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src/leveldb/include/leveldb/options.h
| Show First 20 Lines • Show All 106 Lines • ▼ Show 20 Lines | struct Options { | ||||
| // Number of keys between restart points for delta encoding of keys. | // Number of keys between restart points for delta encoding of keys. | ||||
| // This parameter can be changed dynamically. Most clients should | // This parameter can be changed dynamically. Most clients should | ||||
| // leave this parameter alone. | // leave this parameter alone. | ||||
| // | // | ||||
| // Default: 16 | // Default: 16 | ||||
| int block_restart_interval; | int block_restart_interval; | ||||
| // Leveldb will write up to this amount of bytes to a file before | |||||
| // switching to a new one. | |||||
| // Most clients should leave this parameter alone. However if your | |||||
| // filesystem is more efficient with larger files, you could | |||||
| // consider increasing the value. The downside will be longer | |||||
| // compactions and hence longer latency/performance hiccups. | |||||
| // Another reason to increase this parameter might be when you are | |||||
| // initially populating a large database. | |||||
| // | |||||
| // Default: 2MB | |||||
| size_t max_file_size; | |||||
| // Compress blocks using the specified compression algorithm. This | // Compress blocks using the specified compression algorithm. This | ||||
| // parameter can be changed dynamically. | // parameter can be changed dynamically. | ||||
| // | // | ||||
| // Default: kSnappyCompression, which gives lightweight but fast | // Default: kSnappyCompression, which gives lightweight but fast | ||||
| // compression. | // compression. | ||||
| // | // | ||||
| // Typical speeds of kSnappyCompression on an Intel(R) Core(TM)2 2.4GHz: | // Typical speeds of kSnappyCompression on an Intel(R) Core(TM)2 2.4GHz: | ||||
| // ~200-500MB/s compression | // ~200-500MB/s compression | ||||
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