[ Insert something with Murphy's law and the send command ] On Wed, Jan 24, 2007 at 12:06:04PM +0100, Erik Romijn wrote: > On Tue, Jan 23, 2007 at 11:32:28AM -0500, Larry J. Blunk wrote: > > perhaps an indexed array of peer IP/AS numbers. > > Nice idea. But how much would we save? > [..] > We save about 0.85Mbyte here. A RIS RIB dump on the biggest machine is > 240M uncompressed. So we would save 0.35%.
I'm mixing up again here. That RIS RIB dump is not 200K routes, that would be a FIB dump. The RIB dump is approximately 30M entries. So that's 1440Mbits of data on peer IP/AS without indexing (with asn16/ipv4). With indexing, it's 480Mbits. So we go from 180MB to 60MB. So we save about 120MB of the 240MB. That's 50%. For asn16/ipv4. If we get to asn32/ipv6, this will even be a lot more. Note that this may not neccesarily decrease the size of the compressed dump files. I can imagine that gzip/bzip already do something like this. Short: yes, it seems to save significant data, unless I miscalculated again :-) cheers, -- Erik Romijn RIPE NCC jr. software engineer http://www.ripe.net/ Information Services dept.
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