Author: brandonwilliams Date: Tue Jan 25 20:06:37 2011 New Revision: 1063434
URL: http://svn.apache.org/viewvc?rev=1063434&view=rev Log: Move demo Keyspace1 definition from casandra.yaml to an input file for cassandra-cli. Patch by Aaron Morton, reviewed by brandonwilliams for CASSANDRA-2007 Added: cassandra/branches/cassandra-0.7/conf/Keyspace1.txt Modified: cassandra/branches/cassandra-0.7/conf/cassandra.yaml Added: cassandra/branches/cassandra-0.7/conf/Keyspace1.txt URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.7/conf/Keyspace1.txt?rev=1063434&view=auto ============================================================================== --- cassandra/branches/cassandra-0.7/conf/Keyspace1.txt (added) +++ cassandra/branches/cassandra-0.7/conf/Keyspace1.txt Tue Jan 25 20:06:37 2011 @@ -0,0 +1,184 @@ +/*This file contains an example Keyspace that can be created using the +cassandra-cli command line interface as follows. + +bin/cassandra-cli -host localhost --file conf/Keyspace1.txt + +The cassandra-cli includes online help which you can accessed without needing +to connect to a running cassandra instance by starting the client and typing "help;" + +Keyspaces have ColumnFamilies. (Usually 1 KS per application.) +ColumnFamilies have Rows. (Dozens of CFs per KS.) +Rows contain Columns. (Many per CF.) +Columns contain name:value:timestamp. (Many per Row.) + +A KS is most similar to a schema, and a CF is most similar to a relational table. + +Keyspaces, ColumnFamilies, and Columns may carry additional +metadata that change their behavior. These are as follows: + +Keyspace required parameters: +- name: name of the keyspace; "system" is + reserved for Cassandra Internals. +- placement_strategy: the class that determines how replicas + are distributed among nodes. Contains both the class as well as + configuration information. Must extend AbstractReplicationStrategy. + Out of the box, Cassandra provides + - org.apache.cassandra.locator.SimpleStrategy + - org.apache.cassandra.locator.NetworkTopologyStrategy + - org.apache.cassandra.locator.OldNetworkTopologyStrategy + + SimpleStrategy merely places the first + replica at the node whose token is closest to the key (as determined + by the Partitioner), and additional replicas on subsequent nodes + along the ring in increasing Token order. + + With NetworkTopologyStrategy, + for each datacenter, you can specify how many replicas you want + on a per-keyspace basis. Replicas are placed on different racks + within each DC, if possible. This strategy also requires rack aware + snitch, such as RackInferringSnitch or PropertyFileSnitch. + An example: + create keyspace Keyspace1 + with replication_factor = 3 + and placement_strategy = 'org.apache.cassandra.locator.NetworkTopologyStrategy' + strategy_options: + DC1 : 3 + DC2 : 2 + DC3 : 1 + + OldNetworkToplogyStrategy [formerly RackAwareStrategy] + places one replica in each of two datacenters, and the third on a + different rack in in the first. Additional datacenters are not + guaranteed to get a replica. Additional replicas after three are placed + in ring order after the third without regard to rack or datacenter. +- replication_factor: Number of replicas of each row + +Keyspace optional paramaters: +- strategy_options: Additional information for the placement strategy. + +ColumnFamily required parameters: +- name: name of the ColumnFamily. Must not contain the character "-". +- comparator: tells Cassandra how to sort the columns for slicing + operations. The default is BytesType, which is a straightforward + lexical comparison of the bytes in each column. Other options are + AsciiType, UTF8Type, LexicalUUIDType, TimeUUIDType, LongType, + and IntegerType (a generic variable-length integer type). + You can also specify the fully-qualified class name to a class of + your choice extending org.apache.cassandra.db.marshal.AbstractType. + +ColumnFamily optional parameters: +- column_type: Super or Standard, defaults to Standard. +- subcomparator: Comparator for sorting subcolumn names, for Super Columns only. +- keys_cached: specifies the number of keys per sstable whose + locations we keep in memory in "mostly LRU" order. (JUST the key + locations, NOT any column values.) Specify