+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "osd/OSDMap.h"
-#include "include/buffer.h"
-
-int main(int argc, char **argv)
-{
- /*
- * you need to create a suitable osdmap first. e.g., for 40 osds,
- * $ ./osdmaptool --createsimple 40 --clobber .ceph_osdmap
- */
- bufferlist bl;
- std::string error;
- if (bl.read_file(".ceph_osdmap", &error)) {
- cout << argv[0] << ": error reading .ceph_osdmap: " << error << std::endl;
- return 1;
- }
- OSDMap osdmap;
-
- try {
- osdmap.decode(bl);
- } catch (ceph::buffer::end_of_buffer &eob) {
- cout << "Exception (end_of_buffer) in decode(), exit." << std::endl;
- exit(1);
- }
-
- //osdmap.set_primary_affinity(0, 0x8000);
- //osdmap.set_primary_affinity(3, 0);
-
- int n = osdmap.get_max_osd();
- int count[n];
- int first_count[n];
- int primary_count[n];
- int size[4];
-
- memset(count, 0, sizeof(count));
- memset(first_count, 0, sizeof(first_count));
- memset(primary_count, 0, sizeof(primary_count));
- memset(size, 0, sizeof(size));
-
- for (int i=0; i<n; i++) {
- osdmap.set_state(i, osdmap.get_state(i) | CEPH_OSD_UP);
- //if (i<12)
- osdmap.set_weight(i, CEPH_OSD_IN);
- }
-
- //pg_pool_t *p = (pg_pool_t *)osdmap.get_pg_pool(0);
- //p->type = pg_pool_t::TYPE_ERASURE;
-
- for (int n = 0; n < 10; n++) { // namespaces
- char nspace[20];
- snprintf(nspace, sizeof(nspace), "n%d", n);
- for (int f = 0; f < 5000; f++) { // files
- for (int b = 0; b < 4; b++) { // blocks
- char foo[20];
- snprintf(foo, sizeof(foo), "%d.%d", f, b);
- object_t oid(foo);
- ceph_object_layout l = osdmap.make_object_layout(oid, 0, nspace);
- vector<int> osds;
- pg_t pgid = pg_t(l.ol_pgid);
- //pgid.u.ps = f * 4 + b;
- int primary;
- osdmap.pg_to_acting_osds(pgid, &osds, &primary);
- size[osds.size()]++;
-#if 0
- if (0) {
- hash<object_t> H;
- int x = H(oid);
- x = ceph_stable_mod(x, 1023, 1023);
- int s = crush_hash32(x) % 15;
- //cout << "ceph_psim: x = " << x << " s = " << s << std::endl;
- //osds[0] = s;
- }
-#endif
- //osds[0] = crush_hash32(f) % n;
- //cout << "oid " << oid << " pgid " << pgid << " on " << osds << std::endl;
- for (unsigned i=0; i<osds.size(); i++) {
- //cout << " rep " << i << " on " << osds[i] << std::endl;
- count[osds[i]]++;
- }
- if (osds.size())
- first_count[osds[0]]++;
- if (primary >= 0)
- primary_count[primary]++;
- }
- }
- }
-
- uint64_t avg = 0;
- for (int i=0; i<n; i++) {
- cout << "osd." << i << "\t" << count[i]
- << "\t" << first_count[i]
- << "\t" << primary_count[i]
- << std::endl;
- avg += count[i];
- }
- avg /= n;
- double dev = 0;
- for (int i=0; i<n; i++)
- dev += (avg - count[i]) * (avg - count[i]);
- dev /= n;
- dev = sqrt(dev);
-
- double pgavg = (double)osdmap.get_pg_pool(0)->get_pg_num() / (double)n;
- double edev = sqrt(pgavg) * (double)avg / pgavg;
- cout << " avg " << avg
- << " stddev " << dev
- << " (expected " << edev << ")"
- << " (indep object placement would be " << sqrt(avg) << ")" << std::endl;
-
- for (int i=0; i<4; i++) {
- cout << "size" << i << "\t" << size[i] << std::endl;
- }
-
- return 0;
-}