forked from vitalif/vitastor
26 lines
858 B
JavaScript
26 lines
858 B
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 = { a: { 1: 1 }, b: { 2: 1 }, c: { 3: 1 } };
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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 });
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LPOptimizer.print_change_stats(res, false);
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console.log('\nReduce PG size to 2');
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res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs.map(pg => pg.slice(0, 2)), osd_tree, pg_size: 2 });
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LPOptimizer.print_change_stats(res, false);
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console.log('\nRemove OSD 3');
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delete osd_tree['c'];
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res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
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LPOptimizer.print_change_stats(res, false);
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}
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run().catch(console.error);
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