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.bp
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.SH
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Appendix:
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Maximum File Sizes in the 64-bit File Server
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.PP
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The maximum size of a single file in a Plan 9 file server's
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file system with 64-bit block numbers
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is determined by the file system block size
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(there are single, double, triple and quadruple indirect blocks).
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The maximum size is thus
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$d ( 6 + x + x sup 2 + x sup 3 + x sup 4 )$
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bytes, where
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$d = blocksize - ( 2 + 2 + 8 )$
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and
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$x = left floor d over 8 right floor$,
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8 being the size in bytes of a
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.I "long long"
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block number.
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.LP
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Note that
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$2 sup 63 ~ = ~ 9,223,372,036,854,775,808 ~ = ~ 8$
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EB (binary exabytes).
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.LP
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.KS
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.TS
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center ;
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c s s
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c c c
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n n n .
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Maximum File Sizes
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blocksize max. file size in bytes
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_
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1k 239.455G 257,112,525,120
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2k 7.73795T 8,507,967,771,456
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3k 59.4174T 65,330,091,351,360
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4k 251.779T 276,833,619,879,744
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5k 770.93T 847,646,649,807,168
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6k 1.87752P 2,113,900,586,253,120
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7k 4.0645P 4,576,215,491,839,296
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8k 7.93382P 8,932,685,435,522,880
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_
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9k 14.3102P 16,111,863,841,429,824
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10k 24.2524P 27,305,748,837,688,128
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11k 39.0823P 44,002,768,605,261,120
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12k 60.4146P 68,020,766,726,780,736
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13k 90.1856P 101,539,987,535,380,800
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14k 130.683P 147,136,061,463,530,304
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15k 184.575P 207,812,990,391,866,688
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16k 254.939P 287,036,132,998,029,120
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_
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17k 345.293P 388,765,190,105,491,776
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18k 459.621P 517,487,190,032,397,120
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19k 602.407P 678,249,473,940,389,184
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20k 778.66P 876,692,681,183,446,848
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21k 993.946P 1,119,083,734,656,717,120
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22k 1.22502E 1,412,348,826,145,348,416
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23k 1.53012E 1,764,106,401,673,323,840
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24k 1.89319E 2,182,700,146,852,294,464
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25k 2.32213E 2,677,231,972,230,412,608
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26k 2.82551E 3,257,594,998,641,165,120
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27k 3.41264E 3,934,506,542,552,206,656
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28k 4.09355E 4,719,541,101,414,192,960
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29k 4.87905E 5,625,163,339,009,614,144
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30k 5.78076E 6,664,761,070,801,627,968
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31k 6.81111E 7,852,678,249,282,893,120
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32k 7.98341E 9,204,247,949,324,402,496
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_
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33k 9.31184E 10,735,825,353,524,316,480
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\&...
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48k 60.666E 69,943,138,363,646,533,440
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\&...
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56k 131.149E 151,204,569,706,075,533,120
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\&...
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64k 255.734E 294,841,790,119,418,167,104
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.TE
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.KE
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