lordcheng10 opened a new pull request, #3681:
URL: https://github.com/apache/bookkeeper/pull/3681
### Motivation
When dbStorage_directIOEntryLogger=true, add support for entryLogPerLedger.
### Changes
1. Add a new DirectEntryLoggerForEntryLogPerLedger class extended from
DirectEntryLogger;
2. In DbLedgerStorage, when building the EntryLogger object, judge whether
entryLogPerLedgerEnabled is enabled:
```
if (conf.isEntryLogPerLedgerEnabled()) {
entrylogger = new
DirectEntryLoggerForEntryLogPerLedger(conf, ledgerDir,
new EntryLogIdsImpl(ledgerDirsManager, slog),
new NativeIOImpl(),
allocator, entryLoggerWriteExecutor,
entryLoggerFlushExecutor,
conf.getEntryLogSizeLimit(),
conf.getNettyMaxFrameSizeBytes() - 500,
perDirectoryTotalWriteBufferSize,
perDirectoryTotalReadBufferSize,
readBufferSize,
numReadThreads,
maxFdCacheTimeSeconds,
slog, statsLogger);
} else {
entrylogger = new DirectEntryLogger(ledgerDir, new
EntryLogIdsImpl(ledgerDirsManager, slog),
new NativeIOImpl(),
allocator, entryLoggerWriteExecutor,
entryLoggerFlushExecutor,
conf.getEntryLogSizeLimit(),
conf.getNettyMaxFrameSizeBytes() - 500,
perDirectoryTotalWriteBufferSize,
perDirectoryTotalReadBufferSize,
readBufferSize,
numReadThreads,
maxFdCacheTimeSeconds,
slog, statsLogger);
}
```
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