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Unlink vs. DEL – A deep dive into how it works internally in Redis
A couple of days back, I found myself debating the differences between Redis' `UNLINK` and `DEL` commands with my friend Sarthak in a social media comment section. An interesting take, I come across that majority of the people seemed to believe is "`DEL` is a blocking command. while `UNLINK` is non-blocking - so `UNLINK` is better". It's somewhat true - but I don't fully agree with this characterisation. Here are my thoughts.
A couple of days back, I found myself debating the differences between Redis' UNLINK and DEL commands with my friend Sarthak in a social media comment section. As an engineer, it's my moral duty to unnecessarily dive into the rabbit hole and dig into the Redis codebase to see the actual implementation. Fun fact - In redis 6.0, a new configuration lazyfree-lazy-user-del was introduced - so if this is set to true, your DEL command runs like UNLINK.
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