public async Task Rebuild_Large_Files()
{
// do some tests
async Task DoTestAsync(ILiteDatabaseAsync db, ILiteCollectionAsync <Zip> col)
{
Assert.Equal(1, await col.CountAsync());
Assert.Equal(99, db.UserVersion);
};
using (var file = new TempFile())
{
using (var db = new LiteDatabaseAsync(file.Filename))
{
var col = db.GetCollection <Zip>();
db.UserVersion = 99;
await col.EnsureIndexAsync("city", false);
var inserted = await col.InsertAsync(DataGen.Zip()); // 29.353 docs
var deleted = await col.DeleteManyAsync(x => x.Id != "01001"); // delete 29.352 docs
Assert.Equal(29353, inserted);
Assert.Equal(29352, deleted);
Assert.Equal(1, await col.CountAsync());
// must checkpoint
await db.CheckpointAsync();
// file still large than 5mb (even with only 1 document)
Assert.True(file.Size > 5 * 1024 * 1024);
// reduce datafile
var reduced = await db.RebuildAsync();
// now file are small than 50kb
Assert.True(file.Size < 50 * 1024);
await DoTestAsync(db, col);
}
// re-open and rebuild again
using (var db = new LiteDatabaseAsync(file.Filename))
{
var col = db.GetCollection <Zip>();
await DoTestAsync(db, col);
await db.RebuildAsync();
await DoTestAsync(db, col);
}
}
}
public async Task Rebuild_After_DropCollection()
{
using (var file = new TempFile())
using (var db = new LiteDatabaseAsync(file.Filename))
{
var col = db.GetCollection <Zip>("zip");
await col.InsertAsync(DataGen.Zip());
await db.DropCollectionAsync("zip");
await db.CheckpointAsync();
// full disk usage
var size = file.Size;
var r = await db.RebuildAsync();
// only header page
Assert.Equal(8192, size - r);
}
}
