DNS caches that support partitioning ?
marka at isc.org
Sun Aug 19 21:37:31 UTC 2012
In message <DDF607B5-415B-41E8-9222-EB549D3DBB0C at semihuman.com>, Chris Woodfiel
> What Patrick said. For large sites that offer services in multiple data =
> centers on multiple IPs that can individually fail at any time, 300 =
> seconds is actually a bit on the long end.
Which is why the DNS supports multiple address records. Clients
don't have to wait a minutes to fallover to a second address. One
doesn't have to point all the addresses returned to the closest
data center. One can get sub-second fail over in clients as HE
As for the original problem. LRU replacement will keep "hot" items in
the cache unless it is seriously undersized.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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