V21.2¶

V21.2 Release Available

The latest release is V21.2 which adds optimizations for the OpenCL work kernel and resolves issues interrupting node operation during certain network conditions. Upgrading to V21.2 is recommended for all node operators.

There are no special integration considerations or impacts with this release if upgrading from V21.0 or higher. If upgrading from V20.0 or lower, please review the V21.0 Release Notes for upgrade notices and other considerations.

Node	Protocol	Database	Release Date	Release Notes	GitHub Links
21.2	18	18	2020-09-03	V21.2	Release - Milestone - Changelog

Known Issue V19+: macOS 'Too many open files'

Issue: The following error can be seen when attempting to run a full node on macOS using the built-in Qt wallet or other GUI-based wallets: "Exception while running wallet: open: Too many open files". This is due to macOS having a very low default file descriptor limit and V19.0 uses more of them after the move to TCP.
Solution: For now a workaround is needed to increase the limit. The method depends on the specific macOS version, but some people had success with the recipe in https://superuser.com/a/1171028.

Builds and Commands¶

OS	Download link/command	Verification
Universal Linux	https://repo.nano.org/live/binaries/nano-node-V21.2-Linux.tar.bz2	SHA256 Checksum
Debian	http://repo.nano.org/live/binaries/nano-node-V21.2-Linux.deb	SHA256 Checksum
macOS	https://repo.nano.org/live/binaries/nano-node-V21.2-Darwin.dmg	SHA256 Checksum
Windows (exe)	https://repo.nano.org/live/binaries/nano-node-V21.2-win64.exe	SHA256 Checksum
Windows (zip)	https://repo.nano.org/live/binaries/nano-node-V21.2-win64.zip	SHA256 Checksum
Docker	`docker pull nanocurrency/nano:V21.2` or `docker pull nanocurrency/nano:latest` See Pulling the Docker Image for more details.
RHEL/CentOS rpm	`sudo rpm -iUvh https://repo.nano.org/live/binaries/nanocurrency-21.2-21.el7.x86_64.rpm` This installs `nano_node` and `nano_rpc` to `/usr/bin`.	SHA256 Checksum

Useful guide updates¶

We've been making many useful updates to the documentation here, especially around various guides for managing different aspects of the Nano node. Here are a few worth digging into:

Nano Forum available

The Nano Forum is available at https://forum.nano.org/ as a resource to ask questions and get support when participating on the network. The Node and Representative Management category is a great place to ask node upgrade related questions.

Join our Technical Update Mailing List

Follow this link to sign up for email updates on the latest protocol/node releases and other technical details. This will include network upgrades such as the upcoming epoch distribution: http://eepurl.com/gZucL1