Cassandra - learn #1

I read my google reader. I found Apache announced Apache Cassandra 1.2.0. However, I am interested in Cassandra a bit and not know much. So, this article I used "learn" word because I just installed and testes a bit. I chose CentOs 6.3 :)
- Installed jdk 1.6. I tested to use java(OpenJDK). I found "Segmentation fault".

[root@centos ~]# chmod 750 jdk-6u38-linux-x64-rpm.bin
[root@centos ~]# ./jdk-6u38-linux-x64-rpm.bin
Unpacking...
Checksumming...
Extracting...
UnZipSFX 5.50 of 17 February 2002, by Info-ZIP (Zip-Bugs@lists.wku.edu).
  inflating: jdk-6u38-linux-amd64.rpm
  inflating: sun-javadb-common-10.6.2-1.1.i386.rpm
  inflating: sun-javadb-core-10.6.2-1.1.i386.rpm
  inflating: sun-javadb-client-10.6.2-1.1.i386.rpm
  inflating: sun-javadb-demo-10.6.2-1.1.i386.rpm
  inflating: sun-javadb-docs-10.6.2-1.1.i386.rpm
  inflating: sun-javadb-javadoc-10.6.2-1.1.i386.rpm
Preparing...                ########################################### [100%]
   1:jdk                    ########################################### [100%]
Unpacking JAR files...
        rt.jar...
        jsse.jar...
        charsets.jar...
        tools.jar...
        localedata.jar...
        plugin.jar...
        javaws.jar...
        deploy.jar...
Installing JavaDB
Preparing...                ########################################### [100%]
   1:sun-javadb-common      ########################################### [ 17%]
   2:sun-javadb-core        ########################################### [ 33%]
   3:sun-javadb-client      ########################################### [ 50%]
   4:sun-javadb-demo        ########################################### [ 67%]
   5:sun-javadb-docs        ########################################### [ 83%]
   6:sun-javadb-javadoc     ########################################### [100%]

Java(TM) SE Development Kit 6 successfully installed.

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Done.
[root@centos ~]#

- Downloaded Cassandra and start it

Note: Ensure profile to use new java and set hosts file.
[surachart@centos ~]$ tar zxf apache-cassandra-1.2.0-bin.tar.gz
[surachart@centos ~]$ cd apache-cassandra-1.2.0

[surachart@centos apache-cassandra-1.2.0]$ vi README.txt
[surachart@centos apache-cassandra-1.2.0]$ sudo mkdir -p /var/log/cassandra
[surachart@centos apache-cassandra-1.2.0]$ sudo chown -R `whoami` /var/log/cassandra
[surachart@centos apache-cassandra-1.2.0]$ sudo mkdir -p /var/lib/cassandra
[surachart@centos apache-cassandra-1.2.0]$ sudo chown -R `whoami` /var/lib/cassandra

[surachart@centos apache-cassandra-1.2.0]$ cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.111.80  centos  centos.surachartopun.com

