--
-- 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,
+ timestamp real
+);
+
+-- List of segments which have been created.
+create table segments (
+ segmentid integer primary key,
+ segment text unique not null
+);
+
+-- Index of all blocks which have been stored in a snapshot, 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);
+
+-- Index tracking which blocks are used by which snapshots.
+create table snapshot_contents (
+ blockid integer,
+ snapshotid integer
+);
+create unique index snapshot_contents_unique
+ on snapshot_contents(blockid, snapshotid);