Changes between Version 55 and Version 56 of FAQ
 Timestamp:
 20111125T17:39:32Z (11 years ago)
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FAQ
v55 v56 16 16 This uses an amount of space on each server equal to the total size of your data divided by {{{K}}}. 17 17 18 T ahoeLAFS is typically used with {{{3of10}}} parameters, so the data is spread over 10 different drives, and you can lose any 7 of them and still recover the entire data. This gives much better reliability than comparable RAID setups, at a cost of only 3.3 times the storage space that a single copy takes. It takes about 3.3 times the storage space, because it uses space on each server needs equal to 1/3 of the size of the data and there are 10 servers.18 The default TahoeLAFS parameters are {{{3of10}}}, so the data is spread over 10 different drives, and you can lose any 7 of them and still recover the entire data. This gives much better reliability than comparable RAID setups, at a cost of only 3.3 times the storage space that a single copy takes. It takes about 3.3 times the storage space, because it uses space on each server needs equal to 1/3 of the size of the data and there are 10 servers. 19 19 20 20 Erasure coding is also known as "forward error correction" and as an "information dispersal algorithm".