Transcript
![Page 1: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/1.jpg)
Erasure Code in Ceph
![Page 2: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/2.jpg)
Save Space
![Page 3: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/3.jpg)
XOR
![Page 4: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/4.jpg)
3 peta => 1.3 peta
![Page 5: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/5.jpg)
Harder object mutations / recovery
![Page 6: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/6.jpg)
Simple operations and tiering
Replicated Erasure Coded
![Page 7: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/7.jpg)
Promoted to replica on read
Replicated Erasure Coded
![Page 8: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/8.jpg)
Sam & David : refactor
![Page 9: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/9.jpg)
Andreas & Loic : erasure code
![Page 10: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/10.jpg)
Target : February 2014
![Page 11: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/11.jpg)
Why save space before shortage ?
![Page 12: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/12.jpg)
Alpha testers
![Page 13: London Ceph Day: Erasure Coding: Purpose and Progress](https://reader034.vdocuments.site/reader034/viewer/2022051412/54b823454a79591e448b45bf/html5/thumbnails/13.jpg)
Sponsors and developers