Disk Compaction Strategy for the Command Central Cache

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com.tc.frs.compactor.policy

Configure for OSGI-CCE. Specifies the disk compaction strategy that Command Central uses when storing files in the IBMwebMethods_directory /profiles/CCE/data/cache/persistence directory. By default, this property is set to LSNGapCompactionPolicy, which favors performance to disk storage requirements. However, when required, you can update the disk compaction policy to size-based, which favors predictable disk usage to performance, by setting:

com.tc.frs.compactor.policy=SizeBasedCompactionPolicy

Default: LSNGapCompactionPolicy

com.tc.frs.io.nio.segmentSize

Configure for OSGI-CCE. Specify only when com.tc.frs.compactor.policy=SizeBasedCompactionPolicy. Controls the size of the FRS files in bytes. The default size is 1 MB (1048576 bytes). In the example above the segment size is set to 100 MB (100 x 1024 x 1024). If you update the default value, keep in mind that when you reduce the maximum size of the FRS files, the system will create more files, which might lead to more wasted disk space.

For example, to set the size of the FRS files to 100 MB (100 x 1024 x 1024 bytes):

com.tc.frs.io.nio.segmentSize=104857600

Default: 1048576 (equivalent to 1 MB)

com.tc.frs.compactor.sizeBased.threshold

Configure for OSGI-CCE. Specify only when com.tc.frs.compactor.policy=SizeBasedCompactionPolicy. Sets when to start the on-disk data compaction process. Specify the threshold for starting the disk compaction as a decimal number, representing the percentage of disk space that the in-memory data is using. For example, to set the compaction process to start when the in-memory data is using 50% of the disk space:

com.tc.frs.compactor.sizeBased.threshold=0.50

Default: 0.50

com.tc.frs.compactor.sizeBased.amount

Configure for OSGI-CCE. Specify only when com.tc.frs.compactor.policy=SizeBasedCompactionPolicy. Controls the amount of data to be compacted at a time. Specify the amount of data as a decimal number, representing a percentage of the total amount of data. For example, to specify that 5% of the data should be compacted at a time:


com.tc.frs.compactor.sizeBased.amount=0.05

Default: 0.05