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Message #75987
[Bug 1794982] Re: drop /etc/apt/apt.conf.d/90cloud-init-pipelining in 16.04+
[Expired for cloud-init because there has been no activity for 60 days.]
** Changed in: cloud-init
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1794982
Title:
drop /etc/apt/apt.conf.d/90cloud-init-pipelining in 16.04+
Status in cloud-init:
Expired
Bug description:
/etc/apt/apt.conf.d/90cloud-init-pipelining disables pipelining which
causes a significant performance reduction in apt downloads. This
should not be necessary in 16.04, as apt can detect broken pipeline
responses, fix it, and disable pipelining for the next connection (it
can also match the response based on the hashes, rather than just
complaining the hashes are wrong).
This is causing a significant performance decrease, as a small sample,
firefox in a fresh lxd container:
without pipelining: Fetched 81.1 MB in 6s (13.2 MB/s)
with pipelining: Fetched 81.1 MB in 2s (32.2 MB/s)
(400 Mbit/s connection, 25-30ms RTT, xenial LXD container)
Related bugs:
* bug 948461: apt-get hashsum/size mismatch because s3 mirrors don't support http pipelining correctly
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References