包阅导读总结
1. 关键词：Spanner、dual-region、data residency、availability、failovers
2. 总结：
Spanner 是谷歌的全球分布式数据库，现推出双区域配置以满足数据驻留要求。新配置在澳大利亚、德国、印度和日本可用，能在保证高可用性和零恢复点目标的同时，确保数据在所选国家内。
3. 主要内容：
– Spanner 是谷歌的全托管、全球分布式数据库，处理每秒超 40 亿次查询，为全球各行业客户及谷歌内部提供服务。
– 此前在仅有两个谷歌云区域的国家，受限于区域配置及 99.99%的可用性。
– 现在新的双区域配置在澳大利亚、德国、印度和日本可用，能在符合数据驻留要求的同时达到 99.999%的可用性。
– 双区域配置从底层构建，以确保提供与跨三个区域的多区域配置相同的高可用性和零恢复点目标保证。
– 如在印度的双区域配置，实例数据复制到孟买和德里，每个区域包含三个副本。
思维导图：
文章来源：cloud.google.com
作者：Nitin Sagar
发布时间：2024/7/22 0:00
语言：英文
总字数：581字
预计阅读时间：3分钟
评分：88分
标签：Spanner,谷歌云,数据库,数据驻留,数据合规
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Spanner is Google’s fully managed, globally distributed database with high throughput and virtually unlimited scale. Spanner processes over 4 billion queries per second at peak. With features such as automatic sharding, zero downtime, and strong consistency, Spanner powers demanding, global workloads — not only across customers in financial services, gaming, retail, and other industries but also Google internally — that are both relational and non-relational.
Previously, to maintain data residency in countries with only two Google Cloud regions, you were restricted to regional Spanner configurations with 99.99% availability. That’s because Spanner multi-region configurations require three regions, one of which would be located outside the country. You can now take advantage of Spanner’s industry-leading 99.999% availability while complying with data residency requirements using the new Spanner dual-region configurations. The new dual-region configurations – now available in Australia, Germany, India, and Japan – help ensure your data resides within the selected country.
Under the hood and managing failovers
The Spanner dual-region configurations are built from the ground up to help ensure that we can offer the same high availability and zero recovery-point objective (RPO) guarantees as the Spanner multi-region configurations that typically span across three different regions.
Let’s take an example of a dual-region configuration and examine a Spanner instance running in the newly launched configuration in India. These instances replicate data to Mumbai and Delhi. Each of the two regions contains three replicas, two of which are read/write replicas and one of which is a witness replica. For both regions combined, the Spanner instance contains a total of six replicas. This configuration is called dual-region mode.
