TiDB 2.1.7wall-clock dependencies in TiDB. Placement Driver, for instance, allocates timestamps based on local wall-clocks, but ensures monotonicity through Raft plus a leader lease. Clock skew between PD nodes can cause strobing the clock up and down ev- ery few milliseconds. We also used libfaketime to simulate some node clocks, both CLOCK_REALTIME and CLOCK_MONOTONIC, running up to 5x faster than oth- ers. PingCAP had written increas- ing. PingCAP and Jepsen believe this could lead to consistency anomalies when monotonic clocks are not well behaved. However, we don’t have experimental ev- idence to confirm this hypothesis.0 码力 | 9 页 | 141.29 KB | 6 月前3- TiDB: HBase分布式事务与SQL实现Google discarded the NTP in favor of its own time-keeping mechanism ● TrueTime API ○ Atomic clocks ○ GPS (global positioning system) receivers Google F1 ● ○ ○ ○ ○ ● ○ ○ ○ ○ ○ Let’s talk about0 码力 | 34 页 | 526.15 KB | 1 年前3
- TiDB v5.3 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. © 2024 PingCAP. All Rights Reserved. 29960 码力 | 2996 页 | 49.30 MB | 1 年前3
- TiDB v5.4 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. © 2024 PingCAP. All Rights Reserved. 36500 码力 | 3650 页 | 52.72 MB | 1 年前3
- TiDB v6.1 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. © 2024 PingCAP. All Rights Reserved. 44870 码力 | 4487 页 | 84.44 MB | 1 年前3
- TiDB v6.5 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. 5281 17.12.3 TTL Time to live (TTL) is a feature that allows you to manage TiDB data0 码力 | 5282 页 | 99.69 MB | 1 年前3
- TiDB v7.1 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. 17.13.3 TTL Time to live (TTL) is a feature that allows you to manage TiDB data lifetime0 码力 | 5716 页 | 104.74 MB | 1 年前3
- TiDB v7.6 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. 17.13.3 TTL Time to live (TTL) is a feature that allows you to manage TiDB data lifetime0 码力 | 6123 页 | 107.24 MB | 1 年前3
- TiDB v7.5 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. 17.13.3 TTL Time to live (TTL) is a feature that allows you to manage TiDB data lifetime0 码力 | 6020 页 | 106.82 MB | 1 年前3
- TiDB v8.1 Documentationsuch a feature is provided by PD, and in Google Spanner, this feature is provided by multiple atomic clocks and GPS. 17.13.3 TTL Time to live (TTL) is a feature that allows you to manage TiDB data lifetime0 码力 | 6321 页 | 107.46 MB | 1 年前3
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