remove useless config file

conf/iotdb-engine.properties

@@ -1,55 +0,0 @@
-# JDBC Server configuration
-
-# port which JDBC server listens to
-rpc_port=6667
-
-# Write ahead log configuration
-
-# is write ahead log enable
-enable_wal=true
-
-# When the total number of write ahead log in the file and memory reaches the specified size, all the logs are compressed and the unused logs are removed
-# Increase this value, it will lead to short write pause. Decrease this value, it will increase IO and CPU consumption
-wal_cleanup_threshold=500000
-
-# When a certain amount ofwrite ahead log is reached, it will be flushed to disk
-# It is possible to lose at most flush_wal_threshold operations
-flush_wal_threshold=10000
-
-# The cycle when write ahead log is periodically refreshed to disk(in milliseconds)
-# It is possible to lose at most flush_wal_period_in_ms ms operations
-flush_wal_period_in_ms=10
-
-# database features configuration
-
-# data dir
-# If this value starts with "/", use absolute path. Otherwise, it will save the data in the relative path directory under the IoTDB folder
-data_dir=data
-
-# The maximum concurrent thread number for merging overflow
-# Increase this value, it will increase IO and CPU consumption
-# Decrease this value, when there is much overflow data, it will increase disk usage, which will reduce read speed
-merge_concurrent_threads=10
-
-# Maximum number of folders open at the same time
-# Increase this value, it will use more memory, random I/O becomes smaller, file fragmentation (i.e., group) is more neat.
-# Decrease this value, it will use less memory, random I/O becomes greater, file fragmentation is less neat.
-# group_size_in_byte * max_opened_folder = theoretical value of maximum memory occupancy
-# For an application, the total amount of folder is equal to the number of storage_group settings in SQL
-max_opened_folder=100
-
-# The amount of data that is read every time when IoTDB merge data.
-fetch_size=10000
-
-# The period time of flushing data from memory to file. 
-# The unit is second.
-period_time_for_flush_in_second=3600
-# The period time for merge overflow data with tsfile data.
-# The unit is second.
-period_time_for_merge_in_second=7200
-
-
-# time zone of server side
-# default value is +08:00
-# eg. +08:00, -01:00
-time_zone=+08:00

conf/tsfile-format.properties

@@ -1,32 +0,0 @@
-# Memory size threshold for flushing to disk or HDFS, default value is 128MB
-group_size_in_byte=134217728
-
-# The memory size for each series writer to pack page, default value is 1MB
-page_size_in_byte=1048576
-
-# The maximum number of data points in a page, defalut 1024*1024
-max_number_of_points_in_page=1048576
-
-# Data type configuration
-
-# Data type for input timestamp, TsFile supports INT32 or INT64
-time_series_data_type=INT64
-
-# Max length limitation of input string
-max_string_length=128
-
-# Floating-point precision
-float_precision=2
-
-# Encoder configuration
-
-# Encoder of time series, TsFile supports TS_2DIFF, PLAIN and RLE(run-length encoding) and default value is TS_2DIFF
-time_series_encoder=TS_2DIFF
-
-# Encoder of value series. default value is RLE. For int, long, float, double data type, TsFile also supports TS_2DIFF and RLE(run-length encoding)
-value_encoder=PLAIN
-
-# Compression configuration
-
-# Data compression method, TsFile supports UNCOMPRESSED or SNAPPY. Default value is UNCOMPRESSED which means no compression
-compressor=UNCOMPRESSED

src/main/java/cn/edu/tsinghua/iotdb/conf/TsfileDBConfig.java

@@ -16,7 +16,7 @@ public class TsfileDBConfig {
 	/**
 	 * Is write ahead log enable
 	 */
-	public boolean enableWal = false;
+	public boolean enableWal = true;
 
 	/**
 	 * When the total number of write ahead log in the file and memory reaches
@@ -27,7 +27,7 @@ public class TsfileDBConfig {
 	public int walCleanupThreshold = 500000;
 
 	/**
-	 * When a certain amount ofwrite ahead log is reached, it will be flushed to
+	 * When a certain amount of write ahead log is reached, it will be flushed to
 	 * disk. It is possible to lose at most flush_wal_threshold operations
 	 */
 	public int flushWalThreshold = 10000;