Gemini Switched to Zakura for Zcash Infrastructure
The migration to the new software speeds up node synchronization as the network prepares for faster block times.
Updated on Sept. 30, 2026 in Cybersecurity
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Gemini has shifted its Zcash node infrastructure from Zebra to the new Zakura software. This architectural change is designed to handle the increased load of the proposed NU7 network upgrade.
Why it matters
The upgrade prepares the Zcash network for a transition from 75-second to 25-second block spacing, requiring more efficient node processing capabilities to maintain chain integrity.
Zakura reached the Zcash chain tip in approximately 6 hours, significantly outperforming the 24 hours required by Zebra. The software also utilizes 12-gigabyte pruned snapshots to improve node recovery.
The players
Gemini
A centralized cryptocurrency exchange that provides custodial and trading services for various blockchain assets.
Zcash
A privacy-focused decentralized blockchain network that utilizes zero-knowledge proofs for transactional anonymity.
The details
Zakura improves performance by utilizing pruned snapshots—a method of retaining only the most recent or relevant blockchain data to allow for faster node bootstrapping. This infrastructure shift readies the network for the NU7 upgrade, which will reduce target block spacing from 75 seconds to 25 seconds. By compressing the sync time, the software ensures that nodes can keep pace with a higher frequency of block validation.
Timeline
October 6, 2026: NU7 testnet activation.
October 20, 2026: Final mainnet activation decision.
November 5, 2026: Target date for mainnet activation.
The Tech Race
This migration positions node infrastructure for the upcoming NU7 upgrade on the Zcash network. It follows a industry-wide push to reduce block latency and improve synchronization speeds across decentralized ledgers.
This update primarily affects Zcash node operators and exchange infrastructure by drastically reducing the time required to sync with the blockchain. Users interacting with Gemini's Zcash services can expect improved system responsiveness once the NU7-related performance gains are realized.
The takeaway
The move to Zakura highlights how infrastructure must evolve to match the throughput demands of faster blockchain consensus rules. Observers should track the November 5, 2026, target date to see if the mainnet activation successfully sustains the proposed 25-second block spacing.
What happens next
The network will proceed with NU7 testnet activation on October 6, 2026, followed by a final decision regarding mainnet deployment on October 20, 2026.
Further reading
For broader trends in blockchain node security and efficiency, see our Cybersecurity section.
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Do you trust that your cryptocurrency exchange is adequately upgrading its infrastructure to prevent service delays?