a fraction (value less + than 1) or an absolute number of keys to cache. Defaults to 200000 + keys. +- rows_cached: specifies the number of rows whose entire contents we + cache in memory. Do not use this on ColumnFamilies with large rows, + or ColumnFamilies with high write:read ratios. Specify a fraction + (value less than 1) or an absolute number of rows to cache. + Defaults to 0. (i.e. row caching is off by default) +- comment: used to attach additional human-readable information about + the column family to its definition. +- read_repair_chance: specifies the probability with which read + repairs should be invoked on non-quorum reads. must be between 0 + and 1. defaults to 1.0 (always read repair). +- gc_grace: specifies the time to wait before garbage + collecting tombstones (deletion markers). defaults to 864000 (10 + days). See http://wiki.apache.org/cassandra/DistributedDeletes +- default_validation_class: specifies a validator class to use for + validating all the column values in the CF. +NOTE: +min_ must be less than max_compaction_threshold! +- min_compaction_threshold: the minimum number of SSTables needed + to start a minor compaction. increasing this will cause minor + compactions to start less frequently and be more intensive. setting + this to 0 disables minor compactions. defaults to 4. +- max_compaction_threshold: the maximum number of SSTables allowed + before a minor compaction is forced. decreasing this will cause + minor compactions to start more frequently and be less intensive. + setting this to 0 disables minor compactions. defaults to 32. +/NOTE +- row_cache_save_period: number of seconds between saving + row caches. The row caches can be saved periodically and if one + exists on startup it will be loaded. +- key_cache_save_period: number of seconds between saving + key caches. The key caches can be saved periodically and if one + exists on startup it will be loaded. +- memtable_flush_after: The maximum time in minutes to leave a dirty table + unflushed. This should be large enough that it won't cause a flush + storm of all memtables during periods of inactivity. +- memtable_throughput: The maximum size of the memtable in mb before + it is flushed. If undefined, 1/8 * heapsize will be used. +- memtable_operations: Number of operations in millions + before the memtable is flushed. If undefined, throughput / 64 * 0.3 + will be used. +- column_metadata: + Metadata used to describe colums and define indexes in the Column Familty. + Column required parameters: + - column_name: binds a validator (and optionally an indexer) to columns + with this name in any row of the enclosing column family. + - validation_class: like cf.comparator, an AbstractType that checks + that the value of the column is well-defined. + Column optional parameters: + NOTE: + index_name cannot be set if index_type is not also set! + - index_name: User-friendly name for the index. + - index_type: The type of index to be created. Currently only + 0 is supported, indicating KEYS. + /NOTE +*/ + +create keyspace Keyspace1 + with replication_factor = 1 + and placement_strategy = 'org.apache.cassandra.locator.SimpleStrategy'; + +use Keyspace1; + +create column family Standard1 + with comparator = BytesType + and keys_cached = 10000 + and rows_cached = 1000 + and row_cache_save_period = 0 + and key_cache_save_period = 3600 + and memtable_flush_after = 59 + and memtable_throughput = 255 + and memtable_operations = 0.29; + +create column family Standard2 + with comparator = UTF8Type + and read_repair_chance = 0.1 + and keys_cached = 100 + and gc_grace = 0 + and min_compaction_threshold = 5 + and max_compaction_threshold = 31; + +create column family StandardByUUID1 + with comparator = TimeUUIDType; + +create column family Super1 + with column_type = Super + and comparator = BytesType + and subcomparator = BytesType; + +create column family Super2 + with column_type = Super + and subcomparator = UTF8Type + and rows_cached = 10000 + and keys_cached = 50 + and comment = 'A column family with supercolumns, whose column and subcolumn names are UTF8 strings'; + +create column family Super3 + with column_type = Super + and comparator = LongType + and comment = 'A column