Readme updated (notes on scaling)

Author: turiphro

README.md

@@ -4,15 +4,21 @@ NoSQL Database lab
 This is a collection of ready-to-go experiments with databases.
 
 Every database has a Hello World setup with
-[Docker compose](https://docs.docker.com/compose/) to run on any OS.
+[Docker compose](https://docs.docker.com/compose/) to run on any OS,
+usually in a distributed (multi-host) fashion.
+Start any database with:
+    `docker-compose up`
+
+Some databases might need to scale to multiple nodes (`--scale node=N`).
+
 All databases have some example scripts that try to highlight some of the
 strengths and peculiarities:
 
-- `./propagate.sh`: (big) data generation, to have some data
-- `./aggregate.sh`: perform some exemplar aggregation on the data
+- `docker-compose run scripts ./propagate.sh`: (big) data generation, to have some data
+- `docker-compose run scripts ./aggregate.sh`: perform some exemplar aggregation on the data
 
 Read the corresponding README for the database for specific instructions.
 
-This database lab was inspired by the "7 Databases in 7 Weeks" book, but has
-grown in database scope since then. I tried to pin all Docker containers to
+This database lab was inspired by the "7 Databases in 7 Weeks" book, but will
+grow in database scope over time. I tried to pin all Docker containers to
 specific versions; feel free to update or expand the examples where desired!

riak/README.md

@@ -1,10 +1,10 @@
 Start with:
 
-	docker-compose up -d --scale member=5
+	docker-compose up -d --scale node=5
 
 See status with:
 
-    docker-compose exec member riak-admin cluster status
+    docker-compose exec node riak-admin cluster status
 
 Run scripts with:
 

riak/docker-compose.yml

@@ -18,7 +18,7 @@ services:
     volumes:
       - schemas:/etc/riak/schemas
       - data:/var/lib/riak  # persistent; remove for ephemeral tasks
-  member: # additional nodes (docker-compose scale member=N)
+  node: # additional nodes (docker-compose scale node=N)
     image: basho/riak-kv:ubuntu-2.1.4
     ports:
       - "8087"