Fix pg_size changing from 3 to 2

2022-01-03 17:56:54 +03:00
parent 5473d5b4a2
commit 08e467270a
2 changed files with 49 additions and 13 deletions
@@ -0,0 +1,27 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+const LPOptimizer = require('./lp-optimizer.js');
+
+const osd_tree = {
+    100: { 1: 1 },
+    200: { 2: 1 },
+    300: { 3: 1 },
+};
+
+async function run()
+{
+    let res;
+    console.log('16 PGs, size=3');
+    res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 16 });
+    LPOptimizer.print_change_stats(res, false);
+    console.log('\nChanging size to 2');
+    res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
+    LPOptimizer.print_change_stats(res, false);
+    if (res.space < 3*14/16)
+    {
+        throw new Error('Redistribution failed');
+    }
+}
+
+run().catch(console.error);