dlg99 commented on a change in pull request #2975:
URL: https://github.com/apache/bookkeeper/pull/2975#discussion_r779193772
##########
File path:
bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/BookieImpl.java
##########
@@ -1259,7 +1261,17 @@ LedgerDescriptor getLedgerForEntry(ByteBuf entry, final
byte[] masterKey)
}
private Journal getJournal(long ledgerId) {
- return journals.get(MathUtils.signSafeMod(ledgerId, journals.size()));
+ String dividendString = Double.toString(ledgerId);
+ byte[] secretBytes = null;
+ int index = 0;
+ try {
+ secretBytes =
MessageDigest.getInstance("md5").digest(dividendString.getBytes());
+ BigInteger md5Code = new BigInteger(1, secretBytes);
Review comment:
+1 for the performance concern.
Would something like
```
final int PRIME = 31;
return journals.get(MathUtils.signSafeMod(ledgerId, PRIME *
journals.size()));
```
work well enough?
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