43
99.3%
99.2%
99.1%
99.0%
98.9%
98.8%
98.7%
98.6%
98.5%
98.4%
98.3%
98.2%
98.1%
98.0%
97.9%
97.8%
97.7%
97.6%
5h 2m
5h 46m
6h 29m
7h 12m
7h 55m
8h 38m
9h 22m
10h 5m
10h 48m
11h 31m
12h 14m
12h 58m
13h 41m
14h 24m
15h 7m
15h 50m
16h 34m
17h 17m
2d 13h 19m
2d 22h 5m
3d 6h 50m
3d 15h 36m
4d 0h 22m
4d 9h 7m
4d 17h 53m
5d 2h 38m
5d 11h 24m
5d 20h 10m
6d 4h 55m
6d 13h 41m
6d 22h 26m
7d 7h 12m
7d 15h 58m
8d 0h 43m
8d 9h 29m
8d 18h 14m
96.6%
96.5%
96.4%
96.3%
96.2%
96.1%
96.0%
95.9%
95.8%
95.7%
95.6%
95.5%
95.4%
95.3%
95.2%
95.1%
95.0%
1d 0h 29m
1d 1h 12m
1d 1h 55m
1d 2h 38m
1d 3h 22m
1d 4h 5m
1d 4h 48m
1d 5h 31m
1d 6h 14m
1d 6h 58m
1d 7h 41m
1d 8h 24m
1d 9h 7m
1d 9h 50m
1d 10h 34m
1d 11h 17m 1d
12h 0m
12d 9h 50m
12d 18h 36m
13d 3h 22m
13d 12h 7m
13d 20h 53m
14d 5h 38m
14d 14h 24m
14d 23h 10m
15d 7h 55m
15d 16h 41m
16d 1h 26m
16d 10h 12m
16d 18h 58m
17d 3h 43m
17d 12h 29m
17d 21h 14m
18d 6h 0m
Dari tabel diatas menunjukkan korespondensi antara sistem
availability
dan downtime per-bulan dan per-tahun. Istilah “Five nines”
sama dengan 99.999 yang artinya sistem memiliki downtime
selama 5.3
menit per-tahun. Biaya ketersediaan meningkat secara eksponensial dengan
setiap penambahan angka ‘9’.
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