CloverETL internal settings (defaults) are
stored in the
defaultProperties file located in the
This source file contains
various parameters that are loaded at run-time and used during
We do not recommend changing values in this file.
If you need to change the default setting, create a local file with only those properties you need to override and place the file in the project directory. To instruct CloverETL to retrieve the properties from this local file, go to → → → and either define the path to the file in the CloverETL Engine Properties field or put the following parameter in the VM parameters field:
Here we present some of the properties and their values as they are presented in the
Record.RECORD_LIMIT_SIZE = 33554432
It limits the maximum size of a record. Theoretically, the limit is tens of MBs, but you should keep it as low as possible for an easier error detection. See Edge Memory Allocation for more details on memory demands.
Record.FIELD_LIMIT_SIZE = 33554432
It limits the maximum size of one field within a record. See Edge Memory Allocation for more details on memory demands.
Record.RECORD_INITIAL_SIZE = 65536
It sets the initial amount of memory allocated to each record.
The memory can grow dynamically
Record.RECORD_LIMIT_SIZE, depending on how memory-greedy an
edge is. See
Edge Memory Allocation.
Record.FIELD_INITIAL_SIZE = 65536
Sets the initial amount of memory allocated to each field within a record. The memory can grow dynamically
Record.FIELD_LIMIT_SIZE, depending on how memory-greedy an
edge is. See
Edge Memory Allocation.
Record.DEFAULT_COMPRESSION_LEVEL = 5
This sets the compression level for compressed data fields (
DEFAULT_INTERNAL_IO_BUFFER_SIZE = 32768
It determines the internal buffer size the components allocate for I/O operations. Increasing this value affects performance negligibly.
USE_DIRECT_MEMORY = true
The clover engine intensively uses direct memory for data records manipulation.
For example underlying memory of CloverBuffer
(container for serialized data records) is allocated outside
of the Java heap space in direct memory.
This attribute is by default
true in order to improve performance.
However, direct memory is out of control of a java virtual machine,
so try to turn off usage of direct memory in case an OutOfMemory exception occurs.
DEFAULT_DATE_FORMAT = yyyy-MM-dd
DEFAULT_TIME_FORMAT = HH:mm:ss
DEFAULT_DATETIME_FORMAT = yyyy-MM-dd HH:mm:ss
DataParser.DEFAULT_CHARSET_DECODER = UTF-8
DataFormatter.DEFAULT_CHARSET_ENCODER = UTF-8
Lookup.LOOKUP_INITIAL_CAPACITY = 512
The initial capacity of a lookup table when created without specifying the size.
DataFieldMetadata.DECIMAL_LENGTH = 12
It determines the default maximum precision of decimal data field metadata. Precision is the number of digits in a number, e.g., the number 123.45 has a precision of 5.
DataFieldMetadata.DECIMAL_SCALE = 2
It determines the default scale of decimal data field metadata. Scale is the number of digits to the right of the decimal point in a number, e.g., the number 123.45 has a scale of 2.
Record.MAX_RECORD_SIZE = 33554432
This is a deprecated property. Nowadays, you should use
It limits the maximum size of a record. Theoretically, the limit is tens of MBs, but you should keep it as low as possible for an easier error detection.
You can define locale that should be used as the default one.
The setting is the following:
By default, system locale is used by CloverETL.
If you uncomment this row you can set the
Similarly, the default time zone can be overridden by uncommenting the following entry:
See the Time Zone section for more information about time zones.
In 4.4.0-M2, the default encoding was changed from ISO-8859-1 to UTF-8.