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Extract PG combinator into a separate module

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This commit is contained in:
Vitaliy Filippov
2024-04-07 00:36:20 +03:00
parent 9fe779a691
commit 6a924d6066
8 changed files with 357 additions and 306 deletions
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mon/test-nonuniform.js
+7 -5
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@@ -7,6 +7,7 @@
// This leads to really uneven OSD fill ratio in Ceph even when PGs are perfectly balanced.
// But we support this case with the "parity_space" parameter in optimize_initial()/optimize_change().
const { SimpleCombinator } = require('./simple_pgs.js');
const LPOptimizer = require('./lp-optimizer.js');
const osd_tree = {
@@ -114,16 +115,17 @@ Fine, let's try to optimize for it.
async function run()
{
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
const eff = LPOptimizer.pg_list_space_efficiency(prev_pgs, all_weights, 2, 2.26);
const osd_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(osd_weights).reduce((a, c) => Number(a) + Number(c), 0);
const eff = LPOptimizer.pg_list_space_efficiency(prev_pgs, osd_weights, 2, 2.26);
const orig = eff*4.26 / total_weight;
console.log('Original efficiency was: '+Math.round(orig*10000)/100+' %');
let prev = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 256, parity_space: 2.26 });
const combinator = new SimpleCombinator(osd_tree, 3, 10000);
let prev = await LPOptimizer.optimize_initial({ osd_weights, combinator, pg_size: 3, pg_count: 256, parity_space: 2.26 });
LPOptimizer.print_change_stats(prev);
let next = await LPOptimizer.optimize_change({ prev_pgs, osd_tree, pg_size: 3, max_combinations: 10000, parity_space: 2.26 });
let next = await LPOptimizer.optimize_change({ prev_pgs, osd_weights, combinator, pg_size: 3, parity_space: 2.26 });
LPOptimizer.print_change_stats(next);
}