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https://issues.apache.org/jira/browse/MESOS-2514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14368057#comment-14368057
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Cong Wang commented on MESOS-2514:
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pfifo is simply FIFO, and drops the packets at tail. codel measures the delay
of a packet, that is the time it sits in the queue. If the delay doesn't meet
the target during this interval, the queue could be potentially very long,
interval will be shorten and some head packets (instead of tail drops) will be
dropped until the target can be met in the next interval. So as its name says,
it controls the delay of the packets.
> Change the default leaf qdisc to fq_codel inside containers
> -----------------------------------------------------------
>
> Key: MESOS-2514
> URL: https://issues.apache.org/jira/browse/MESOS-2514
> Project: Mesos
> Issue Type: Bug
> Reporter: Cong Wang
> Assignee: Cong Wang
>
> When we enable bandwidth cap, htb is used on egress side inside containers,
> however, the default leaf qdisc for a htb class is still pfifo_fast, which is
> known to have buffer bloat. Change the default leaf qdisc to fq_codel too:
> `tc qd add dev eth0 parent 1:1 fq_codel`
> I can no longer see packet drops after this change.
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