Bytes KB MB TB PB..
bytes PB .. MB TB kb
2023-06-13 09:15:24 时间
(1<<n) != (1L<<n)
1KB = 1024 Bytes = 2^10 Bytes = (1L << 10) Bytes
1Page = 4KB = 4096 Bytes = 4 * 1024 Bytes = 2^2 * 2^10 Bytes = 2^12 Bytes = (1L << 12) Bytes
1Block = 1M = 1024 * 1KB = 1048576 Bytes = (1L << 20) Bytes
so
1MB = (1L << 20) Bytes
128MB = (128L << 20) Bytes
1GB=(1024 * 1MB) = (1L < 30)Bytes
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