# Ethereum Schedules Glamsterdam Upgrade Activation on Hoodi Testnet for October 26 Source: TechNewsList (https://technewslist.com) Canonical URL: https://technewslist.com/en/article/ethereum-glamsterdam-upgrade-schedules-hoodi-testnet-activation-2026-10-20-night Section: DeFi & Crypto (https://technewslist.com/en/defi-crypto) Author: TechNewsList Language: en Published: 2026-10-20T17:51:15.956+00:00 Updated: 2026-10-20T17:51:16.153139+00:00 > Ethereum core developers lock in October 26 for the Glamsterdam hard fork on the Hoodi testnet, increasing the block gas limit to 200 million and introducing enshrined PBS. ## TL;DR - Ethereum core developers scheduled the Glamsterdam upgrade for Hoodi testnet activation on October 26, 2026. - The testnet activation coincides with raising the target block gas limit to two hundred million gas units. - The upgrade introduces Enshrined Proposer-Builder Separation to eliminate reliance on external block production relays. - Block-level access lists are included to provide deterministic account access patterns and accelerate validation. - Rigorous testnet trials on Sepolia and Hoodi will determine the definitive mainnet activation timeline for node clients. ## Key points - The Glamsterdam hard fork will trigger at Hoodi testnet epoch 132,352 and slot 4,235,264 on October 26. - Block gas limits will surge to 200 million, providing a more than threefold increase in testnet transaction throughput. - Enshrined PBS integrates block building directly into protocol consensus, reducing MEV centralization risks. - Block access lists allow validator nodes to pre-fetch storage slots and execute transaction batches in parallel. - Mainnet deployment schedules will be determined following comprehensive stability monitoring on Hoodi and Sepolia. ## What happened On October 20, 2026, during the All Core Developers consensus coordination call, Ethereum technical architects formally finalized the execution schedule for the Glamsterdam hard fork on the Hoodi testnet. The upgrade is locked to trigger precisely on October 26, 2026, at 17:42:48 UTC, corresponding to epoch 132,352 and slot 4,235,264. Crucially, client release teams agreed to couple the network transition with an immediate increase of the Hoodi block gas limit to two hundred million gas units, representing an aggressive more than threefold expansion over legacy network capacity. The activation represents the second major milestone in the Glamsterdam testnet rollout, following initial staging on the Sepolia network earlier in the month. Lead developer Tim Beiko confirmed that all major execution and consensus client implementations, including Geth, Nethermind, Besu, Lighthouse, and Prysm, have integrated the complete Ethereum Improvement Proposal (EIP) set necessary for Hoodi deployment, clearing the runway for extensive stress testing under simulated high-load conditions. ![Decentralized cryptographic assets illustrating blockchain network transaction validation and gas accounting models.](https://rkhynbcsbnkkcwgexzwg.supabase.co/storage/v1/object/public/media/api/1792518663962-m5insi-ethereum-glamsterdam-upgrade-schedules-hoodi-testnet-activation-2026-10-20-night-inside-1-820bd28085.webp) *Decentralized cryptographic assets illustrating blockchain network transaction validation and gas accounting models.* The Glamsterdam release introduces foundational enhancements to Ethereum's execution environment, incorporating Enshrined Proposer-Builder Separation (ePBS), block-level access lists (BALs), and comprehensive gas accounting overhauls that collectively modernize the protocol's layer-one scaling architecture. ## Why it matters For the decentralized finance ecosystem, the Glamsterdam upgrade represents one of the most critical structural overhauls since the Dencun hard fork introduced blob transactions. As decentralized exchanges, automated market makers, and real-world asset tokenization protocols process escalating transaction volumes, baseline layer-one capacity has faced recurring congestion during periods of market volatility. Raising the block gas limit to two hundred million on Hoodi allows developers to empirically assess state growth dynamics, validator propagation latency, and uncle block rates under heavy throughput. Beyond raw throughput, the enshrining of Proposer-Builder Separation directly addresses systemic centralization vulnerabilities created by external maximal extractable value (MEV) relays. By moving builder auctions and payload construction directly into the core consensus rules, Ethereum significantly reduces its reliance on third-party middleware relays, reinforcing network censorship resistance and decentralization guarantees. Furthermore, introducing block-level access lists establishes the prerequisite architectural foundation for parallel transaction execution across Ethereum client engines. Deterministically identifying which state accounts and storage slots will be modified prior to execution enables client implementations to unlock multithreaded processing, laying the groundwork for substantial long-term