Venkateswararao Jujjuri (JV) created BOOKKEEPER-1041:
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Summary: Multiple active entrylogs
Key: BOOKKEEPER-1041
URL: https://issues.apache.org/jira/browse/BOOKKEEPER-1041
Project: Bookkeeper
Issue Type: Improvement
Components: bookkeeper-server
Reporter: Venkateswararao Jujjuri (JV)
Assignee: Charan Reddy Guttapalem
Current bookkeeper is tuned for rotational HDDs. It has one active entrylog,
and all the ledger/entries go to the same entrylog until it is rotated out.
This is perfect for HDDs as seeks and moving head allover the disk platter is
very expensive. But this is very inefficient for HDDs, as each HDD can handle
multiple parallel writers, also this method is extremely inefficient for
compaction as it causes write amplification and inefficient disk space usage.
Our proposal is to have multiple active entrylogs and a configuration param on
how many parallel entrylogs the system can have. This way one can have ability
to configure to have less (may be one) ledger per entrylog.
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