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Support CRUSH-like multi-level placement trees

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This commit is contained in:
Vitaliy Filippov
2020-05-09 00:55:24 +03:00
parent aaa054e644
commit c26b6e1fc3
2 changed files with 76 additions and 6 deletions
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lp/test-optimize.js
+41 -6
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@@ -40,20 +40,55 @@ const osd_tree = {
},*/
};
const crush_tree = [
{ level: 1, children: [
{ level: 2, children: [
{ level: 3, id: 1, size: 3 },
{ level: 3, id: 2, size: 2 },
] },
{ level: 2, children: [
{ level: 3, id: 3, size: 4 },
{ level: 3, id: 4, size: 4 },
] },
] },
{ level: 1, children: [
{ level: 2, children: [
{ level: 3, id: 5, size: 4 },
{ level: 3, id: 6, size: 1 },
] },
{ level: 2, children: [
{ level: 3, id: 7, size: 3 },
{ level: 3, id: 8, size: 5 },
] },
] },
{ level: 1, children: [
{ level: 2, children: [
{ level: 3, id: 9, size: 5 },
{ level: 3, id: 10, size: 2 },
] },
{ level: 2, children: [
{ level: 3, id: 11, size: 3 },
{ level: 3, id: 12, size: 3 },
] },
] },
];
async function run()
{
// Test: add 1 OSD of almost the same size. Ideal data movement could be 1/12 = 8.33%. Actual is ~13%
// Space efficiency is ~99.5% in both cases.
let prev = await LPOptimizer.optimize_initial(osd_tree, 256);
LPOptimizer.print_change_stats(prev, false);
let res = await LPOptimizer.optimize_initial(osd_tree, 256);
LPOptimizer.print_change_stats(res, false);
console.log('adding osd.8');
osd_tree[500][8] = 3.58589;
let next = await LPOptimizer.optimize_change(prev.int_pgs, osd_tree);
LPOptimizer.print_change_stats(next, false);
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
console.log('removing osd.8');
delete osd_tree[500][8];
next = await LPOptimizer.optimize_change(next.int_pgs, osd_tree);
LPOptimizer.print_change_stats(next, false);
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
res = await LPOptimizer.optimize_initial(LPOptimizer.flatten_tree(crush_tree, 1, 3), 256);
LPOptimizer.print_change_stats(res, false);
}
run().catch(console.error);