forked from vitalif/vitastor
Additionally balance parity chunks over OSDs using round-robin when generating initial distribution
parent
24409bd4c4
commit
66fe1a469b
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@ -50,7 +50,7 @@ async function lp_solve(text)
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return { score, vars };
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}
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async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1 })
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async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1, round_robin = false })
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{
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if (!pg_count || !osd_tree)
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{
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@ -92,7 +92,7 @@ async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize =
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console.log(lp);
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throw new Error('Problem is infeasible or unbounded - is it a bug?');
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}
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const int_pgs = make_int_pgs(lp_result.vars, pg_count);
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const int_pgs = make_int_pgs(lp_result.vars, pg_count, round_robin);
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const eff = pg_list_space_efficiency(int_pgs, all_weights, pg_minsize, parity_space);
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const res = {
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score: lp_result.score,
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@ -115,7 +115,7 @@ function shuffle(array)
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}
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}
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function make_int_pgs(weights, pg_count)
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function make_int_pgs(weights, pg_count, round_robin)
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{
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const total_weight = Object.values(weights).reduce((a, c) => Number(a) + Number(c), 0);
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let int_pgs = [];
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@ -123,10 +123,15 @@ function make_int_pgs(weights, pg_count)
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let weight_left = total_weight;
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for (const pg_name in weights)
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{
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let cur_pg = pg_name.substr(3).split('_');
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let n = Math.round(weights[pg_name] / weight_left * pg_left);
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for (let i = 0; i < n; i++)
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{
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int_pgs.push(pg_name.substr(3).split('_'));
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int_pgs.push([ ...cur_pg ]);
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if (round_robin)
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{
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cur_pg.push(cur_pg.shift());
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}
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}
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weight_left -= weights[pg_name];
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pg_left -= n;
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@ -1022,6 +1022,7 @@ class Mon
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pg_size: pool_cfg.pg_size,
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pg_minsize: pool_cfg.pg_minsize,
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max_combinations: pool_cfg.max_osd_combinations,
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round_robin: pool_cfg.scheme != 'replicated',
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};
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let optimize_result;
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if (old_pg_count > 0)
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