cernceph

#!/usr/bin/env python

import random
from math import sqrt, log, pow

DEBUG = True
NPGS = 100000 # num PGs
R = 3  # num replicas

if NPGS > 3:

cernceph

Num PGs: 100000
Num Replicas: 3
OSDs (id: weight): {0: 3.0, 1: 3.0, 2: 3.0, 3: 1.0}

Expected:   {0: 90000.0, 1: 90000.0, 2: 90000.0, 3: 30000.0}
  Replica 0: [30000.0, 30000.0, 30000.0, 10000.0]
  Replica 1: [30000.0, 30000.0, 30000.0, 10000.0]
  Replica 2: [30000.0, 30000.0, 30000.0, 10000.0]

Simulating with existing CRUSH

cernceph

#!/usr/bin/env python

import random
from math import sqrt, log, pow

DEBUG = True
NPGS = 100000 # num PGs
R = 3  # num replicas

if NPGS > 3:

cernceph

Num PGs: 100000
Num Replicas: 3
OSDs (id: weight): {0: 2.0, 1: 3.0, 2: 4.0, 3: 1.0}

Expected:   {0: 60000.0, 1: 90000.0, 2: 120000.0, 3: 30000.0}
  Replica 0: [20000.0, 30000.0, 40000.0, 10000.0]
  Replica 1: [20000.0, 30000.0, 40000.0, 10000.0]
  Replica 2: [20000.0, 30000.0, 40000.0, 10000.0]

Simulating with existing CRUSH

cernceph

#!/usr/bin/env python

import random
from math import sqrt, log, pow

DEBUG = True
NPGS = 100000 # num PGs
R = 3  # num replicas

if NPGS > 3:

cernceph

#!/usr/bin/env python

import random
from math import sqrt, log, pow

DEBUG = True
NPGS = 100000 # num PGs
R = 3  # num replicas

if NPGS > 3:

cernceph

frontend cs3.cern.ch-frontend-ssl
  bind ipv4@:443,ipv6@:443 ssl no-sslv3 crt /etc/haproxy/cert.pem verify none
  acl ha_stats url_beg /stats
  acl pathstyle_buckets hdr(host) -i cs3.cern.ch
  capture request header User-Agent len 256
  capture request header Host len 128
  http-request set-var(req.bucketname) path,word(1,/) if pathstyle_buckets
  http-request set-var(req.bucketname) hdr(host),regsub(.cs3.cern.ch,) if ! pathstyle_buckets
  http-request set-header X-Debug-Bucket %[var(req.bucketname)]
  timeout http-request 5m