mediawiki.conf: implement thumbnail attribute

[pve-docs.git] / pct.adoc

diff --git a/pct.adoc b/pct.adoc
index 7a5e9b705bb6d2ec43c1613f896275bc1fc42ef8..5f2fb3fe50bc6ff367a6a81b6e736885cb02f112 100644 (file)
--- a/pct.adoc
+++ b/pct.adoc
@@ -347,10 +347,69 @@ ACLs allow you to set more detailed file ownership than the traditional user/
 group/others model.
 
 
-[[pct_setting]]
+[[pct_settings]]
 Container Settings
 ------------------
 
+[[pct_cpu]]
+CPU
+~~~
+
+You can restrict the number of visible CPUs inside the container using
+the `cores` option. This is implemented using the Linux 'cpuset'
+cgroup (**c**ontrol *group*). A special task inside `pvestatd` tries
+to distribute running containers among available CPUs. You can view
+the assigned CPUs using the following command:
+
+----
+# pct cpusets
+ ---------------------
+ 102:              6 7
+ 105:      2 3 4 5
+ 108:  0 1
+ ---------------------
+----
+
+Containers use the host kernel directly, so all task inside a
+container are handled by the host CPU scheduler. {pve} uses the Linux
+'CFS' (**C**ompletely **F**air **S**cheduler) scheduler by default,
+which has additional bandwidth control options.
+
+[horizontal]
+
+`cpulimit`: :: You can use this option to further limit assigned CPU
+time. Please note that this is a floating point number, so it is
+perfectly valid to assign two cores to a container, but restrict
+overall CPU consumption to half a core.
++
+----
+cores: 2
+cpulimit: 0.5
+----
+
+`cpuunits`: :: This is a relative weight passed to the kernel
+scheduler. The larger the number is, the more CPU time this container
+gets. Number is relative to the weights of all the other running
+containers. The default is 1024. You can use this setting to
+prioritize some containers.
+
+
+[[pct_memory]]
+Memory
+~~~~~~
+
+Container memory is controlled using the cgroup memory controller.
+
+[horizontal]
+
+`memory`: :: Limit overall memory usage. This corresponds
+to the `memory.limit_in_bytes` cgroup setting.
+
+`swap`: :: Allows the container to use additional swap memory from the
+host swap space. This corresponds to the `memory.memsw.limit_in_bytes`
+cgroup setting, which is set to the sum of both value (`memory +
+swap`).
+
 
 [[pct_mount_points]]
 Mount Points
@@ -432,8 +491,8 @@ NOTE: The contents of device mount points are not backed up when using `vzdump`.
 
 
 [[pct_container_network]]
-Container Network
-~~~~~~~~~~~~~~~~~
+Network
+~~~~~~~
 
 You can configure up to 10 network interfaces for a single
 container. The corresponding options are called `net0` to `net9`, and