also, don't use readDirectory() but read the Nix store and delete invalid paths in parallel. This reduces GC latency on very large Nix stores.
2011-12-22	* Drop unnecessary call to canonPath() (nixStore is already canonical).	Eelco Dolstra

2011-08-31	* Eliminate all uses of the global variable ‘store’ from libstore.	Eelco Dolstra
	This should also fix: nix-instantiate: ./../boost/shared_ptr.hpp:254: T* boost::shared_ptr<T>::operator->() const [with T = nix::StoreAPI]: Assertion `px != 0' failed. which was caused by hashDerivationModulo() calling the ‘store’ object (during store upgrades) before openStore() assigned it.
2010-10-14	* Wrap deleteFromStore() in a transaction. Otherwise there might be a	Eelco Dolstra
	race with other processes that add new referrers to a path, resulting in the garbage collector crashing with "foreign key constraint failed". (Nix/4) * Make --gc --print-dead etc. interruptible.
2010-08-31	`nix-store --verify' improvements:	Eelco Dolstra
	* If a path has disappeared, check its referrers first, and don't try to invalidate paths that have valid referrers. Otherwise we get a foreign key constraint violation. * Read the whole Nix store directory instead of statting each valid path, which is slower. * Acquire the global GC lock.
2010-08-30	* When using the build hook, distinguish between the stderr of the	Eelco Dolstra
	hook script proper, and the stdout/stderr of the builder. Only the latter should be saved in /nix/var/log/nix/drvs. * Allow the verbosity to be set through an option. * Added a flag --quiet to lower the verbosity level.
2010-08-30	* Disable the GC reachability check for now (when creating new roots),	Eelco Dolstra
	as it's hopelessly inefficient.
2010-03-08	* Set `gc-keep-outputs' or `gc-keep-derivations' to false with	Eelco Dolstra
	`--delete --ignore-liveness'.
2010-02-22	* Get derivation outputs from the database instead of the .drv file,	Eelco Dolstra
	which requires more I/O.
2010-02-22	* Revert r19650 (implement gc-keep-outputs by looking for derivations	Eelco Dolstra
	with the same name as the output) and instead use the DerivationOutputs table in the database, which is the correct way to to do things.
2010-02-02	* Remove most Cygwin-specific code. Cygwin 1.7 implements advisory	Eelco Dolstra
	POSIX locks, and simulates Unix-style file deletion semantics sufficiently. Note that this means that Nix won't work on Cygwin 1.5 anymore.
2010-01-25	* Make the garbage collector do the right thing when `gc-keep-outputs'	Eelco Dolstra
	is enabled by not depending on the deriver.
2009-11-24	* Randomise the order in which we delete entries to make the collector	Eelco Dolstra
	less biased towards deleting paths that come alphabetically first (e.g. /nix/store/000...). This matters when using --max-freed etc.
2009-11-23	(no commit message)	Eelco Dolstra

2009-11-23	* `nix-store --gc --print-roots': also print the path of the actual	Eelco Dolstra
	root symlink, not just its target. E.g.: /nix/var/nix/profiles/system-99-link -> /nix/store/76kwf88657nq7wgk1hx3l1z5q91zb9wd-system
2009-11-23	* Made the garbage collector a lot faster. It no longer computes the	Eelco Dolstra
	complete set of live and dead paths before starting the actual deletion, but determines liveness on demand. I.e. for any path in the store, it first tries to delete all the referrers, and then the path itself. This means that the collector can start deleting paths almost immediately.
2009-11-20	* Remove the --use-atime / --max-atime garbage collector flags. Many	Eelco Dolstra
	(Linux) machines no longer maintain the atime because it's too expensive, and on the machines where --use-atime is useful (like the buildfarm), reading the atimes on the entire Nix store takes way too much time to make it practical.
2009-04-21	* Use foreach in a lot of places.	Eelco Dolstra

2009-03-26	* Don't use ULLONG_MAX in maxFreed - use 0 to mean "no limit".	Eelco Dolstra
	18446744073709551615ULL breaks on GCC 3.3.6 (`integer constant is too large for "long" type').
2008-12-12	* Put chroots in the Nix store. This ensures that we can create hard	Eelco Dolstra
	links to the inputs.
2008-12-12	* Simplify deleting .lock files in /nix/store: just don't delete them	Eelco Dolstra
	if they belong a path that's currently being built. This gets rid of some Cygwin-specific code.
2008-09-17	* GC option `--max-atime' that specifies an upper limit to the last	Eelco Dolstra
	accessed time of paths that may be deleted. Anything more recently used won't be deleted. The time is specified in time_t, e.g. seconds since 1970-01-01 00:00:00 UTC; use `date +%s' to convert to time_t from the command line. Example: to delete everything that hasn't been used in the last two months: $ nix-store --gc -v --max-atime $(date +%s -d "2 months ago")
2008-09-17	* Typo.	Eelco Dolstra

