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Tart 2.0.0 blog post (#601)
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Fedor Korotkov
GitHub
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edigaryev:
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name: Nikolay Edigaryev
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description: Creator
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avatar: https://github.com/edigaryev.png
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fkorotkov:
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name: Fedor Korotkov
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description: Creator
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avatar: https://github.com/fkorotkov.png
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authors:
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edigaryev:
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name: Nikolay Edigaryev
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description: Creator
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avatar: https://github.com/edigaryev.png
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fkorotkov:
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name: Fedor Korotkov
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description: Creator
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avatar: https://github.com/fkorotkov.png
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---
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draft: false
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date: 2023-09-20
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search:
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exclude: true
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authors:
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- fkorotkov
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categories:
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- announcement
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---
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# Tart 2.0.0 and community updates
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Today we'd like to share some news and updates around the Tart ecosystem since the Tart 1.0.0 release back in February.
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<!-- more -->
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## Community Growth
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In the last 7 months Tart community almost tripled and growth is continuing to accelerate. Tart just crossed 25,000 installations,
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dozens of companies that we know of are using Tart in their daily workflows. If your company is not in the list please consider
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[joining](https://github.com/cirruslabs/tart/blob/main/Resources/Users/HowToAddYourself.md)!
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<div class="grid cards" markdown>
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- { height="65" }
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- { height="65" }
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- { height="65" }
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- { height="65" }
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- { height="65" }
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- { height="65" }
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</div>
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We are also very pleased by how the community responded to [the license change](2023-02-11-changing-tart-license.md).
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We now have a number of companies running Tart at scale under the new license. Revenue from the licensing allowed us to
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allocate time to continue improving Tart which brings us to the section below.
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## Recent updates and what's changing in Tart 2.0.0
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In the last 7 months we've had 12 feature releases that brought a lot of features requested by the community. Here are just
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a few of them to highlight:
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* [Custom GitLab Runner Executor](/integrations/gitlab-runner.md).
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* [Cluster Management via Orchard](2023-04-25-orchard-ga.md).
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* Numerous compatibility improvements for all kinds of OCI-registries.
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* Sonoma Support (see details [below](#macos-sonoma-updates)).
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But one of the most requested features/complaints was around pulling huge Tart images from remote OCI-compatible registries.
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With an ideal network conditions `tart pull` worked pretty good but in case of any network issues it was required to
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restart the pull from scratch. Additionally, some registries are notably slow streaming a single blob but can stream
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multiple blobs in parallel. Finally, the initial format of storing Tart VMs was very naive: disk image is compressed
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via a single stream which is chunked up into blobs that are serially uploaded to a registry. A single compression stream
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means that Tart can also only decompress blobs serially.
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Given these three observations above we came up with an improved format of storing Tart VM disk images. In Tart 2.0.0
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disk images are chunked up first and compressed independently into blobs, when pushed, each blob has attached annotations
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of expected uncompressed size and a checksum. This way when Tart 2.0.0 is pulling an image pushed by Tart 2.0.0 each blob can
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be pulled, uncompressed and written at the right offset independently. Having checksums along expected uncompressed blob size
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also allowed to support resumable pulls. Upon a failure Tart 2.0.0 will compare checksums of chunks and will continue pulling
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only missing blobs.
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Overall in our experiments we saw a 10% improvement in compressed size of the images and **4 times faster pulls**.
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In order to try the new image format please upgrade Tart and try to pull any of [the Sonoma images](https://github.com/orgs/cirruslabs/packages?tab=packages&q=macos-sonoma):
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```bash
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brew update cirruslabs/cli/tart
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tart pull ghcr.io/cirruslabs/macos-sonoma-base:latest
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```
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## macOS Sonoma Updates
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Tart VMs now can be run in a "suspendable" mode which will enable VM snapshotting instead of the standard shutdown.
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VMs with an existing snapshot will `run` from the same state as they got snapshotted. Please check demo down below:
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<div>
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<blockquote class="twitter-tweet" data-theme="dark">
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<p lang="en" dir="ltr">
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Tart 1.8.0 brings macOS Sonoma updates! 🍏 Now you can suspend and resume your virtual machines for even faster startup times. Check out the demo below 👇 <a href="https://t.co/RoRFT8Nwst">pic.twitter.com/RoRFT8Nwst</a>
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</p>— Cirrus Labs (@cirrus_labs) <a href="https://twitter.com/cirrus_labs/status/1677308360385765382?ref_src=twsrc%5Etfw">July 7, 2023</a>
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</blockquote>
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<script src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
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</div>
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There are two caveats to the "suspendable" mode support:
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1. Both host and guest should be running macOS Sonoma.
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2. Snapshots are locally encrypted and can't be shared between physical hosts. Therefore `tart push` won't push the corresponding snapshotted state of the VM.
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Try the "suspendable" mode for yourself by passing `--suspendable` flag to a `tart run` command:
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```bash
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tart clone ghcr.io/cirruslabs/macos-sonoma-base:latest sonoma-base
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tart run --suspendable sonoma-base
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```
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## Conclusion
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We are very excited about this major release of Tart. Please give it a try and let us know how it went!
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Stay tuned for new updates and announcements! There are a few coming up very shortly...
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nav:
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- "Home": index.md
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