From 81ccaa36529f6d9171176b9f6b574d481af317ff Mon Sep 17 00:00:00 2001 From: daira <> Date: Sat, 27 Jul 2013 02:10:23 +0000 Subject: [PATCH] IDAs have different security properties to erasure coding [Imported from Trac: page FAQ, version 96] --- FAQ.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/FAQ.md b/FAQ.md index 3832f36..7cff00f 100644 --- a/FAQ.md +++ b/FAQ.md @@ -1,6 +1,6 @@ **Q0: What is Tahoe-LAFS? What can you do with it?** -A: Think of Tahoe-LAFS as being like [BitTorrent](https://en.wikipedia.org/wiki/BitTorrent), except you can upload as well as download. Also, Tahoe-LAFS has directories and files so that if you're looking at a directory that is stored in Tahoe-LAFS, you can navigate to a file or sub-directory that is also in Tahoe-LAFS. So in that sense it is a little more like a filesystem than BitTorrent is. Tahoe-LAFS comes with filesystem integration for Unix (FUSE) and for Windows—see [#Q23_FUSE Q23], below. +A: Think of Tahoe-LAFS as being like [BitTorrent](https://en.wikipedia.org/wiki/BitTorrent), except you can upload as well as download. Also, Tahoe-LAFS has directories and files so that if you're looking at a directory that is stored in Tahoe-LAFS, you can navigate to a file or sub-directory that is also in Tahoe-LAFS. So in that sense it is a little more like a filesystem than BitTorrent is. Tahoe-LAFS also allows filesystem integration for Unix via sshfs. **Q1: What is special about Tahoe-LAFS? Why should anyone care about it instead of [other distributed storage systems](RelatedProjects#OtherProjects)?** @@ -18,9 +18,9 @@ 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`. -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. +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 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". +Erasure coding is also known as "forward error correction". **Q3: Is there a way to disable the encryption for content which isn't secret? Won't that save a lot of CPU cycles?**