Re: node vs node latency

2012-07-07 Thread Tyler Hobbs
Those latencies look like the difference between a couple of disk seeks and reading something that's already in the os cache. The dynamic snitch will favor nodes with lower latencies. Once a node has served enough reads, it might not have to hit disk very often, which produces lower latencies. S

node vs node latency

2012-07-06 Thread Deno Vichas
all, what would explain a huge different (12ms vs 0.1ms) in read latency from node to node. i've got a 4 node cluster w/ replication factor of 3 using hector. i'm seeing these numbers with nodetool cfstats. thx, deno