.. _cassandra:


***************
Cassandra
***************

Check the you have the right java and python version (Java and
Python2.7)::

  Guillermo-Rangels-MacBook-Pro:~ cubreto$ java -version
  java version "1.6.0_37"
  Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-11M3909)
  Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode)
  Guillermo-Rangels-MacBook-Pro:~ cubreto$ python -v
  Python 2.7.2

Start by downloading Cassandra::

  curl -OL http://downloads.datastax.com/community/dsc.tar.gz
  tar xzf dsc.tar.gz

Then you run Cassandra::

  bin cubreto$ sudo ./cassandra
  xss =  -ea -javaagent:./../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms1024M -Xmx1024M -Xmn200M -XX:+HeapDumpOnOutOfMemoryError
  Guillermo-Rangels-MacBook-Pro:bin cubreto$  INFO 10:05:09,585 Logging initialized
  INFO 10:05:09,591 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_37
  INFO 10:05:09,592 Heap size: 1052770304/1052770304
  INFO 10:05:09,592 Classpath:
  ./../conf:./../build/classes/main:./../build/classes/thrift:./../lib/antlr-3.2.jar:./../lib/apache-cassandra-1.1.6.jar:./../lib/apache-cassandra-clientutil-1.1.6.jar:./../lib/apache-cassandra-t
  hrift-1.1.6.jar:./../lib/avro-1.4.0-fixes.jar:./../lib/avro-1.4.0-sources-fixes.jar:./../lib/commons-cli-1.1.jar:./../lib/commons-codec-1.2.jar:./../lib/commons-lang-2.4.jar:./../lib/compress-lzf-0.8.4.jar:./../lib/concu
  rrentlinkedhashmap-lru-1.3.jar:./../lib/guava-r08.jar:./../lib/high-scale-lib-1.1.2.jar:./../lib/jackson-core-asl-1.9.2.jar:./../lib/jackson-mapper-asl-1.9.2.jar:./../lib/jamm-0.2.5.jar:./../lib/jline-0.9.94.jar:./../lib/json
  -simple-1.1.jar:./../lib/libthrift-0.7.0.jar:./../lib/log4j-1.2.16.jar:./../lib/metrics-core-2.0.3.jar:./../lib/servlet-api-2.5-20081211.jar:./../lib/slf4j-api-1.6.1.jar:./../lib/slf4j-log4j12-1.6.1.jar:./../lib/snakeyaml-1.6.jar
  :./../lib/snappy-java-1.0.4.1.jar:./../lib/snaptree-0.1.jar:./../lib/jamm-0.2.5.jar
  INFO 10:05:09,594 JNA not found. Native methods will be disabled.
  INFO 10:05:09,607 Loading settings from file:/Users/cubreto/Downloads/dsc-cassandra-1.1.6/conf/cassandra.yaml
  INFO 10:05:09,775 DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap
  INFO 10:05:10,016 Global memtable threshold is enabled at 334MB
  INFO 10:05:10,273 Initializing key cache with capacity of 50 MBs.
  INFO 10:05:10,288 Scheduling key cache save to each 14400 seconds (going to save all keys).
  INFO 10:05:10,289 Initializing row cache with capacity of 0 MBs and provider org.apache.cassandra.cache.SerializingCacheProvider
  INFO 10:05:10,294 Scheduling row cache save to each 0 seconds (going to save all keys).
  INFO 10:05:11,072 Couldn't detect any schema definitions in local storage.
  INFO 10:05:11,073 Found table data in data directories. Consider using the CLI to define your schema.
  INFO 10:05:11,156 No commitlog files found; skipping replay
  INFO 10:05:11,287 Cassandra version: 1.1.6
  INFO 10:05:11,290 Thrift API version: 19.32.0
  INFO 10:05:11,318 CQL supported versions: 2.0.0,3.0.0-beta1 (default: 2.0.0)
  INFO 10:05:11,418 Loading persisted ring state
  INFO 10:05:11,431 Starting up server gossip
  INFO 10:05:11,478 Enqueuing flush of Memtable-LocationInfo@1321312491(126/157 serialized/live bytes, 3 ops)
  INFO 10:05:11,479 Writing Memtable-LocationInfo@1321312491(126/157 serialized/live bytes, 3 ops)
  INFO 10:05:11,677 Completed flushing /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hf-1-Data.db (234 bytes) for commitlog position ReplayPosition(segmentId=1352052310892, position=586)
  INFO 10:05:11,768 Starting Messaging Service on port 7000
  WARN 10:05:11,815 Generated random token 25113062564666185856866287474728892865. Random tokens will result in an unbalanced ring; see http://wiki.apache.org/cassandra/Operations
  INFO 10:05:11,817 Enqueuing flush of Memtable-LocationInfo@1033806195(53/66 serialized/live bytes, 2 ops)
  INFO 10:05:11,818 Writing Memtable-LocationInfo@1033806195(53/66 serialized/live bytes, 2 ops)
  INFO 10:05:11,831 Completed flushing /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hf-2-Data.db (163 bytes) for commitlog position ReplayPosition(segmentId=1352052310892, position=767)
  INFO 10:05:11,836 Node localhost/127.0.0.1 state jump to normal
  INFO 10:05:11,838 Bootstrap/Replace/Move completed! Now serving reads.

.. _Datastax:

Datastax
-----------------

 .. plot:: pyplots/xsection.py
     :include-source:

.. image:: pyplots/UPC_pt_graphlog.png


.. _Opscenter:

Ops Center
-----------------
 

:ref:`custom_look`.