expiration time passed to the method (a value of zero causes an immediate
flush). The operation is not atomic to multiple servers, just atomic to a
single server. That is, it will flush the servers in the order that they were
expiration time passed to the method (a value of zero causes an immediate
flush). The operation is not atomic to multiple servers, just atomic to a
single server. That is, it will flush the servers in the order that they were