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Merge pull request #1052 from gonkulator/master 

Grammar regarding least and fewest
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Victor Vieux 2015-07-14 11:49:24 -07:00
parent 8935c892c3 b0cbaeccae
commit 8e999214fb
1 changed files with 8 additions and 9 deletions
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17
scheduler/strategy/README.md
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@ -26,10 +26,9 @@ intended for debugging.
Your goal in choosing a strategy is to best optimize your swarm according to Your goal in choosing a strategy is to best optimize your swarm according to
your company's needs. your company's needs.
Under the `spread` strategy, Swarm optimizes for the node with the least number Under the `spread` strategy, Swarm optimizes for the node with the fewest running containers.
of running containers. The `binpack` strategy causes Swarm to optimize for the The `binpack` strategy causes Swarm to optimize for the node which is most packed.
node which is most packed. The `random` strategy, like it sounds, chooses The `random` strategy, like it sounds, chooses nodes at random regardless of their available CPU or RAM.
nodes at random regardless of their available CPU or RAM.
Using the `spread` strategy results in containers spread thinly over many Using the `spread` strategy results in containers spread thinly over many
machines. The advantage of this strategy is that if a node goes down you only machines. The advantage of this strategy is that if a node goes down you only
@ -73,9 +72,9 @@ CONTAINER ID IMAGE COMMAND CREATED
f8b693db9cd6 mysql:latest "mysqld" Up About a minute running 192.168.0.42:49178->3306/tcp node-1 db f8b693db9cd6 mysql:latest "mysqld" Up About a minute running 192.168.0.42:49178->3306/tcp node-1 db
``` ```
The container `frontend` was started on `node-2` because it was the node the The container `frontend` was started on `node-2` because it was the node with the
least loaded already. If two nodes have the same amount of available RAM and fewest running containers. If two nodes have the same amount of available RAM and
CPUs, the `spread` strategy prefers the node with least containers running. CPUs, the `spread` strategy prefers the node with the fewest containers running.
## BinPack strategy example ## BinPack strategy example
@ -105,11 +104,11 @@ f8b693db9cd6 mysql:latest "mysqld" Up About a minute
``` ```
The system starts the new `frontend` container on `node-1` because it was the The system starts the new `frontend` container on `node-1` because it was the
node the most packed already. This allows us to start a container requiring 2G node with the most running containers. This allows us to start a container requiring 2G
of RAM on `node-2`. of RAM on `node-2`.
If two nodes have the same amount of available RAM and CPUs, the `binpack` If two nodes have the same amount of available RAM and CPUs, the `binpack`
strategy prefers the node with most containers running. strategy prefers the node with the most running containers.
## Docker Swarm documentation index ## Docker Swarm documentation index