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- 3 and 4: limited debug information is written to apt-cacher.err
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- 5: much more debug information written to apt-cacher.err
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(requires a special binary, see above)
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(requires a special debug binary, see section 8.2)
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- 11: like 5 but all Debug marks are printed to the log, including
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anonymous marks for code flow tracking.
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7.6 Avoid use of apt-cacher-ng for certain hosts
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Sometimes clients might not to use apt-cacher-ng for certain hosts
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while accessing all others through it. Such hosts can be marked for
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direct access in apt configuration, e.g. in _/etc/apt/apt.conf_:
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Sometimes clients might need to access some remote side directly
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to do some non-file-transfer oriented work but still passing the
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data through configured apt-cacher-ng proxy. Such remote hosts
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can be marked for direct access in apt configuration, e.g. in
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Acquire::HTTP::Proxy::archive.example.org "DIRECT";
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//or Acquire::HTTP::Proxy::archive.example.org "other.proxy:port"
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7.7 Avoid caching for certain domains or certain file types
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Sometimes clients to download through apt-cacher-ng but the data
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shall not be stored on the harddisk of the server. To get it, use
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the DontCache directive (see examples for details) to define such
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7.8 How to make big download series faster
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Symptom: A common situation is a periodic download of hundreds of
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files through apt-cacher-ng where just a half is present in the
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cache. Although caching works fine, there are visible delays on some
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files during the download.
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Possible cause and relief: the download from the real mirror gets
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interrupted while apt-cacher-ng delivers a set of files from the
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internal cache. While the connection is suspended, it times out and
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needs to be recreated when a miss occurs, i.e. apt-cacher-ng has to
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fetch more from the remote mirror. A workaround to this behaviour
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is simple, provided that the remote mirror can handle long request
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queues: set the pipelining depth to a very high value in apt.conf
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file or one of its replacement files in /etc/apt/apt.conf.d/. With
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`Acquire::http { Pipeline-Depth "200"; } '
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there is a higher chance to get the server connection "preheated"
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before a stall occurs.
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Chapter 8: Troubleshooting
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README
