YUNSHAN Networks Technology Co., Ltd. All rights reserved. 云原生应用可观测性实践 向阳 @ 云杉网络 2021-12-08 simplify the growing complexity © 2021, YUNSHAN Networks Technology Co., Ltd. All rights reserved. 可观测性 - cheap, show me the demo! 目录 simplify the growing complexity © 2021, YUNSHAN Networks Technology Co., Ltd. All rights reserved. 可观测性的成熟度模型 1.0 基础支柱 2.0 ? 3.0 ? simplify the growing complexity © 2021 Bourgon simplify the growing complexity © 2021, YUNSHAN Networks Technology Co., Ltd. All rights reserved. 开箱即用的解决方案 Metrics, tracing, and logging 2017.02.21 Peter Bourgon simplify the growing

role of Boolean algebra in composing matchers. Understanding Boolean implication and using it to simplify matchers. This talk is a series of baby steps, each building on the previous. And by the end, containing tautologies or contradictions, or at least common parts… How does the library know how to simplify things like: less_than<5> or greater_equal<5> less_than<5> and less_than<7> not less_than<5> 34OK, simplify You're thinking: let's simplify the expression with our "normal" rules of Boolean algebra. But… how? What does the library need to know about matchers in order to simplify them? And

降低资源开销：MultistageCodec 4. 统一数据平台的落地思路及案例 构建统一的云原生应用可观测性数据平台 看云网更清晰 Simplify the growing complexity. 统一的可观测性数据平台 telegraf 看云网更清晰 Simplify the growing complexity. 挑战：数据孤岛、资源开销 数据 孤岛 资源消耗 telegraf 1 降低资源开销：MultistageCodec 4. 统一数据平台的落地思路及案例 构建统一的云原生应用可观测性数据平台 看云网更清晰 Simplify the growing complexity. OpenTelemetry的方法 统一的上下文 以追踪为核心 看云网更清晰 Simplify the growing complexity. OpenTelemetry的方法 Tag, Exemplars (TraceID TraceID, SpanID TraceID & Tag 看云网更清晰 Simplify the growing complexity. 数据打通并不简单 ① Trace与「非Request scope」的Metrics 例如：响应Request A的实例在一段时间内做了多少次GC？ ① 看云网更清晰 Simplify the growing complexity. 数据打通并不简单 ②

Phases of Planning @2024 OpenPie. All rights reserved. OpenPie Confidential • Preprocessing ØSimplify the query if possible; collect information • Scan/join planning ØDecide how to implement FROM/WHERE Confidential • Simplify scalar expressions • Expand simple SQL functions in-line • Simplify join tree Early Preprocessing @2024 OpenPie. All rights reserved. OpenPie Confidential • Simplify function calls 2 + 2 => 4 Simplify Scalar Expressions @2024 OpenPie. All rights reserved. OpenPie Confidential • Simplify boolean expressions "x OR true" => "true" "x AND false" => "false" Simplify Scalar Expressions

principles • Things that simplify C++ are good 44Underlying principles • Contributors to this effort have committed to the following guiding principles • Things that simplify C++ are good • Things that Contributors to this effort have committed to the following guiding principles • Things that simplify C++ are good • Things that make C++ more teachable are good • Avoid negative performance impacts Contributors to this effort have committed to the following guiding principles • Things that simplify C++ are good • Things that make C++ more teachable are good • Avoid negative performance impacts

esimp : simplify expressions (by evaluation/normalization) in goal esimp at : simplify hypothesis in context esimp at * : simplify everything esimp [] : unfold definitions and simplify expressions expressions in goal esimp [] at : unfold definitions and simplify hypothesis in context esimp [] at * : unfold definitions and simplify everything unfold : similar to (esimp ) fold

Integration Testing The Spring TestContext Framework provides several abstract support classes that simplify the writing of integration tests. These base test classes provide well-defined hooks into the testing package contains JdbcTestUtils, which is a collection of JDBC- related utility functions intended to simplify standard database testing scenarios. Specifically, JdbcTestUtils provides the following static TransactionalDevTestConfig { } Then we can use our custom @TransactionalDevTestConfig annotation to simplify the configuration of individual JUnit 4 based test classes, as follows: Java @RunWith(SpringRunner

needs to write to some ‘shared value’ to sum the total. ● On the example on the right, let’s simplify and just have 1000 threads work together to increment a value1000 threads working together (2/4) needs to write to some ‘shared value’ to sum the total. ● On the example on the right, let’s simplify and just have 1000 threads work together to increment a value Here we launch and join our 1000 needs to write to some ‘shared value’ to sum the total. ● On the example on the right, let’s simplify and just have 1000 threads work together to increment a value Each thread calls ‘increment_shared_value’

by saying “to prove the forward direction, unfold the definition, apply the previous lemma, and simplify.” Just as these are instructions that tell the reader how to find the relevant proof, tactics are h2, transitivity a, symmetry, assumption, assumption end The repeat combinator can be used to simplify the last two lines: example : ∀ a b c : N, a = b → a = c → c = b := begin intros, apply eq.trans mathematics library, which we need to explicitly import. As with rw, you can use the keyword at to simplify a hypothesis: variables (x y z : N) (p : N → Prop) example (h : p ((x + 0) * (0 + y * 1 + z *