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Approx saves time and network bandwidth if you need to install or upgrade .deb packages for a number of machines on a local network. Each package is downloaded from a remote site only once, regardless of how many local clients install it. The approx cache typically requires a few gigabytes of disk space.
Approx also simplifies the administration of client machines: repository locations need only be changed in approx's configuration file, not in every client's /etc/apt/sources.list file.
Approx can be used as a replacement for apt-proxy, with no need to modify clients' /etc/apt/sources.list files, or as an alternative to apt-cacher.
Concurrency control issues in approx Eric Cooper <firstname.lastname@example.org> June 2008 The priorities for dealing with concurrency in approx are: 1. ensure correctness (no corrupt files delivered to clients or stored in the cache) 2. maintain good performance (minimize delays due to serialization, minimize number of downloads from remote repositories) There are two sources of potential confli more»
approx (5.0-1) unstable; urgency=low The $interval parameter is back, and approx once again caches Release files for up to $interval minutes. "File not found" responses are also cached now (in the form of empty files with zero permissions). The approx-update program is no longer necessary and has been removed. Application of pdiffs is now done in the background so clients do not h more»
Changing the location of the approx cache Use the $cache parameter in /etc/approx.conf. Make sure the specified location exists and is owned by the approx user and group. Use a subdirectory for the cache, not a top-level filesystem with a lost+found directory in it, to avoid complaints from the approx-gc program. Changing the temporary directory used by approx The TMPDIR environment more»
APPROX.CONF(5) APPROX.CONF(5) NAME approx.conf - co more»
APPROX-GC(8) APPROX-GC(8) NAME approx-gc - garb more»
APPROX-IMPORT(8) APPROX-IMPORT(8) NAME approx-import - more»
APPROX(8) APPROX(8) NAME approx - proxy s more»
approx (5.3-1) unstable; urgency=low * New upstream version * Check for chunked transfer encodi more»