| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "kudu/tserver/tablet_server_options.h" |
| |
| #include <ostream> |
| |
| #include <gflags/gflags.h> |
| #include <glog/logging.h> |
| |
| #include "kudu/gutil/macros.h" |
| #include "kudu/master/master.h" |
| #include "kudu/server/rpc_server.h" |
| #include "kudu/tserver/tablet_server.h" |
| #include "kudu/util/flag_tags.h" |
| #include "kudu/util/monotime.h" |
| #include "kudu/util/status.h" |
| |
| DEFINE_string(tserver_master_addrs, "127.0.0.1:7051", |
| "Comma separated addresses of the masters which the " |
| "tablet server should connect to. The masters do not " |
| "read this flag -- configure the masters separately " |
| "using 'rpc_bind_addresses'."); |
| TAG_FLAG(tserver_master_addrs, stable); |
| |
| DEFINE_uint32(tablet_apply_pool_overload_threshold_ms, 0, |
| "The threshold for the queue time of the 'apply' thread pool " |
| "to enter and exit overloaded state. Once the queue stalls and " |
| "its queue times become longer than the specified threshold, it " |
| "enters the overloaded state. Tablet server rejects incoming " |
| "write requests with some probability when its apply queue is " |
| "overloaded. The longer the apply queue stays overloaded, the " |
| "greater the probability of the rejection. In addition, the more " |
| "row operations a write request has, the greater the probablity " |
| "of the rejection. The apply queue exits the overloaded state " |
| "when queue times drop below the specified threshold. Set this " |
| "flag to 0 to disable the behavior described above."); |
| TAG_FLAG(tablet_apply_pool_overload_threshold_ms, advanced); |
| |
| namespace kudu { |
| namespace tserver { |
| |
| TabletServerOptions::TabletServerOptions() { |
| rpc_opts.default_port = TabletServer::kDefaultPort; |
| if (FLAGS_tablet_apply_pool_overload_threshold_ms > 0) { |
| apply_queue_overload_threshold = MonoDelta::FromMilliseconds( |
| FLAGS_tablet_apply_pool_overload_threshold_ms); |
| } |
| Status s = HostPort::ParseStrings(FLAGS_tserver_master_addrs, |
| master::Master::kDefaultPort, |
| &master_addresses); |
| if (!s.ok()) { |
| LOG(FATAL) << "Couldn't parse tablet_server_master_addrs flag: " << s.ToString(); |
| } |
| } |
| |
| } // namespace tserver |
| } // namespace kudu |