scalability. ## Technical details The technical architecture of Glamsterdam is characterized by three coordinated protocol improvements. Foremost among them is Enshrined Proposer-Builder Separation (ePBS), specified under EIP-7732. Under the legacy paradigm, block proposers rely on off-chain MEV-Boost relays to source profitable execution payloads from specialized block builders. With ePBS, the Ethereum consensus layer natively handles the commitment-payload split, allowing proposers to commit to a builder's bid on-chain while withholding validation until the execution payload is published by an assigned payload attestation committee. ![Physical crypto infrastructure node representing validator operators and distributed network participants running Ethereum client software.](https://rkhynbcsbnkkcwgexzwg.supabase.co/storage/v1/object/public/media/api/1792518667345-zpjfes-ethereum-glamsterdam-upgrade-schedules-hoodi-testnet-activation-2026-10-20-night-inside-2-b15f981567.webp) *Physical crypto infrastructure node representing validator operators and distributed network participants running Ethereum client software.* To sustain the expanded two hundred million gas limit without inducing validator node desynchronization, Glamsterdam implements block-level access lists (BALs). Blocks constructed under the new specification must include an explicit manifest declaring every address, storage key, and account balance modified within the block. Validator nodes ingest this metadata to pre-warm CPU caches and execute state transitions across parallel processing cores rather than sequentially executing opcodes. Additionally, Glamsterdam recalibrates gas costs associated with state growth and cryptographic precompiles. State creation operations, such as creating new contract storage slots, receive higher relative gas pricing to discourage unbounded disk bloat, while mathematical operations utilized heavily by zero-knowledge rollup verifiers receive cost reductions to streamline layer-two settlement efficiency. ## Market / industry impact The advancement of the Glamsterdam roadmap generates widespread optimism across digital asset markets and layer-two rollups. As layer-one transaction capacity expands and execution efficiency improves, rollup operators anticipate lower batch posting overhead and enhanced settlement finality, strengthening the economics of decentralized finance platforms. Infrastructure providers and staking operators are actively preparing for elevated hardware and bandwidth requirements. Node operators participating in the Hoodi testnet must verify that their SSD I/O bandwidth and network peering arrangements can sustain two-hundred-million-gas block propagation within the strict four-second attestation deadline, ensuring that independent home stakers are not marginalized by rising resource requirements. Moreover, the successful protocolization of block building reduces regulatory exposure for external relay operators. By converting block construction auctions into a decentralized, protocol-native consensus mechanism, Ethereum eliminates centralized choke points that have historically attracted regulatory scrutiny surrounding transaction filtering. ## What to watch next Following the scheduled Hoodi activation on October 26, core developers will monitor validator attestation rates, state database expansion, and block propagation speeds over an intensive four-week observation window. Client engineering teams will release finalized production binaries for execution and consensus engines once testnet metrics demonstrate fault-tolerant stability under sustained high-load conditions. Finally, the All Core Developers call scheduled for late November will evaluate testnet performance data to propose a definitive mainnet target slot, signaling the final countdown for Ethereum's most consequential architectural upgrade of the year. ## Sources - [Ethereum Foundation AllCoreDevs](https://ethereum.org/en/developers/updates/2026/10/glamsterdam-hoodi-testnet-activation-schedule/): Core developer release documenting target epoch 132,352, 200 million gas limit specifications, and ePBS implementation. - [TradingView Crypto News](https://www.tradingview.com/news/tradingview:20261020-ethereum-glamsterdam-upgrade-hoodi-testnet/): Financial market coverage reviewing testnet execution timelines, client readiness, and layer-1 scaling impacts. - [Cointribune Market Analysis](https://www.cointribune.com/en/ethereum-sets-glamsterdam-upgrade-for-hoodi-testnet-on-october-26/): Decentralized finance analysis examining gas accounting revisions, block access lists, and validator economics. Mentions: Ethereum Foundation, Hoodi Testnet, Tim Beiko, ePBS ## Sources - [Ethereum Foundation AllCoreDevs](https://ethereum.org/en/developers/updates/2026/10/glamsterdam-hoodi-testnet-activation-schedule/) - [TradingView Crypto News](https://www.tradingview.com/news/tradingview:20261020-ethereum-glamsterdam-upgrade-hoodi-testnet/) - [Cointribune Market Analysis](https://www.cointribune.com/en/ethereum-sets-glamsterdam-upgrade-for-hoodi-testnet-on-october-26/)