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 metasyntactical | Is a nix cache sufficient to enable offline rebuilding of packages? | 20:48:27 |
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 Jonas Chevalier | it depends if you also copied the build dependencies or only the runtime dependencies. but yes ,in general it should be enough | 13:06:29 |
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 @linus:schreibt.jetzt | In reply to @julienmalka:matrix.org
Do we have measures of the total deduplication of an attic cache ? attic doesn't currently have a built-in command for it but it should be pretty easy to get from the db | 08:51:14 |
| @linus:schreibt.jetzt | attic=# select sum(file_size) / (select sum(nar_size) from nar) from chunk;
?column?
------------------------
0.20098691256561418637
(1 row)
| 08:52:57 |
| @linus:schreibt.jetzt | so I guess I'm using 20% as much storage for nars as I would be without dedup | 08:53:15 |
| @linus:schreibt.jetzt | *and compression | 08:53:30 |
| @linus:schreibt.jetzt | of course that isn't entirely representative of how much space the cache takes up including file metadata and the database | 08:54:44 |
| @linus:schreibt.jetzt | but I think nars would be the bulk of my binary cache, so that's already a useful number ^^ | 08:55:09 |
 Julien | Given the state of things with AWS hosting it would be interesting to see how much of that dedup we could benefit from in the cache.nixos.org binary cache without asking for demesurate computationnal stress to the server | 08:55:07 |
| @linus:schreibt.jetzt | yeah | 08:55:57 |
| @linus:schreibt.jetzt | I know some people were interested in looking into options there, do you know if anyone's actually doing anything on that front? | 08:56:25 |
