second behind and make the adjustment then. • BUT as of Windows 10 October 2018 update and Windows Server 2019, Windows OS will now track leap seconds! • HOWEVER, they will not track leap seconds prior a tzdb • There also exists a type called tzdb_list which contains a list of tzdb objects. • Since tzdb objects can be tied to newer versions of the time zone data, this list can contain various

pointers protect access to objects that may be removed concurrently. SAFE RECLAMATION Concurrency TS2 Essential Hazard Pointer Interface Base class for protectable objects template class time) Asynchronous Reclamation • Asynchronous reclamation is invoked when the number of retired objects reaches some threshold: • In the Folly library: • The threshold is the max of 1000 and twice the Extract retired objects from lists in the (global) domain structure. • Read hazard pointer values • Match addresses of retired objects with values read from hazard pointers. • Push matched objects back into

x(N, &mem); std::pmr::vector y(N, &mem); // … Memory Allocation 21 |Avoid References to Objects Not in Unified Memory void add_cpu( int n, vector const& x, vector& y) { gsl::span y) { for (int i = 0; i < n; i++) y[i] = x[i] + y[i]; } 22 |Avoid References to Objects Not in Unified Memory struct add_ref { std::vector const& a_; std::vector performance of your CPU code by: • Reducing the number of calls to the allocator. • Improving locality of objects. • Providing a way to instrument your code and identify inefficiencies. • Requires your std library

modified request • 模拟数据规则 • 自动化测试 • https://github.com/wasmmock/ wasm_mock_server • 用 rust 打包所有测试需求 Wasm mock server Why use rust ？ Software testing tool • 模拟数据规则 • 自动化测试 • Company's own protocol platform • Support HTTP POST wasm API • Support websocket stand in for wasm API 抓包 - Wasm Mock Server wasm 工具 does not invent the wheel 软件测试工具 • 模拟数据规则 • 自动化测试 ModifyRequest(req *http.Request) error{ Response) error{ … res_,err:=wasm.Invoke(ctx,res.url.path, req_payload) … res = res_ } Wasm mock server 用了 Google martian 软件测试工具 • Websocket TCP mitm 例 子 extern crate wapc_guest as guest; use guest::prelude::*;

Request Cert (SDS)) 3. CSR Auth: JWT 4. Cert signed with SPIFFE format Istio-proxy CA server #IstioCon Istio identity – how to get configuration ● Format: "spiffe:///ns/server side mTLS mTLS in Istio - PeerAuthenticati on Using ingress port and ingress host to send request: peer-authentication only defines behavior of server side and auto-mTLS is on by default Access productpage 1) Apply peer-authentication to enable server side mTLS mTLS in Istio - PeerAuthenticati

being on the same thread. Too much work on main thread • Android nested layouts • Functions and objects defined in loops • Statements like debugger, eval, with. • How to access Native Engine information

disasterConformity • Software people are not alone in facing complexity • Physics deals with terribly complex objects even at the fundamental level, but • Einstein argued there must simplified explanations, because

Files High Compression (column store + LZ4) • Typically 100x faster than MySQL on Single Server • Semi-Linear Scalability to 100s of nodes High Performance © 2018 Percona. 8 MySQL Wire User Account etc Has information about Connection Events Available in MySQL Enterprise, Percona Server, MariaDB © 2018 Percona. 18 Audit Log Record Example {"audit_record":{"name":"Query","record localhost []","host":"localhost","os_user":"","ip":"","db":"sbtest"}} © 2018 Percona. 19 Percona Server Configuration • Install Audit Plugin • INSTALL PLUGIN audit_log SONAME 'audit_log.so'; • Configure

Spaceship Operator <=>  Official name: three-way comparison operator  Three-way: comparing 2 objects and then comparing result with 0  (a <=> b) < 0 // true if a < b  (a <=> b) > 0 // true if

 We already have heterogeneous lookup for associative containers  Avoids creating temporary objects of type key during lookups  E.g.: lookup with C-style string for container with std::string as