X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=schema.sql;h=3cf175b3d12dfb28f3e7cc75e5c92113ae1039ad;hb=cc2d3611ed50f5965a9138ffaf3262417993c4f8;hp=114670c76da37d0ffc04ebdb7026e50340d2fdf4;hpb=ed5a047c1b8a8f5c43b0192e8e774b91497c9706;p=cumulus.git

diff --git a/schema.sql b/schema.sql
index 114670c..3cf175b 100644
--- a/schema.sql
+++ b/schema.sql
@@ -3,12 +3,50 @@
 --
 -- The index is stored in an SQLite3 database.  This is its schema.
 
--- Index of all blocks which have been stored in one snapshot, by checksum.
+-- List of snapshots which have been created.
+create table snapshots (
+    snapshotid integer primary key,
+    name text not null,
+    scheme text,
+    timestamp real,
+    intent real
+);
+
+-- List of segments which have been created.
+create table segments (
+    segmentid integer primary key,
+    segment text unique not null,
+    path text,
+    checksum text,
+    mtime real,
+    size integer
+);
+
+-- Index of all blocks which have been stored, by checksum.
 create table block_index (
     blockid integer primary key,
-    segment text,
-    object text,
+    segmentid integer not null,
+    object text not null,
     checksum text,
-    size integer
+    size integer,
+    timestamp real,
+    expired integer
 );
 create index block_content_index on block_index(checksum);
+create unique index block_name_index on block_index(segmentid, object);
+
+-- Summary of segment utilization for each snapshots.
+create table segments_used (
+    snapshotid integer not null,
+    segmentid integer not null,
+    utilization real
+);
+
+-- Overall estimate of segment utilization, for all snapshots combined.
+create view segment_info as
+select segmentid, mtime, size, cast(size * utilization as integer) as used,
+       utilization
+from segments join
+     (select segmentid, max(utilization) as utilization
+      from segments_used group by segmentid)
+using (segmentid);