Apache BookKeeper 是一個針對實時工作負載優化的可擴充套件、高容錯和低延遲的儲存服務，已作為基礎儲存服務被用於構建各種可靠的服務，同時也是 Apache DistributedLog 的日誌段儲存和 Apache Pulsar 的訊息儲存。

Apache BookKeeper 4.8.1 已釋出，更新亮點：

• Use default metrics registry in Prometheus exporter

• Don’t cache Bookie hostname DNS resolution forever

• Reduce stack traces in logs for common cases

• Ledger deletion racing with flush can cause a ledger index to be resurrected

• EntryMemTable.newEntry retains reference to passed ByteBuffer array, can cause corruption on journal replay

具體更新細節可查閱：

• https://bookkeeper.apache.org/docs/4.8.1/overview/releaseNotes/

下載地址：

• https://bookkeeper.apache.org/releases/