In message <DDF607B5-415B-41E8-9222-EB549D3DBB0C@semihuman.com>, Chris Woodfiel d writes:
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.
-C
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 code shows. As for the original problem. LRU replacement will keep "hot" items in the cache unless it is seriously undersized. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org