2008-09-17	* Some refactoring. Better output with `-v' for --use-atime.	Eelco Dolstra

2008-09-17	* Garbage collector: added an option `--use-atime' to delete paths in	Eelco Dolstra
	order of ascending last access time. This is useful in conjunction with --max-freed or --max-links to prefer deleting non-recently used garbage, which is good (especially in the build farm) since garbage may become live again. The code could easily be modified to accept other criteria for ordering garbage by changing the comparison operator used by the priority queue in collectGarbage().
2008-08-14	* Increase the sleep periods a bit to make the test less likely to	Eelco Dolstra
	fail on slow machines. Of course it would be better if this test wasn't timing dependent...
2008-06-18	* Garbage collector: option `--max-freed' to stop after at least N	Eelco Dolstra
	bytes have been freed, `--max-links' to stop when the Nix store directory has fewer than N hard links (the latter being important for very large Nix stores on filesystems with a 32000 subdirectories limit).
2008-06-18	* Some refactoring: put the GC options / results in separate structs.	Eelco Dolstra
	* The garbage collector now also prints the number of blocks freed.
2008-06-14	* Note.	Eelco Dolstra

2008-06-13	* Garbage collector: don't do a complete topological sort of the Nix	Eelco Dolstra
	store under the reference relation, since that means that the garbage collector will need a long time to start deleting paths. Instead just delete the referrers of a path first.
2008-06-13	* Print some progress info during the early GC stages.	Eelco Dolstra

2008-06-09	* Merged the no-bdb branch (-r10900:HEAD	Eelco Dolstra
	https://svn.nixos.org/repos/nix/nix/branches/no-bdb).
2007-11-29	* nix-env -e: support uninstalling by path, so that one can say	Eelco Dolstra
	$ nix-env -e $(which firefox) or $ nix-env -e /nix/store/nywzlygrkfcgz7dfmhm5xixlx1l0m60v-pan-0.132 * nix-env -i: if an argument contains a slash anywhere, treat it as a path and follow it through symlinks into the Nix store. This allows things like $ nix-build -A firefox $ nix-env -i ./result * nix-env -q/-i/-e: don't complain when the `' selector doesn't match anything. In particular, `nix-env -q \' doesn't fail anymore on an empty profile.
2007-11-15	* Don't need gc.hh.	Eelco Dolstra

2007-11-15	Added possibility to specify garbage collection levels for store paths; so ↵	Michael Raskin
	packages can share intermediate results of compilation and GC will collect it automatically while never touching tarballs, for example.
2007-08-28	* PathLocks::lockPaths: don't allow reacquiring a lock we already	Eelco Dolstra
	hold.
2007-08-12	* Get rid of the substitutes database table (NIX-47). Instead, if we	Eelco Dolstra
	need any info on substitutable paths, we just call the substituters (such as download-using-manifests.pl) directly. This means that it's no longer necessary for nix-pull to register substitutes or for nix-channel to clear them, which makes those operations much faster (NIX-95). Also, we don't have to worry about keeping nix-pull manifests (in /nix/var/nix/manifests) and the database in sync with each other. The downside is that there is some overhead in calling an external program to get the substitutes info. For instance, "nix-env -qas" takes a bit longer. Abolishing the substitutes table also makes the logic in local-store.cc simpler, as we don't need to store info for invalid paths. On the downside, you cannot do things like "nix-store -qR" on a substitutable but invalid path (but nobody did that anyway). * Never catch interrupts (the Interrupted exception).
2007-06-12	* Support queryDeriver() in multi-user installations.	Eelco Dolstra

2007-06-11	* Check against creation of GC roots in the store. Those roots don't	Eelco Dolstra
	work, because findRoots() stops when it encounters a symlink to the store. And of course the store is supposed to be read-only.
2007-03-19	* Undocumented option `gc-check-reachability' to allow reachability	Eelco Dolstra
	checking to be turned off on machines with way too many roots.
2007-02-21	* `nix-store -qR' and friends: print the paths sorted topologically	Eelco Dolstra
	under the references relation. This is useful for commands that want to copy paths to another Nix store in the right order.