50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 (see README.md for details)
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const LPOptimizer = require('./lp-optimizer.js');
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async function run()
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{
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const osd_tree = {
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100: { 1: 1 },
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200: { 2: 1 },
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300: { 3: 1 },
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};
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let res;
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console.log('16 PGs, size=3');
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res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 16, ordered: false });
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LPOptimizer.print_change_stats(res, false);
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assert(res.space == 3, 'Initial distribution');
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console.log('\nChange size to 2');
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res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2, ordered: false });
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LPOptimizer.print_change_stats(res, false);
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assert(res.space >= 3*14/16 && res.osd_differs == 0, 'Redistribution');
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console.log('\nRemove OSD 3');
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const no3_tree = { ...osd_tree };
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delete no3_tree['300'];
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res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: no3_tree, pg_size: 2, ordered: false });
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LPOptimizer.print_change_stats(res, false);
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assert(res.space == 2, 'Redistribution after OSD removal');
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console.log('\n16 PGs, size=3, ordered');
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res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 16, ordered: true });
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LPOptimizer.print_change_stats(res, false);
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assert(res.space == 3, 'Initial distribution');
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console.log('\nChange size to 2, ordered');
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res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2, ordered: true });
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LPOptimizer.print_change_stats(res, false);
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assert(res.space >= 3*14/16 && res.osd_differs < 8, 'Redistribution');
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}
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function assert(cond, txt)
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{
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if (!cond)
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{
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throw new Error((txt||'test')+' failed');
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}
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}
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run().catch(console.error);
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