Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Jan Lehnardt @janl@narrativ.es

2/6/2026, 11:16:06 AM

Public

RE: https://mas.to/@zekjur/116022397626943871

Just yesterday I discussed a feature of @couchdbApache CouchDB’s storage engine:

CouchDB allows you to store binary data as document attachments.

Opening a database file happens by reading backwards from its end until we find a valid footer.

What if you attach a database file? How can we distinguish a genuine footer from an attachment footer?

Easy, attachment data is written in 4k blocks with a null byte in between, which breaks footer validation.

One downside: we cannot sendfile(2) attachments.

If you have a fediverse account, you can quote this note from your own instance. Search https://narrativ.es/users/janl/statuses/116023398662310347 on your instance and quote it. (Note that quoting is not supported in Mastodon.)