[surachart@centos apache-cassandra-1.2.0]$ type java
java is /usr/java/default/bin/java
[surachart@centos apache-cassandra-1.2.0]$ java -version
java version "1.6.0_38"
Java(TM) SE Runtime Environment (build 1.6.0_38-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.13-b02, mixed mode)
[surachart@centos apache-cassandra-1.2.0]$
[surachart@centos apache-cassandra-1.2.0]$  bin/cassandra -f
xss =  -ea -javaagent:bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms938M -Xmx938M -Xmn100M -XX:+HeapDumpOnOutOfMemoryError -Xss180k
 INFO 19:12:44,521 Logging initialized
 INFO 19:12:44,612 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_38
 INFO 19:12:44,613 Heap size: 973078528/973078528
 INFO 19:12:44,614 Classpath: bin/../conf:bin/../build/classes/main:bin/../build/classes/thrift:bin/../lib/antlr-3.2.jar:bin/../lib/apache-cassandra-1.2.0.jar:bin/../lib/apache-cassandra-clientutil-1.2.0.jar:bin/../lib/apache-cassandra-thrift-1.2.0.jar:bin/../lib/avro-1.4.0-fixes.jar:bin/../lib/avro-1.4.0-sources-fixes.jar:bin/../lib/commons-cli-1.1.jar:bin/../lib/commons-codec-1.2.jar:bin/../lib/commons-lang-2.6.jar:bin/../lib/compress-lzf-0.8.4.jar:bin/../lib/concurrentlinkedhashmap-lru-1.3.jar:bin/../lib/guava-13.0.1.jar:bin/../lib/high-scale-lib-1.1.2.jar:bin/../lib/jackson-core-asl-1.9.2.jar:bin/../lib/jackson-mapper-asl-1.9.2.jar:bin/../lib/jamm-0.2.5.jar:bin/../lib/jline-1.0.jar:bin/../lib/json-simple-1.1.jar:bin/../lib/libthrift-0.7.0.jar:bin/../lib/log4j-1.2.16.jar:bin/../lib/metrics-core-2.0.3.jar:bin/../lib/netty-3.5.9.Final.jar:bin/../lib/servlet-api-2.5-20081211.jar:bin/../lib/slf4j-api-1.7.2.jar:bin/../lib/slf4j-log4j12-1.7.2.jar:bin/../lib/snakeyaml-1.6.jar:bin/../lib/snappy-java-1.0.4.1.jar:bin/../lib/snaptree-0.1.jar:bin/../lib/jamm-0.2.5.jar
 INFO 19:12:44,621 JNA not found. Native methods will be disabled.
 INFO 19:12:44,664 Loading settings from file:/home/surachart/apache-cassandra-1.2.0/conf/cassandra.yaml
 INFO 19:12:46,548 DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap
 INFO 19:12:46,550 disk_failure_policy is stop
 INFO 19:12:46,565 Global memtable threshold is enabled at 309MB
 INFO 19:12:50,326 Initializing key cache with capacity of 46 MBs.
 INFO 19:12:50,375 Scheduling key cache save to each 14400 seconds (going to save all keys).
 INFO 19:12:50,379 Initializing row cache with capacity of 0 MBs and provider org.apache.cassandra.cache.SerializingCacheProvider
 INFO 19:12:50,413 Scheduling row cache save to each 0 seconds (going to save all keys).
 INFO 19:12:51,332 Opening /var/lib/cassandra/data/system/local/system-local-ia-5 (448 bytes)
 INFO 19:12:52,001 Couldn't detect any schema definitions in local storage.
 INFO 19:12:52,006 Found table data in data directories. Consider using the CLI to define your schema.
 INFO 19:12:52,502 completed pre-loading (1 keys) key cache.
 INFO 19:12:52,577 Replaying /var/lib/cassandra/commitlog/CommitLog-2-1357214890686.log, /var/lib/cassandra/commitlog/CommitLog-2-1357214890687.log
 INFO 19:12:52,675 Replaying /var/lib/cassandra/commitlog/CommitLog-2-1357214890686.log
 INFO 19:12:53,455 Finished reading /var/lib/cassandra/commitlog/CommitLog-2-1357214890686.log
 INFO 19:12:53,455 Replaying /var/lib/cassandra/commitlog/CommitLog-2-1357214890687.log
 INFO 19:12:53,464 Finished reading /var/lib/cassandra/commitlog/CommitLog-2-1357214890687.log
 INFO 19:12:53,891 Enqueuing flush of Memtable-local@1458621244(52/52 serialized/live bytes, 2 ops)
 INFO 19:12:53,936 Writing Memtable-local@1458621244(52/52 serialized/live bytes, 2 ops)
 INFO 19:12:53,963 Enqueuing flush of Memtable-schema_keyspaces@64676192(389/389 serialized/live bytes, 12 ops)
 INFO 19:12:53,965 Enqueuing flush of Memtable-schema_columns@386033562(21317/21317 serialized/live bytes, 328 ops)
 INFO 19:12:53,971 Enqueuing flush of Memtable-schema_columnfamilies@1920940938(20754/20754 serialized/live bytes, 344 ops)
 INFO 19:12:53,977 Enqueuing flush of Memtable-users@2132679615(28/28 serialized/live bytes, 2 ops)
 INFO 19:12:54,068 Completed flushing /var/lib/cassandra/data/system/local/system-local-ia-6-Data.db (84 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=142)
