public virtual void Build(MetricDB db, ANNISetup setup)
{
// num_build_processors = 1;
this.DB = db;
var rows = new List<ANNI> ();
var pivsel = new PivotSelectorRandom(db.Count, RandomSets.GetRandom());
this.leader = new NANNI();
var ilc = new ANNI();
var cost = ilc.InternalBuild (setup, 0, 1.0, db, 2);
this.leader.Build (ilc);
int m = this.leader.clusters.Count;
double review_prob = cost.SingleCost - m; review_prob /= this.DB.Count;
var min_prob = Math.Sqrt (this.DB.Count) / this.DB.Count;
while (review_prob > min_prob) {
var row = new ANNI ();
rows.Add (row);
var _cost = row.InternalBuild (setup, m, review_prob, db, 2);
var _m = row.ACT.Count;
review_prob *= (_cost.SingleCost - _m) / this.DB.Count;
}
this.rows = rows.ToArray ();
}
public void Build(MetricDB db, ANNISetup setup, int num_indexes, int num_tasks = -1)
{
// num_build_processors = 1;
this.DB = db;
var _rows = new ANNI[num_indexes];
LongParallel.For (0, num_indexes, (int i) => {
_rows [i] = new ANNI ();
_rows [i].InternalBuild (setup, 0, 1.0, db, num_indexes);
}, num_tasks);
// ParallelOptions ops = new ParallelOptions ();
// ops.MaxDegreeOfParallelism = num_processors;
// Parallel.For (0, num_indexes, ops, (int i) => {
// _rows [i] = new ILC ();
// _rows [i].Build (db, num_indexes, pivsel);
// });
this.leader = new NANNI();
this.leader.Build(_rows [0]);
this.rows = new ANNI[num_indexes - 1];
for (int i = 1; i < num_indexes; ++i) {
this.rows[i - 1] = _rows[i];
}
}
public virtual void Build(MetricDB db, ANNISetup setup, int num_indexes, int num_tasks = -1)
{
// num_build_processors = 1;
this.DB = db;
--num_indexes;
this.rows = new ANNI[num_indexes];
var pivsel = new PivotSelectorRandom(db.Count, RandomSets.GetRandom());
this.leader = new NANNI();
var ilc = new ANNI();
var cost = ilc.InternalBuild (setup, 0, 1.0, db, 2);
this.leader.Build (ilc);
int m = this.leader.clusters.Count;
double review_prob = cost.SingleCost - m; review_prob /= this.DB.Count;
// ParallelOptions ops = new ParallelOptions ();
// ops.MaxDegreeOfParallelism = num_tasks;
// Parallel.For (0, num_indexes, ops, (int i) => {
// this.rows [i] = new ILC ();
// this.rows [i].InternalBuild (m, review_prob, db, num_indexes, pivsel);
// });
Console.WriteLine ("====> num_indexes: {0}", num_indexes);
LongParallel.For (0, num_indexes, (int i) => {
this.rows [i] = new ANNI ();
this.rows [i].InternalBuild (setup, m, review_prob, db, num_indexes);
}, num_tasks);
}
public static ANNI CreateANNI(string dbname, int expected_k)
{
MetricDB db = SpaceGenericIO.Load (dbname);
ANNI ilc = new ANNI ();
var annisetup = new ANNISetup (db.Count, expected_k);
ilc.Build (db, annisetup);
return ilc;
}
public void Build(ANNI ilc)
{
this.DB = ilc.DB;
int n = this.DB.Count;
this.clusters.Clear();
foreach (var objID in ilc.ACT) {
var node = new Node();
node.objID = objID;
this.clusters.Add (node);
}
for (int objID = 0; objID < n; ++objID) {
var c = ilc.CT [objID];
if (c == -1) continue;
this.clusters[c].Add (objID, ilc.DT [objID]);
}
}