cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From A J <>
Subject Host score calculation for dynamic_snitch
Date Fri, 08 Apr 2011 20:27:48 GMT
dynamic_snitch seems to do host score calculation to figure the
latency of each node.

What are the details of this calculation :
1. What is the mechanism to determine latency ?
2. Does it score the calculated scores and use the historical figures
to come up with the latest scores ? (You can't just base the latency
based on a singular ping)
3. Where are these scores stored ? In the cassandra database somewhere ?
4. cassandra.yaml also says that dynamic_snitch_update_interval_in_ms
"controls how often to perform the more expensive part of host score
calculation". What is the expensive part and how expensive is it?


View raw message