 INFO 19:12:54,113 Writing Memtable-schema_keyspaces@64676192(389/389 serialized/live bytes, 12 ops)
 INFO 19:12:54,167 Completed flushing /var/lib/cassandra/data/system/schema_keyspaces/system-schema_keyspaces-ia-1-Data.db (265 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=142)
 INFO 19:12:54,170 Writing Memtable-schema_columns@386033562(21317/21317 serialized/live bytes, 328 ops)
 INFO 19:12:54,264 Completed flushing /var/lib/cassandra/data/system/schema_columns/system-schema_columns-ia-1-Data.db (3765 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=142)
 INFO 19:12:54,268 Writing Memtable-schema_columnfamilies@1920940938(20754/20754 serialized/live bytes, 344 ops)
 INFO 19:12:54,340 Completed flushing /var/lib/cassandra/data/system/schema_columnfamilies/system-schema_columnfamilies-ia-1-Data.db (4449 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=142)
 INFO 19:12:54,342 Writing Memtable-users@2132679615(28/28 serialized/live bytes, 2 ops)
 INFO 19:12:54,386 Completed flushing /var/lib/cassandra/data/system_auth/users/system_auth-users-ia-1-Data.db (72 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=142)
 INFO 19:12:54,389 Log replay complete, 19 replayed mutations
 INFO 19:12:55,555 Cassandra version: 1.2.0
 INFO 19:12:55,555 Thrift API version: 19.35.0
 INFO 19:12:55,559 CQL supported versions: 2.0.0,3.0.0 (default: 3.0.0)
 INFO 19:12:55,775 Loading persisted ring state
 INFO 19:12:55,796 Starting up server gossip
 INFO 19:12:55,855 Enqueuing flush of Memtable-local@737736904(251/251 serialized/live bytes, 9 ops)
 INFO 19:12:55,856 Writing Memtable-local@737736904(251/251 serialized/live bytes, 9 ops)
 INFO 19:12:56,018 Completed flushing /var/lib/cassandra/data/system/local/system-local-ia-7-Data.db (238 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=48998)
 INFO 19:12:56,245 Starting Messaging Service on port 7000
 INFO 19:12:56,328 Using saved token [3339682839163339854]
 INFO 19:12:56,336 Enqueuing flush of Memtable-local@1842275169(84/84 serialized/live bytes, 4 ops)
 INFO 19:12:56,338 Writing Memtable-local@1842275169(84/84 serialized/live bytes, 4 ops)
 INFO 19:12:56,467 Completed flushing /var/lib/cassandra/data/system/local/system-local-ia-8-Data.db (120 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=49273)
 INFO 19:12:56,486 Enqueuing flush of Memtable-local@1854861687(50/50 serialized/live bytes, 2 ops)
 INFO 19:12:56,491 Writing Memtable-local@1854861687(50/50 serialized/live bytes, 2 ops)
 INFO 19:12:56,529 Compacting [SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ia-5-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ia-7-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ia-6-Data.db'), SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-ia-8-Data.db')]
 INFO 19:12:56,576 Completed flushing /var/lib/cassandra/data/system/local/system-local-ia-9-Data.db (108 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=49447)
 INFO 19:12:56,666 Node localhost/127.0.0.1 state jump to normal
 INFO 19:12:56,722 Enqueuing flush of Memtable-local@995807706(50/50 serialized/live bytes, 2 ops)
 INFO 19:12:56,724 Writing Memtable-local@995807706(50/50 serialized/live bytes, 2 ops)
 INFO 19:12:56,823 Completed flushing /var/lib/cassandra/data/system/local/system-local-ia-10-Data.db (108 bytes) for commitlog position ReplayPosition(segmentId=1357215172266, position=49621)
 INFO 19:12:56,828 Startup completed! Now serving reads.
 INFO 19:12:57,027 Not starting native transport as requested. Use JMX (StorageService->startNativeTransport()) to start it
 INFO 19:12:57,059 Binding thrift service to localhost/127.0.0.1:9160
 INFO 19:12:57,160 Compacted to [/var/lib/cassandra/data/system/local/system-local-ia-11-Data.db,].  890 to 427 (~47% of original) bytes for 1 keys at 0.000722MB/s.  Time: 564ms.
 INFO 19:12:57,228 Using TFramedTransport with a max frame size of 15728640 bytes.
 INFO 19:12:57,248 Using synchronous/threadpool thrift server on localhost : 9160
 INFO 19:12:57,251 Listening for thrift clients...

It looks good, then test...