Is data distributed across each server equally or unequally or determined by the user

[powell]

Dear Team,

Please I want to know if data stored on Tahoe is evenly (equally) distributed to each remote server or you can have uneven (unequal) fragments of your data stored across each remote server. And can you determine the fragments you store across these servers or there is an algorithm that automatically does that and you have no control over the fragments stored on each server.

Another question is that the defaults of N (10) fragments, and H (7) servers and K (3) available servers in case of failure-Are these default values the minimum you must have? if not what is the minimum? I guess the minimum to recover your data is K (3) servers.

Kind regards Powell

[davidsarah]

For future reference, this kind of question should preferably be asked on tahoe-dev rather than as a ticket, but I'll answer anyway:

• shares are normally evenly distributed over all servers that are accepting new shares. #872 and #467 would allow more flexibility. #467 is probably closer to what you are asking for; please feel free to talk about your requirements on that ticket.

• the default encoding parameters are not minimums; you can even set K = H = N = 1. To recover your data for a particular file, K shares must be available for that file. (This doesn't in general require K servers, although it will if each server has one share.)