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Use murmur3 to select primary OSD instead of old pseudo-rng

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This commit is contained in:
Vitaliy Filippov
2025-01-18 12:28:54 +03:00
parent 7c9711af20
commit 7cbf207d65
1 changed files with 5 additions and 21 deletions
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mon/pg_gen.js
+5 -21
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@@ -8,23 +8,9 @@ const LPOptimizer = require('./lp_optimizer/lp_optimizer.js');
const { scale_pg_count } = require('./pg_utils.js');
const { make_hier_tree, filter_osds_by_root_node,
filter_osds_by_tags, filter_osds_by_block_layout, get_affinity_osds } = require('./osd_tree.js');
const { select_murmur3 } = require('./lp_optimizer/murmur3.js');
let seed;
function reset_rng()
{
seed = 0x5f020e43;
}
function rng()
{
seed ^= seed << 13;
seed ^= seed >> 17;
seed ^= seed << 5;
return seed + 2147483648;
}
function pick_primary(pool_config, osd_set, up_osds, aff_osds)
function pick_primary(pool_id, pg_num, pool_config, osd_set, up_osds, aff_osds)
{
let alive_set;
if (pool_config.scheme === 'replicated')
@@ -52,7 +38,7 @@ function pick_primary(pool_config, osd_set, up_osds, aff_osds)
{
return 0;
}
return alive_set[rng() % alive_set.length];
return alive_set[select_murmur3(alive_set.length, osd_num => pool_id+'/'+pg_num+'/'+osd_num)];
}
function recheck_primary(state, global_config, up_osds, osd_tree)
@@ -66,7 +52,6 @@ function recheck_primary(state, global_config, up_osds, osd_tree)
continue;
}
const aff_osds = get_affinity_osds(pool_cfg, up_osds, osd_tree);
reset_rng();
for (let pg_num = 1; pg_num <= pool_cfg.pg_count; pg_num++)
{
if (!state.pg.config.items[pool_id])
@@ -76,7 +61,7 @@ function recheck_primary(state, global_config, up_osds, osd_tree)
const pg_cfg = state.pg.config.items[pool_id][pg_num];
if (pg_cfg)
{
const new_primary = pick_primary(state.config.pools[pool_id], pg_cfg.osd_set, up_osds, aff_osds);
const new_primary = pick_primary(pool_id, pg_num, state.config.pools[pool_id], pg_cfg.osd_set, up_osds, aff_osds);
if (pg_cfg.primary != new_primary)
{
if (!new_pg_config)
@@ -99,13 +84,12 @@ function save_new_pgs_txn(save_to, request, state, etcd_prefix, etcd_watch_revis
{
const aff_osds = get_affinity_osds(state.config.pools[pool_id] || {}, up_osds, osd_tree);
const pg_items = {};
reset_rng();
new_pgs.map((osd_set, i) =>
{
osd_set = osd_set.map(osd_num => osd_num === LPOptimizer.NO_OSD ? 0 : osd_num);
pg_items[i+1] = {
osd_set,
primary: pick_primary(state.config.pools[pool_id], osd_set, up_osds, aff_osds),
primary: pick_primary(pool_id, i+1, state.config.pools[pool_id], osd_set, up_osds, aff_osds),
};
if (prev_pgs[i] && prev_pgs[i].join(' ') != osd_set.join(' ') &&
prev_pgs[i].filter(osd_num => osd_num).length > 0)