Revision d3d20dcdca9dc79d893a03dfa611fb1055c28f96 authored by Sagar Vemuri on 11 April 2019, 02:24:25 UTC, committed by Facebook Github Bot on 11 April 2019, 02:31:18 UTC
Summary: Introducing Periodic Compactions. This feature allows all the files in a CF to be periodically compacted. It could help in catching any corruptions that could creep into the DB proactively as every file is constantly getting re-compacted. And also, of course, it helps to cleanup data older than certain threshold. - Introduced a new option `periodic_compaction_time` to control how long a file can live without being compacted in a CF. - This works across all levels. - The files are put in the same level after going through the compaction. (Related files in the same level are picked up as `ExpandInputstoCleanCut` is used). - Compaction filters, if any, are invoked as usual. - A new table property, `file_creation_time`, is introduced to implement this feature. This property is set to the time at which the SST file was created (and that time is given by the underlying Env/OS). This feature can be enabled on its own, or in conjunction with `ttl`. It is possible to set a different time threshold for the bottom level when used in conjunction with ttl. Since `ttl` works only on 0 to last but one levels, you could set `ttl` to, say, 1 day, and `periodic_compaction_time` to, say, 7 days. Since `ttl < periodic_compaction_time` all files in last but one levels keep getting picked up based on ttl, and almost never based on periodic_compaction_time. The files in the bottom level get picked up for compaction based on `periodic_compaction_time`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5166 Differential Revision: D14884441 Pulled By: sagar0 fbshipit-source-id: 408426cbacb409c06386a98632dcf90bfa1bda47
1 parent ef0fc1b
File | Mode | Size |
---|---|---|
env.cc | -rw-r--r-- | 11.5 KB |
env_basic_test.cc | -rw-r--r-- | 12.6 KB |
env_chroot.cc | -rw-r--r-- | 11.6 KB |
env_chroot.h | -rw-r--r-- | 684 bytes |
env_encryption.cc | -rw-r--r-- | 33.4 KB |
env_hdfs.cc | -rw-r--r-- | 18.9 KB |
env_posix.cc | -rw-r--r-- | 34.1 KB |
env_test.cc | -rw-r--r-- | 53.7 KB |
io_posix.cc | -rw-r--r-- | 29.7 KB |
io_posix.h | -rw-r--r-- | 8.5 KB |
mock_env.cc | -rw-r--r-- | 20.7 KB |
mock_env.h | -rw-r--r-- | 4.2 KB |
mock_env_test.cc | -rw-r--r-- | 2.6 KB |
posix_logger.h | -rw-r--r-- | 5.3 KB |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...