ref: 633bac1e917fe558b35846ffcc729ec2d47d4c99
dir: /sys/doc/fs/pa/
.bp .SH Appendix: Maximum File Sizes in the 64-bit File Server .PP The maximum size of a single file in a Plan 9 file server's file system with 64-bit block numbers is determined by the file system block size (there are single, double, triple and quadruple indirect blocks). The maximum size is thus $d ( 6 + x + x sup 2 + x sup 3 + x sup 4 )$ bytes, where $d = blocksize - ( 2 + 2 + 8 )$ and $x = left floor d over 8 right floor$, 8 being the size in bytes of a .I "long long" block number. .LP Note that $2 sup 63 ~ = ~ 9,223,372,036,854,775,808 ~ = ~ 8$ EB (binary exabytes). .LP .KS .TS center ; c s s c c c n n n . Maximum File Sizes blocksize max. file size in bytes _ 1k 239.455G 257,112,525,120 2k 7.73795T 8,507,967,771,456 3k 59.4174T 65,330,091,351,360 4k 251.779T 276,833,619,879,744 5k 770.93T 847,646,649,807,168 6k 1.87752P 2,113,900,586,253,120 7k 4.0645P 4,576,215,491,839,296 8k 7.93382P 8,932,685,435,522,880 _ 9k 14.3102P 16,111,863,841,429,824 10k 24.2524P 27,305,748,837,688,128 11k 39.0823P 44,002,768,605,261,120 12k 60.4146P 68,020,766,726,780,736 13k 90.1856P 101,539,987,535,380,800 14k 130.683P 147,136,061,463,530,304 15k 184.575P 207,812,990,391,866,688 16k 254.939P 287,036,132,998,029,120 _ 17k 345.293P 388,765,190,105,491,776 18k 459.621P 517,487,190,032,397,120 19k 602.407P 678,249,473,940,389,184 20k 778.66P 876,692,681,183,446,848 21k 993.946P 1,119,083,734,656,717,120 22k 1.22502E 1,412,348,826,145,348,416 23k 1.53012E 1,764,106,401,673,323,840 24k 1.89319E 2,182,700,146,852,294,464 25k 2.32213E 2,677,231,972,230,412,608 26k 2.82551E 3,257,594,998,641,165,120 27k 3.41264E 3,934,506,542,552,206,656 28k 4.09355E 4,719,541,101,414,192,960 29k 4.87905E 5,625,163,339,009,614,144 30k 5.78076E 6,664,761,070,801,627,968 31k 6.81111E 7,852,678,249,282,893,120 32k 7.98341E 9,204,247,949,324,402,496 _ 33k 9.31184E 10,735,825,353,524,316,480 \&... 48k 60.666E 69,943,138,363,646,533,440 \&... 56k 131.149E 151,204,569,706,075,533,120 \&... 64k 255.734E 294,841,790,119,418,167,104 .TE .KE