ExternalVendorCode/tahoe-lafs
1
0
Fork 0
mirror of https://github.com/tahoe-lafs/tahoe-lafs.git synced 2025-02-07 11:50:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

docs/about.rst: correct the description of availability to take into account that shares may not be stored on distinct servers.

Browse Source
This commit is contained in:
david-sarah 2011-10-25 06:25:50 -07:00
parent 633641174a
commit f8be1f6220
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
docs/about.rst
View File

@ -50,10 +50,11 @@ integrity-checked by the gateway, so that the servers can neither read nor
modify the contents of the files. modify the contents of the files.
Users do rely on storage servers for *availability*. The ciphertext is Users do rely on storage servers for *availability*. The ciphertext is
erasure-coded and distributed across ``N`` storage servers (the default value erasure-coded into ``N`` shares distributed across at least ``H`` distinct
for ``N`` is 10) so that it can be recovered from any ``K`` of these servers storage servers (the default value for ``N`` is 10 and for ``H`` is 7) so
(the default value of ``K`` is 3). Therefore only the simultaneous failure that it can be recovered from any ``K`` of these servers (the default
of ``N-K+1`` (with the defaults, 8) servers can make the data unavailable. value of ``K`` is 3). Therefore only the failure of ``H-K+1`` (with the
defaults, 5) servers can make the data unavailable.
In the typical deployment mode each user runs her own gateway on her own In the typical deployment mode each user runs her own gateway on her own
machine. This way she relies on her own machine for the confidentiality and machine. This way she relies on her own machine for the confidentiality and