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https://issues.apache.org/jira/browse/UIMA-2804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jim Challenger updated UIMA-2804:
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Fix Version/s: 1.0-Ducc
> Add CGroup support
> ------------------
>
> Key: UIMA-2804
> URL: https://issues.apache.org/jira/browse/UIMA-2804
> Project: UIMA
> Issue Type: New Feature
> Components: DUCC
> Reporter: Jerry Cwiklik
> Assignee: Jerry Cwiklik
> Fix For: 1.0-Ducc
>
>
> Modify ducc to use Linux cgroups. Currently, only cgroup memory subsystem
> will be used to limit amount of memory a process is allowed to use. Cgroups
> provide a light weight virtual machine for processes.
> An agent will launch processes in a cgroup container. The agent on start up
> should check a global flag in ducc.properties to enable/disable use of
> cgroups. Also, the agent should check if cgroups are properly installed on a
> node by checking for existence of /cgroup/ducc folder. The final check is
> against an exclusion file which may facilitate disabling cgroups on per
> machine basis.
> If cgroups are enabled, the agent will launch processes in a cgroup
> container. For JPs and APs, the first process assigned to the container will
> be the primary/owner of the container. The agent should support injecting
> other/secondary processes into an existing container. If the JP primary
> process terminates, the agent will proceed to kill secondary processes and
> finally remove the container. If the AP primary process terminates, the agent
> will kill secondary processes but will not remove the container. Same will be
> true for JDs. In both of these cases, the container is associated with a
> reservation and thus the container should remain for as long the reservation
> is open.
> The agent will also monitor use of swap space by each container. The
> container threshold will be computed by ducc based on assigned number of
> shares to the container. For example, if the container is assigned 1 15GB
> share on a machine with 45GB total memory, ducc will constrain the container
> to 1/3 of total (minus 1GB) swap space.
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