The main developers of the Ethereum blockchain have chosen the beginning of December to pre-launch the next major hard fork of the network called Fusaka.
The purpose of the update is to scale the network and make it more efficient.
The Fusaka update will be launched on December 3, and the increase in BLOB capacity will occur in two weeks, that is, approximately on December 17th. Then, on January 7, 2026, there will be another change in the capacity of blobs.
BLOB (from English Binary Large Object — "large binary object") is a data type designed to store large amounts of binary data.
As a result of the hard fork on the Ethereum network, the current capacity of BLOB objects will more than double.
Before the update is launched on the main Ethereum network, three public test networks will be conducted from early October to mid-November.
The initial conclusion is that we can use the maximum number of blobs equal to 15 for BPO1 [for BLOB parameters only] and the maximum number of BLOBS equal to 21 for BPO2. A total of 5 BPO's are planned for Fusaka, so we can ensure secure scaling of the main network," said the Ethereum developer community ethPandaOps.
The Fusaka hard fork will launch a few months after the Pectra update, which took place on May 7. It raised the validator rate limit, introduced account abstraction, and made second-tier networks more efficient.