create table snapshots (
snapshotid integer primary key,
name text not null,
+ scheme text,
timestamp real
);
-- List of segments which have been created.
create table segments (
segmentid integer primary key,
- segment text unique not null
+ segment text unique not null,
+ path text,
+ checksum text,
+ size integer
);
--- Index of all blocks which have been stored in a snapshot, by checksum.
+-- Index of all blocks which have been stored, by checksum.
create table block_index (
blockid integer primary key,
segmentid integer not null,
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
+-- Summary of segment utilization for each snapshots.
+create table segments_used (
+ snapshotid integer not null,
+ segmentid integer not null,
+ utilization real
);
-create unique index snapshot_contents_unique
- on snapshot_contents(blockid, snapshotid);