Re: minimum number of machines for RF=3

2011-07-07 Thread Peter Schuller
> is this behaviour expected since the RF (for the duration of when 1 node was > taken out) > is higher than the # of nodes? Note that repair is not needed just because a node was off for a while. I am guessing the performance difference was due to the repair. Try running repair at any time and s

Re: minimum number of machines for RF=3

2011-07-07 Thread david lee
cheers~ On 7 July 2011 19:41, Watanabe Maki wrote: > It is expected behaviour and not relate on number of node. > After the failed node bringing back, the ring will be busy by Hinted > Handoff rewriting and Read Repair. If you run repair, all your 3 nodes need > to build Merkel Tree, compare the

Re: minimum number of machines for RF=3

2011-07-07 Thread Watanabe Maki
It is expected behaviour and not relate on number of node. After the failed node bringing back, the ring will be busy by Hinted Handoff rewriting and Read Repair. If you run repair, all your 3 nodes need to build Merkel Tree, compare the hash values, then transfer latest data to each other. You

minimum number of machines for RF=3

2011-07-07 Thread david lee
hi guys, is there a minimum(recommended) number of machines for RF=3? i encountered a test result where # of nodes = 3 RF = 3 CL.READ=QUORUM and when 1 node was taken out and back in after which node repair was run, the TPS dropped significantly. is this behaviour expected since the RF (for th