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Temporary files: RAM or disk?Temporary files: RAM or disk?Posted Jun 5, 2012 1:31 UTC (Tue) by vonbrand (subscriber, #4458)In reply to: Temporary files: RAM or disk? by bronson Parent article: Temporary files: RAM or disk?
I believe you mean they require swap? At least a DNS resolver rapidly accumulates a huge database to keep in RAM, that is relatively rarely used.
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Temporary files: RAM or disk? Posted Jun 5, 2012 6:25 UTC (Tue) by bronson (subscriber, #4806) [Link]
Very true, there have been caching DNS servers that malloc everything and let the VM handle the disk. BIND gained a reputation for absolutely shredding swap space, especially if you were running more than one instance on a box. Now that BIND has its sharable databse plus hooks to use mysql/postgres/ldap/etc, I don't think it works like that anymore...? (I haven't used BIND in quite a while, hallelujah).
Lots of other DNS servers use their own databases and handle caching themselves (tinydns, powerdns, djb). maradns is the one exception I know of, but I don't think it has seen much adoption...?
You make an excellent point, this is a great example of swap usage ont he server. Nevertheless, I'm still under the impression that my "most servers don't want swap" statement still holds.
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