I know when I run tail -n $someBigNumber ./someBigFile, it

Question

I know when I run tail -n $someBigNumber ./someBigFile, it

is not much memory intensive. (correct me!)
Because it reads the file in backward direction from the EOF until it sees $someBigNumber "\n" characters. Then it prints the lines in forward direction, by reading them directly from the file line by line, without loading them into the memory.

But I think, when I run ./getSomeBigStream | tail -n $someBigNumber, it needs a large amount of memory size, depending to $someBigNumber, because the tail command doesn't know when it will reach EOF, so it should always hold $someBigNumber of lines in the memory.

Am I right?

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17.09.2024

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Link 🪈 · Accepted Answer

Link 🪈

You can check tail's source to see how it works

0

17.09.2024

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I know when I run tail -n $someBigNumber ./someBigFile, it

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