a full set of 3 replicas, cannot tolerate the loss of any single node. Conferring with the PingCAP team, we believe this issue only affects new clusters; once TiDB has stabi- lized, split regions should skew in February 2017, and when Jepsen discussed their initial read skew histories with the PingCAP team, PingCAP’s response was the same: TiDB only offers snapshot isolation, and users should use select funded by PingCAP, and conducted in accordance with the Jepsen ethics policy. Our thanks to the PingCAP team for their assistance with this analysis—especially Shen Taining, Tang Liu, Morgan Tocker, Shuaipeng

Pythian Group Inc., 2019 ●Internal Principal Consultant @ Pythian. ●Pager-carrying, buck stops at my team. ●OSDB Practice (MySQL/MariaDB, MongoDB, Cassandra, …). ●19 years of MySQL experience. �2 About

�� TiDB �������� ���@PingCAP About Me ● �������@PingCAP ● ����������� BigData Infra Team Lead ● ���������������SQL on Hadoop ��� �������� ● ����������������������������� ● ����������� Data Sink

improvement in v6.2 Wei Wan @ PingCAP About Me Wei Wan, work at PingCAP, as the leader of OLAP Storage team. Over 11 years of experience in game, e-commerce, mobile apps, and database development. TiDB

state-of-the-art data solutions, like this, implemented by experts in the field, and supported by a dedicated team of professionals. To learn more, visit www.iconic.inc

writable again. It is recommended to perform the feature-related operations with the support of the TiDB team. User document, #10483 44 2.2.2.5 Data migration • DM replication performance enhanced Supports unavailability. • It is recommended to perform the feature-related operations with the support from the TiDB team. If any misoperation is performed, it might be hard to recover the cluster. When permanently damaged 000 Milliseconds is published by the author Bren- dan Gregg and the Netflix Performance Engineering team. All tools used can be obtained from the official release of Linux. You can analyze outputs of the

unavailability. • It is recommended to perform the feature-related operations with the support from the TiDB team. If any misoperation is performed, it might be hard to recover the cluster. When permanently damaged 000 Milliseconds is published by the author Bren- dan Gregg and the Netflix Performance Engineering team. All tools used can be obtained from the official release of Linux. You can analyze outputs of the center. At this time, manual intervention is required with professional tools. You can contact the TiDB team for a recovery solution. • If the DR center fails and a few Voter replicas are lost, the cluster

000 Milliseconds is published by the author Bren- dan Gregg and the Netflix Performance Engineering team. All tools used can be obtained from the official release of Linux. You can analyze outputs of the center. At this time, manual intervention is required with professional tools. You can contact the TiDB team for a recovery solution. • If the DR center fails and a few Voter replicas are lost, the cluster replicas are lost, manual intervention is required with professional tools. You can contact the TiDB team for a recovery solution. 697 10.4 Read Historical Data 10.4.1 Use Stale Read (Recommended) 10

000 Milliseconds is published by the author Bren- dan Gregg and the Netflix Performance Engineering team. All tools used can be obtained from the official release of Linux. You can analyze outputs of the into the TiUP mirrors? TiUP does not support third-party components for the time being, but the TiUP Team has developed the TiUP component development specifications and is developing the tiup- publish component can manually copy the missing files from other nodes to the new node for the time being. The TiUP team will complete the missing components during the migration process. 11.4.7 TiUP Reference TiUP serves

CoreOS Databricks Docker Github Grafana gRPC Jepsen Kubernetes Namazu Prometheus RedHat RocksDB Team Rust Team 8cbx Akihiro Suda aliyx alston111111 andelf Andy Librian Arthur Yang astaxie Bai, Yang bailaohe