Since broker A persists all messages on disk, the buffer is the on-disk file (with recent data cached in file system buffer).
Thanks, Jun On Fri, Jun 28, 2013 at 5:41 PM, Yu, Libo <libo...@citi.com> wrote: > Hi, > > Assume A and B are two brokers in a kafka server. And there is long network > Latency between A and B. For a partition with two replications, one > replication > Is assigned to A and the other is assigned to B. Number of acknowledge is > set > to one. Assume the partition is handled by broker A. > > After a message is accepted and saved by A, ack will be sent and the > message > will be sent to broker B at the same time. But due to long network latency > between > A and B, it is possible that B lags behind A. In this case, is there a > buffer on broker A > that holds all messages to be written to B? Is there any limit on the lag > between A > and B? > > Compare with the case when there is no network latency between A and B, any > difference in publishing speed? > > Thanks > > Libo > >
