Rename to ctls.

1 files changed, 29 insertions, 20 deletions

diff --git a/doc/design.txt b/doc/design.txt
index ba28fdc..a83ec85 100644
--- a/doc/design.txt
+++ b/doc/design.txt
@@ -1,36 +1,45 @@
-catlfish design (in Emacs -*- org -*- mode)
+ctls design (in Emacs -*- org -*- mode)
 
-This document describes the design of catlfish, an implementation of a
-Certificate Transparency (RFC6962) log.
+This document describes the design of ctls, an implementation of a
+Certificate Transparency (RFC6962) log server.
 
 We have
-- persistent storage of x509 certificate chains
-- a db storing the hash tree  and replicating r/o copies to n
-  secondary nodes
-- 1 primary node updating the hash tree in the r/w db
-- n secondary nodes reading from local r/o db
+- "a db" storing 
+  i) x509 certificate chains and 
+  ii) the hash tree,
+  replicating r/o copies to n secondary nodes
+-? 1 primary node updating the db
+-? n secondary nodes reading from local r/o db
 
 Nodes reply to the https requests specified in RFC 6962.
-Nodes can operate in one of two modes -- primary or secondary.
+?Nodes can operate in one of two modes -- primary or secondary.
 [TODO: A secondary node can become primary. When, how?]
 
-Primary nodes
+Node roles
+- depot
+- tree-maker
+- tree-signer
+- submission-point
+- query-replyer
+
+?Primary nodes
 - store submitted cert chains in persistent media
-- have write access to the database holding the hash tree
-- periodically add the stored cert chains to the hash tree and sign the tree
-  periodically (like ever 10 minutes and at least every hour?)
+- have write access to the database holding cert chains and the hash tree
+- periodically add cert chains to the hash tree and sign the tree head
+  (like ever 10 minutes and at least every hour?)
+
+?Secondary nodes
+- have read access to the database [which is pushed or pulled?]
 
-Secondary nodes
-- have read access to the ctlog database [which is pushed or pulled?]
+The log data db
+- is persistently stored on [more than one] disk [files, DETS, mnesia,
+  some other database?]
+- grows with 5 GB per year, based on 5,000 3 kB submissions per day
+- max size is 300 GB, based on 100e6 certificates
 
 The hash tree db
 -? is persistantly stored on disk
 -? is implemented as a 'protected, ram_file' DETS table
-- [size]
-
-The log data
-- is persistently stored in a file system on disk
-- grows with 5 GB per year, based on 5,000 3 kB submissions per day
 
 Scaling, performance, estimates
 - submissions: less than 0.1 qps, based on 5,000 submissions per day