family with supercolumns, whose column names are Longs (8 bytes)'; + +create column family Indexed1 + with default_validation_class = LongType + and column_metadata = [{ + column_name : birthdate, + validation_class : LongType, + index_name : birthdate_idx, + index_type : 0} + ]; Modified: cassandra/branches/cassandra-0.7/conf/cassandra.yaml URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.7/conf/cassandra.yaml?rev=1063434&r1=1063433&r2=1063434&view=diff ============================================================================== --- cassandra/branches/cassandra-0.7/conf/cassandra.yaml (original) +++ cassandra/branches/cassandra-0.7/conf/cassandra.yaml Tue Jan 25 20:06:37 2011 @@ -287,176 +287,5 @@ request_scheduler: org.apache.cassandra. # the index is at the cost of space. index_interval: 128 -# Keyspaces have ColumnFamilies. (Usually 1 KS per application.) -# ColumnFamilies have Rows. (Dozens of CFs per KS.) -# Rows contain Columns. (Many per CF.) -# Columns contain name:value:timestamp. (Many per Row.) -# -# A KS is most similar to a schema, and a CF is most similar to a relational table. -# -# Keyspaces, ColumnFamilies, and Columns may carry additional -# metadata that change their behavior. These are as follows: -# -# Keyspace required parameters: -# - name: name of the keyspace; "system" is -# reserved for Cassandra Internals. -# - replica_placement_strategy: the class that determines how replicas -# are distributed among nodes. Contains both the class as well as -# configuration information. Must extend AbstractReplicationStrategy. -# Out of the box, Cassandra provides -# * org.apache.cassandra.locator.SimpleStrategy -# * org.apache.cassandra.locator.NetworkTopologyStrategy -# * org.apache.cassandra.locator.OldNetworkTopologyStrategy -# -# SimpleStrategy merely places the first -# replica at the node whose token is closest to the key (as determined -# by the Partitioner), and additional replicas on subsequent nodes -# along the ring in increasing Token order. -# -# With NetworkTopologyStrategy, -# for each datacenter, you can specify how many replicas you want -# on a per-keyspace basis. Replicas are placed on different racks -# within each DC, if possible. This strategy also requires rack aware -# snitch, such as RackInferringSnitch or PropertyFileSnitch. -# An example: -# - name: Keyspace1 -# replica_placement_strategy: org.apache.cassandra.locator.NetworkTopologyStrategy -# strategy_options: -# DC1 : 3 -# DC2 : 2 -# DC3 : 1 -# -# OldNetworkToplogyStrategy [formerly RackAwareStrategy] -# places one replica in each of two datacenters, and the third on a -# different rack in in the first. Additional datacenters are not -# guaranteed to get a replica. Additional replicas after three are placed -# in ring order after the third without regard to rack or datacenter. -# - replication_factor: Number of replicas of each row -# Keyspace optional paramaters: -# - strategy_options: Additional information for the replication strategy. -# - column_families: -# ColumnFamily required parameters: -# - name: name of the ColumnFamily. Must not contain the character "-". -# - compare_with: tells Cassandra how to sort the columns for slicing -# operations. The default is BytesType, which is a straightforward -# lexical comparison of the bytes in each column. Other options are -# AsciiType, UTF8Type, LexicalUUIDType, TimeUUIDType, LongType, -# and IntegerType (a generic variable-length integer type). -# You can also specify the fully-qualified class name to a class of -# your choice extending org.apache.cassandra.db.marshal.AbstractType. -# -# ColumnFamily optional parameters: -# - keys_cached: specifies the number of keys per sstable whose -# locations we keep in memory in "mostly LRU" order. (JUST the key -# locations, NOT any column values.) Specify a fraction (value less -# than 1) or an absolute number of keys to cache. Defaults to 200000 -# keys. -# - rows_cached: specifies the number of rows whose entire contents we -# cache in memory. Do not use this on ColumnFamilies with large rows, -# or ColumnFamilies with high write:read ratios. Specify a fraction -# (value less than 1) or an absolute number of rows to cache. -# Defaults to 0. (i.e. row caching