Matteo Merli created BOOKKEEPER-963:
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Summary: Allow to use multiple journals in bookie
Key: BOOKKEEPER-963
URL: https://issues.apache.org/jira/browse/BOOKKEEPER-963
Project: Bookkeeper
Issue Type: Improvement
Reporter: Matteo Merli
Assignee: Matteo Merli
Fix For: 4.5.0
By configuring multiple journals, we can take advantage of the IO of multiple
disks to increase the write throughput of a single bookie.
Each journal will have its own journal and sync threads and writes will be
assigned to a particular journal by hashing on the ledger id.
In addition to using multiple physical disks, there can improvements even by
using multiple journal on a single SSD device, because these disks can handle
well multiple concurrent writes in different blocks of the disk.
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