Combine erasure coding with data deduplication to simultaneously reduce the overall redundancy in data while increasing the redundancy of unique data. Deduplication also requires less network transfer.
Any compression would need to be before encryption, as compressing encrypted data will have little benefit. Right now this is handled by zipping/tar-ing before uploading.
Combine erasure coding with data deduplication to simultaneously reduce the overall redundancy in data while increasing the redundancy of unique data. Deduplication also requires less network transfer.
http://shiftleft.com/mirrors/www.hpl.hp.com/personal/Mark_Lillibridge/Reliability/website_draft.pdf https://en.wikipedia.org/wiki/Data_deduplication