Benjamin Mahler created MESOS-7136:
--------------------------------------
Summary: Eliminate fair sharing between frameworks within a role.
Key: MESOS-7136
URL: https://issues.apache.org/jira/browse/MESOS-7136
Project: Mesos
Issue Type: Epic
Components: allocation, technical debt
Reporter: Benjamin Mahler
The current fair sharing algorithm performs fair sharing between frameworks
within a role. This is equivalent to having the framework id behave as a
pseudo-role beneath the role. Consider the case where there are two spark
frameworks running within the same "spark" role. This behaves similarly to
hierarchical roles with the framework ID acting as an implicit role:
{noformat}
^
/ \
spark services
^
/ \
/ \
FrameworkId1 FrameworkId2
(fixed weight of 1) (fixed weight of 1)
{noformat}
Unfortunately, the frameworks cannot change their weight to be a value other
than 1 (see MESOS-6247) and they cannot set quota.
With the addition of hierarchical roles (see MESOS-6375) we can eliminate the
notion of the framework ID acting as a pseudo-role in favor of explicitly using
hierarchical roles. E.g.
{noformat}
^
/ \
eng sales
^
/ \
analytics ui
^
/ \
learning reports
{noformat}
Here if two frameworks run within the eng/analytics role, then they will
compete for resources without fair sharing. However, if resource guarantees are
required, sub-roles can be created explicitly, e.g. eng/analytics/learning and
eng/analytics/reports. These roles can be given weights and quota.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
