ZFS overhead calc.xlsx
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

Comment only
 
 
ABCDEFGHIJKLMNOPQRSTUVWXYZAAAB
1
total disksdata disksraidz levelrecordsize (KiB)recordsize (bytes)ashiftsector size (bytes)sectorstheoretical sectors per diskfull stripespartial stripe sectorstotal theoretical sectorstotal actual sectorsallocation paddingallocation overhead % (before ZFS copy-on-write reservation, AKA slop_shift)
2
128KiB records
Hover here for a walkthrough of the calculation
3
42212813107212409632161606464663.125
4
5321281310721240963210.6666666710253.3333333354541.25
5
642128131072124096328804848480
6
752128131072124096326.46244.846487.142857143
7
862128131072124096325.3333333335242.6666666744455.46875
8
972128131072124096324.5714285714441.1428571442422.083333333
9
1082128131072124096324404040425
10
1192128131072124096323.5555555563539.1111111140427.386363636
11
12102128131072124096323.23238.440429.375
12
13112128131072124096322.90909090921037.8181818238393.125
13
14122128131072124096322.6666666672837.3333333338394.464285714
14
15132128131072124096322.4615384622636.9230769238395.625
15
16142128131072124096322.2857142862436.5714285738396.640625
16
17152128131072124096322.1333333332236.2666666738397.536764706
17
18162128131072124096322203636360
18
19172128131072124096321.88235294111535.7647058836360.6578947368
19
20182128131072124096321.77777777811435.5555555636361.25
20
21192128131072124096321.68421052611335.3684210536361.785714286
21
22202128131072124096321.611235.236362.272727273
22
23212128131072124096321.52380952411135.0476190536362.717391304
23
24222128131072124096321.45454545511034.9090909136363.125
24
25
1MiB records
26
4221024104857612409625612812805125125130.1953125
27
5321024104857612409625685.33333333851426.66666674284290.546875
28
64210241048576124096256646403843843840
29
7521024104857612409625651.2511358.43603600.4464285714
30
8621024104857612409625642.66666667424341.33333333423420.1953125
31
9721024104857612409625636.57142857364329.14285713303300.2604166667
32
108210241048576124096256323203203203210.3125
33
11921024104857612409625628.44444444284312.88888893143150.6747159091
34
121021024104857612409625625.6256307.23083090.5859375
35
131121024104857612409625623.27272727233302.54545453043061.141826923
36
141221024104857612409625621.33333333214298.66666673003000.4464285714
37
151321024104857612409625619.69230769199295.38461542962970.546875
38
161421024104857612409625618.28571429184292.57142862942940.48828125
39
171521024104857612409625617.06666667171290.13333332922941.332720588
40
1816210241048576124096256161602882882880
41
191721024104857612409625615.05882353151286.11764712882880.6578947368
42
201821024104857612409625614.22222222144284.44444442862881.25
43
211921024104857612409625613.47368421139282.94736842842850.7254464286
44
222021024104857612409625612.81216281.62822820.1420454545
45
232121024104857612409625612.19047619124280.38095242822820.5774456522
46
242221024104857612409625611.636363641114279.27272732802820.9765625
47
48
128KiB records
ashift=9
49
422128131072951225612812805125125130.1953125
50
532128131072951225685.33333333851426.66666674284290.546875
51
6421281310729512256646403843843840
52
752128131072951225651.2511358.43603600.4464285714
53
862128131072951225642.66666667424341.33333333423420.1953125
54
972128131072951225636.57142857364329.14285713303300.2604166667
55
10821281310729512256323203203203210.3125
56
1192128131072951225628.44444444284312.88888893143150.6747159091
57
12102128131072951225625.6256307.23083090.5859375
58
13112128131072951225623.27272727233302.54545453043061.141826923
59
14122128131072951225621.33333333214298.66666673003000.4464285714
60
15132128131072951225619.69230769199295.38461542962970.546875
61
16142128131072951225618.28571429184292.57142862942940.48828125
62
17152128131072951225617.06666667171290.13333332922941.332720588
63
181621281310729512256161602882882880
64
19172128131072951225615.05882353151286.11764712882880.6578947368
65
20182128131072951225614.22222222144284.44444442862881.25
66
21192128131072951225613.47368421139282.94736842842850.7254464286
67
22202128131072951225612.81216281.62822820.1420454545
68
23212128131072951225612.19047619124280.38095242822820.5774456522
69
24222128131072951225611.636363641114279.27272732802820.9765625
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...