From c7d28f2e117a9cae2ab632889cdf019a2705c80f Mon Sep 17 00:00:00 2001 From: davidsarah <> Date: Fri, 25 Nov 2011 17:39:32 +0000 Subject: [PATCH] Q2: typically-used parameters -> default parameters [Imported from Trac: page FAQ, version 56] --- FAQ.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/FAQ.md b/FAQ.md index 1582f4b..5e6a5f3 100644 --- a/FAQ.md +++ b/FAQ.md @@ -15,7 +15,7 @@ A: You know how with RAID-5 you can lose any one drive and still recover? And t This uses an amount of space on each server equal to the total size of your data divided by `K`. -Tahoe-LAFS is typically used with `3-of-10` 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. +The default Tahoe-LAFS parameters are `3-of-10`, 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. Erasure coding is also known as "forward error correction" and as an "information dispersal algorithm".