Group 1: Core Insights - Vivo's mobile internet business serves over 400 million users with applications, short videos, and advertising, processing daily data volumes in the range of hundreds of billions [1] - The transition from Kafka to Apache Pulsar addresses scalability and performance issues, enabling effective management of massive data traffic and improving operational efficiency [3][4] Group 2: Business Challenges - Vivo's original Kafka-based messaging system faced limitations due to increasing topic and partition numbers, leading to performance degradation and high operational costs [3] - The inability of Kafka to dynamically scale and the reliance on partition numbers for performance created significant challenges during traffic spikes [3] Group 3: Technical Selection - Apache Pulsar was chosen for its advantages, including a stateless broker architecture that supports rapid scaling and a unique bundle mechanism that manages large numbers of topics effectively [4] - Pulsar's support for multiple consumption modes enhances its ability to handle varying traffic demands and ensures message order [4] Group 4: Implementation and Optimization - Vivo optimized Pulsar's bundle management and data retention strategies, improving data distribution and monitoring capabilities [5][6] - Adjustments to load balancing and client performance parameters significantly enhanced the system's ability to handle high message volumes [6] Group 5: Didi's Big Data Operations - Didi's big data team adopted Apache Pulsar in 2021, replacing the DKafka system and resolving long-standing operational challenges [7][9] - The transition to Pulsar improved performance, cost efficiency, and reliability, addressing issues such as disk I/O bottlenecks and complex load balancing [8][9] Group 6: Didi's Implementation and Optimization - Didi optimized hardware configurations and utilized Pulsar's ensemble mechanism to ensure balanced data distribution and efficient resource utilization [10] - The system's design allows for quick scaling and fault recovery, ensuring continuous service during peak loads and failures [10][12]

Group 1 - The European Commission plans to inquire about major tech companies like Apple, Google, Microsoft, and Booking.com regarding their measures to prevent online financial fraud [1][2] - Henna Virkkunen, the European Commission's technology affairs chief, stated that financial fraud has become a new priority for the Commission, aiming to ensure that tech companies are doing their utmost to detect and prevent fraudulent activities [2] - The inquiry will focus on how Apple and Google manage fake applications in their app stores, how Google and Microsoft handle false search results, and how Booking.com addresses fake property listings [2] Group 2 - The European Commission is currently requesting information but may proceed with investigations and impose fines, with the Digital Services Act allowing fines up to 6% of a company's global annual revenue [2]

Market Overview - Major U.S. index futures are showing positive movement, with Dow futures up 0.20%, S&P 500 futures up 0.52%, and Nasdaq futures up 1.12% [1] Chinese Stocks - Chinese stocks are experiencing a pre-market rally, with Alibaba up 2.91%, Pinduoduo up 2.21%, NetEase up 4.6%, JD.com up 1.28%, Trip.com up 3.67%, Baidu up 1.91%, and Li Auto up 3.63% [2] AI Talent Acquisition - Microsoft is intensifying efforts to recruit AI talent from Meta, implementing a competitive hiring process to match Meta's lucrative compensation packages, including multi-million dollar signing bonuses [2] Economic Outlook - UBS has adopted a rare "firmly bearish" stance on the U.S. economy, the dollar, and U.S. equities, predicting a sharp slowdown in Q4 GDP growth to 0.9% from 2.0% in Q2, significantly below market expectations. UBS maintains a long-term bearish view on the dollar and warns of risks related to overvaluation in U.S. equities, particularly in tech stocks [2] Stock Price Adjustments - Morgan Stanley has lowered the target price for Eli Lilly from $1,135 to $1,028 while maintaining an "overweight" rating [2] Webtoon Entertainment - Webtoon Entertainment, a subsidiary of South Korea's Naver, saw its stock rise over 40% in pre-market trading after reporting better-than-expected Q2 earnings and announcing a partnership with Disney. JPMorgan has raised its target price from $9 to $14 per share [3] Apple Response - Apple has responded to Elon Musk's antitrust allegations, asserting that its App Store operates on fair principles without favoritism. Apple emphasized that its platform uses objective standards for app recommendations to ensure a safe environment for users and fair competition for developers [3] Cryptocurrency IPO - Bullish, a cryptocurrency exchange operator and owner of CoinDesk, successfully raised $1.1 billion through its IPO, selling 30 million shares at $37 each, exceeding the previously advertised price range of $32 to $33 [3] CoreWeave Financials - CoreWeave, known as "NVIDIA's favorite," saw its stock drop nearly 10% after reporting a significant increase in adjusted net losses for Q2, reaching $130.8 million compared to $5 million in the same period last year, with analysts expecting a loss of $96.3 million [4]

Group 1 - The core viewpoint is that Apple is expected to receive approval from the EU antitrust authority regarding its app store fees and rules, potentially avoiding daily fines [1] Group 2 - The approval would allow Apple to continue its current business practices without facing penalties [1] - This development highlights the ongoing scrutiny of major tech companies by regulatory bodies in Europe [1] - The outcome may set a precedent for how app store policies are regulated in the future [1]

Core Viewpoint - Apple is expected to receive approval from the EU antitrust authority regarding its app store fees and rules, which will help the company avoid daily fines. A decision is anticipated in the coming weeks [1] Group 1 - Apple is likely to gain approval from the EU for its app store practices [1] - The approval will assist Apple in avoiding potential daily fines [1] - A decision from the EU is expected within the next few weeks [1]

Core Insights - Apple has modified its App Store rules in the European Union to comply with antitrust orders [1] Group 1 - The changes in the App Store rules are a direct response to regulatory pressures from the European Union [1]

Core Viewpoint - Apple is preparing to adjust its App Store to appease EU antitrust regulators and potentially avoid further fines related to the Digital Markets Act (DMA) [1] Group 1: Regulatory Adjustments - Apple plans to propose changes by June 26 to make it easier for third-party developers to direct users outside of Apple's ecosystem for software purchases [1] - This commitment follows weeks of tense discussions with EU regulators and aims to address alleged violations of the DMA [1] Group 2: Potential Consequences - If Apple fails to submit the proposals by the deadline, the European Commission will prepare a formal charge against the company [1] - In April, both Apple and Meta were found to have violated the DMA, leading to significant regulatory scrutiny [1]

Core Viewpoint - Apple is preparing to adjust its App Store to avoid further fines from the European Union, which issued a deadline on June 26 for compliance with the Digital Markets Act (DMA) [1] Group 1 - The European Union has issued a final ultimatum to Apple regarding compliance with the DMA [1] - The adjustments to the App Store are aimed at preventing additional penalties from the EU [1]

Core Viewpoint - Apple is preparing to adjust its App Store policies to avoid incurring further fines from the European Union [1] Group 1 - The adjustments are a response to regulatory pressures from the EU [1] - The company aims to enhance compliance with EU regulations to mitigate financial penalties [1]

Core Viewpoint - Apple is expected to make concessions to the European Union in negotiations regarding its App Store practices [1] Group 1 - The negotiations are part of ongoing discussions between Apple and EU regulators [1] - The potential concessions may impact Apple's business model and revenue from the App Store [1]