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Is it possible to evict partial of cached file ? #79

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aero opened this issue Jun 4, 2020 · 1 comment

aero commented Jun 4, 2020

Hello,

cachectl( https://github.com/cubicdaiya/cachectl ) supports -r option.

If you want to leave a cache appended recently, assigning a rate for purging page cache with -r is recommended.

cachectl -op purge -f /var/log/access_log -r 0.9

Can I get the same fuctionality with vmtouch ?

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Owner

hoytech commented Jun 4, 2020 •

edited

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Not exactly the same, but you can choose a range of the file to evict with -p. For example, suppose you had a 100M file, you could run:

vmtouch -e -p 0-90M /var/log/access_log

To evict the first 90M of the file and leave the remaining unevicted.

How does cachectl decide which part of the file to evict?

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