is off by default) -# - comment: used to attach additional human-readable information about -# the column family to its definition. -# - read_repair_chance: specifies the probability with which read -# repairs should be invoked on non-quorum reads. must be between 0 -# and 1. defaults to 1.0 (always read repair). -# - gc_grace_seconds: specifies the time to wait before garbage -# collecting tombstones (deletion markers). defaults to 864000 (10 -# days). See http://wiki.apache.org/cassandra/DistributedDeletes -# - default_validation_class: specifies a validator class to use for -# validating all the column values in the CF. -# NOTE: -# min_ must be less than max_compaction_threshold! -# - min_compaction_threshold: the minimum number of SSTables needed -# to start a minor compaction. increasing this will cause minor -# compactions to start less frequently and be more intensive. setting -# this to 0 disables minor compactions. defaults to 4. -# - max_compaction_threshold: the maximum number of SSTables allowed -# before a minor compaction is forced. decreasing this will cause -# minor compactions to start more frequently and be less intensive. -# setting this to 0 disables minor compactions. defaults to 32. -# /NOTE -# - row_cache_save_period_in_seconds: number of seconds between saving -# row caches. The row caches can be saved periodically and if one -# exists on startup it will be loaded. -# - key_cache_save_period_in_seconds: number of seconds between saving -# key caches. The key caches can be saved periodically and if one -# exists on startup it will be loaded. -# - memtable_flush_after_mins: The maximum time to leave a dirty table -# unflushed. This should be large enough that it won't cause a flush -# storm of all memtables during periods of inactivity. -# - memtable_throughput_in_mb: The maximum size of the memtable before -# it is flushed. If undefined, 1/8 * heapsize will be used. -# - memtable_operations_in_millions: Number of operations in millions -# before the memtable is flushed. If undefined, throughput / 64 * 0.3 -# will be used. -# - column_metadata: -# Column required parameters: -# - name: binds a validator (and optionally an indexer) to columns -# with this name in any row of the enclosing column family. -# - validator: like cf.compare_with, an AbstractType that checks -# that the value of the column is well-defined. -# Column optional parameters: -# NOTE: -# index_name cannot be set if index_type is not also set! -# - index_name: User-friendly name for the index. -# - index_type: The type of index to be created. Currently only -# KEYS is supported. -# /NOTE -# -# NOTE: -# this keyspace definition is for demonstration purposes only. -# Cassandra will not load these definitions during startup. See -# http://wiki.apache.org/cassandra/FAQ#no_keyspaces for an explanation. -# /NOTE -keyspaces: - - name: Keyspace1 - replica_placement_strategy: org.apache.cassandra.locator.SimpleStrategy - replication_factor: 1 - column_families: - - name: Standard1 - compare_with: BytesType - keys_cached: 10000 - rows_cached: 1000 - row_cache_save_period_in_seconds: 0 - key_cache_save_period_in_seconds: 3600 - memtable_flush_after_mins: 59 - memtable_throughput_in_mb: 255 - memtable_operations_in_millions: 0.29 - - - name: Standard2 - compare_with: UTF8Type - read_repair_chance: 0.1 - keys_cached: 100 - gc_grace_seconds: 0 - min_compaction_threshold: 5 - max_compaction_threshold: 31 - - - name: StandardByUUID1 - compare_with: TimeUUIDType - - - name: Super1 - column_type: Super - compare_with: BytesType - compare_subcolumns_with: BytesType - - - name: Super2 - column_type: Super - compare_subcolumns_with: UTF8Type - rows_cached: 10000 - keys_cached: 50 - comment: 'A column family with supercolumns, whose column and subcolumn names are UTF8 strings' - - - name: Super3 - column_type: Super - compare_with: LongType - comment: 'A column family with supercolumns, whose column names are Longs (8 bytes)' - - - name: Indexed1 - default_validation_class: LongType - column_metadata: - - name: birthdate - validator_class: LongType - index_name: birthdate_idx - index_type: KEYS +# NOTE: see conf/Keyspace1.txt for an example of how to define keyspaces with +# cassandra-cli
