Bug#634145: apt-cacher-ng: Please keep files by number of versions instead of date
#include hallo.h * Helge Kreutzmann [Sun, Jul 17 2011, 10:45:19AM]: Since apt-proxy was removed from Debian I currently migrate to apt-cacher-ng. As far as I can see, apt-cacher-ng deletes files by date (i.e. which are older than x days). Sorry, that is not the case. First, not simply by date but after some grace period after the files became no longer DOWNLOADABLE. Second, if you say older than then you should mention which time points you compare (creation? storage time?) otherwise I don't know what you mean. In fact, it deletes them after X days after they became no longer downloadable. As long as the index files (like Packages.*) are good and can be checked by download lookups, the files referenced therein will stay in the cache. The potential pitfall in this scheme is the renaming of stable to oldstable. If nobody ever downloaded from oldstable then the server won't know about it. But when it was used once before or within the grace period then the problem will naturally disappear. Now, does this provide a sufficient solution to your needs or do we still need version based tracking? Regards, Eduard. It would be great if apt-cacher-ng would instead (configurable) delete files by version, i.e. the latest n versions remain in the cache. This has several benefits: a) If a deb is installed much later, no redownload is necessary b) If an upgrade fails and the package releases seldomly, then the recent version is still there even though it was downloaded much earlier c) If a package is removed from Debian it is still in the cache, possibly for years, so if a later reference is needed (e.g. a (temporary) reinstall is necessary) then it is still present It would be great if the kind of processing (by date or by package version) could become configurable then. -- Vorsicht im Vertrauen ist allerdings notwendig; aber noch notwendiger Vorsicht im Mißtrauen. -- Josef Eötvös -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#634145: apt-cacher-ng: Please keep files by number of versions instead of date
Hello Eduard, On Sun, Jul 17, 2011 at 11:45:47AM +0200, Eduard Bloch wrote: #include hallo.h * Helge Kreutzmann [Sun, Jul 17 2011, 10:45:19AM]: In fact, it deletes them after X days after they became no longer downloadable. As long as the index files (like Packages.*) are good and can be checked by download lookups, the files referenced therein will stay in the cache. Thanks for your explanation. The potential pitfall in this scheme is the renaming of stable to oldstable. If nobody ever downloaded from oldstable then the server won't know about it. But when it was used once before or within the grace period then the problem will naturally disappear. Now, does this provide a sufficient solution to your needs or do we still need version based tracking? apt-proxy worked differently. Once a new version of a package was downloaded, the proxy would check if there are more than N versions already in the cache (e.g. N=4). If yes, then the lowest version was removed (if it was the fith version, say). If no, nothing happended. This has (for me) two advantages: First, if something breaks, I always have the N latest version in the cache and can go back (or check if it is already present in the older version) and b) if some package gets removed from Debian, then it still remains in the cache. Of course, these are the *added* use cases, beside the caching aspect. After filing the bug I checked if other package proxies/caches implemented such a scheme, but it seems this was a unique feature of apt-proxy which was removed from Debian. Therefore if such a scheme would become possible with apt-cacher-ng, this would be great. Otherwise I perfectly understand if this is a use case you / your upstream considers not worth pursuing. Greetings Helge -- Dr. Helge Kreutzmann deb...@helgefjell.de Dipl.-Phys. http://www.helgefjell.de/debian.php 64bit GNU powered gpg signed mail preferred Help keep free software libre: http://www.ffii.de/ signature.asc Description: Digital signature
Bug#634145: apt-cacher-ng: Please keep files by number of versions instead of date
Package: apt-cacher-ng Version: 0.6.3-1 Severity: wishlist Since apt-proxy was removed from Debian I currently migrate to apt-cacher-ng. As far as I can see, apt-cacher-ng deletes files by date (i.e. which are older than x days). It would be great if apt-cacher-ng would instead (configurable) delete files by version, i.e. the latest n versions remain in the cache. This has several benefits: a) If a deb is installed much later, no redownload is necessary b) If an upgrade fails and the package releases seldomly, then the recent version is still there even though it was downloaded much earlier c) If a package is removed from Debian it is still in the cache, possibly for years, so if a later reference is needed (e.g. a (temporary) reinstall is necessary) then it is still present It would be great if the kind of processing (by date or by package version) could become configurable then. -- System Information: Debian Release: wheezy/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 2.6.39-2-amd64 (SMP w/6 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- Dr. Helge Kreutzmann deb...@helgefjell.de Dipl.-Phys. http://www.helgefjell.de/debian.php 64bit GNU powered gpg signed mail preferred Help keep free software libre: http://www.ffii.de/ signature.asc Description: Digital signature
