tendermint/v0.33/assets/js/93.359222ed.js

(window.webpackJsonp=window.webpackJsonp||[]).push([[93],{657:function(e,t,n){"use strict";n.r(t);var o=n(0),a=Object(o.a)({},(function(){var e=this,t=e.$createElement,n=e._self._c||t;return n("ContentSlotsDistributor",{attrs:{"slot-key":e.$parent.slotKey}},[n("h1",{attrs:{id:"running-in-production"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#running-in-production"}},[e._v("#")]),e._v(" Running in production")]),e._v(" "),n("h2",{attrs:{id:"database"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#database"}},[e._v("#")]),e._v(" Database")]),e._v(" "),n("p",[e._v("By default, Tendermint uses the "),n("code",[e._v("syndtr/goleveldb")]),e._v(" package for its in-process\nkey-value database. Unfortunately, this implementation of LevelDB seems to suffer under heavy load (see\n"),n("a",{attrs:{href:"https://github.com/syndtr/goleveldb/issues/226",target:"_blank",rel:"noopener noreferrer"}},[e._v("#226"),n("OutboundLink")],1),e._v("). It may be best to\ninstall the real C-implementation of LevelDB and compile Tendermint to use\nthat using "),n("code",[e._v("make build TENDERMINT_BUILD_OPTIONS=cleveldb")]),e._v(". See the "),n("RouterLink",{attrs:{to:"/introduction/install.html"}},[e._v("install instructions")]),e._v(" for details.")],1),e._v(" "),n("p",[e._v("Tendermint keeps multiple distinct databases in the "),n("code",[e._v("$TMROOT/data")]),e._v(":")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("blockstore.db")]),e._v(": Keeps the entire blockchain - stores blocks,\nblock commits, and block meta data, each indexed by height. Used to sync new\npeers.")]),e._v(" "),n("li",[n("code",[e._v("evidence.db")]),e._v(": Stores all verified evidence of misbehaviour.")]),e._v(" "),n("li",[n("code",[e._v("state.db")]),e._v(": Stores the current blockchain state (ie. height, validators,\nconsensus params). Only grows if consensus params or validators change. Also\nused to temporarily store intermediate results during block processing.")]),e._v(" "),n("li",[n("code",[e._v("tx_index.db")]),e._v(": Indexes txs (and their results) by tx hash and by DeliverTx result events.")])]),e._v(" "),n("p",[e._v("By default, Tendermint will only index txs by their hash, not by their DeliverTx\nresult events. See "),n("RouterLink",{attrs:{to:"/app-dev/indexing-transactions.html"}},[e._v("indexing transactions")]),e._v(" for\ndetails.")],1),e._v(" "),n("p",[e._v("There is no current strategy for pruning the databases. Consider reducing\nblock production by "),n("RouterLink",{attrs:{to:"/tendermint-core/using-tendermint.html#no-empty-blocks"}},[e._v("controlling empty blocks")]),e._v("\nor by increasing the "),n("code",[e._v("consensus.timeout_commit")]),e._v(" param. Note both of these are\nlocal settings and not enforced by the consensus.")],1),e._v(" "),n("p",[e._v("We're working on "),n("a",{attrs:{href:"https://github.com/tendermint/tendermint/issues/828",target:"_blank",rel:"noopener noreferrer"}},[e._v("state\nsyncing"),n("OutboundLink")],1),e._v(",\nwhich will enable history to be thrown away\nand recent application state to be directly synced. We'll need to develop solutions\nfor archival nodes that allow queries on historical transactions and states.\nThe Cosmos project has had much success just dumping the latest state of a\nblockchain to disk and starting a new chain from that state.")]),e._v(" "),n("h2",{attrs:{id:"logging"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#logging"}},[e._v("#")]),e._v(" Logging")]),e._v(" "),n("p",[e._v("Default logging level ("),n("code",[e._v("main:info,state:info,*:")]),e._v(") should suffice for\nnormal operation mode. Read "),n("a",{attrs:{href:"https://blog.cosmos.network/one-of-the-exciting-new-features-in-0-10-0-release-is-smart-log-level-flag-e2506b4ab756",target:"_blank",rel:"noopener noreferrer"}},[e._v("this\npost"),n("OutboundLink")],1),e._v("\nfor details on how to configure "),n("code",[e._v("log_level")]),e._v(" config variable. Some of the\nmodules can be found "),n("RouterLink",{attrs:{to:"/tendermint-core/how-to-read-logs.html#list-of-modules"}},[e._v("here")]),e._v(". If\nyou're trying to debug Tendermint or asked to provide logs with debug\nlogging level, you can do so by running tendermint with\n"),n("code",[e._v('--log_level="*:debug"')]),e._v(".")],1),e._v(" "),n("h2",{attrs:{id:"write-ahead-logs-wal"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#write-ahead-logs-wal"}},[e._v("#")]),e._v(" Write Ahead Logs (WAL)")]),e._v(" "),n("p",[e._v("Tendermint uses write ahead logs for the consensus ("),n("code",[e._v("cs.wal")]),e._v(") and the mempool\n("),n("code",[e._v("mempool.wal")]),e._v("). Both WALs have a max size of 1GB and are automatically rotated.")]),e._v(" "),n("h3",{attrs:{id:"consensus-wal"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#consensus-wal"}},[e._v("#")]),e._v(" Consensus WAL")]),e._v(" "),n("p",[e._v("The "),n("code",[e._v("consensus.wal")]),e._v(" is used to ensure we can recover from a crash at any point\nin the consensus state machine.\nIt writes all consensus messages (timeouts, proposals, block part, or vote)\nto a single file, flushing to disk before processing messages from its own\nvalidator. Since Tendermint validators are expected to never sign a conflicting vote, the\nWAL ensures we can always recover deterministically to the latest state of the consensus without\nusing the network or re-signing any consensus messages.")]),e._v(" "),n("p",[e._v("If your "),n("code",[e._v("consensus.wal")]),e._v(" is corrupted, see "),n("a",{attrs:{href:"#wal-corruption"}},[e._v("below")]),e._v(".")]),e._v(" "),n("h3",{attrs:{id:"mempool-wal"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#mempool-wal"}},[e._v("#")]),e._v(" Mempool WAL")]),e._v(" "),n("p",[e._v("The "),n("code",[e._v("mempool.wal")]),e._v(" logs all incoming txs before running CheckTx, but is\notherwise not used in any programmatic way. It's just a kind of manual\nsafe guard. Note the mempool provides no durability guarantees - a tx sent to one or many nodes\nmay never make it into the blockchain if those nodes crash before being able to\npropose it. Clients must monitor their txs by subscribing over websockets,\npolling for them, or using "),n("code",[e._v("/broadcast_tx_commit")]),e._v(". In the worst case, txs can be\nresent from the mempool WAL manually.")]),e._v(" "),n("p",[e._v("For the above reasons, the "),n("code",[e._v("mempool.wal")]),e._v(" is disabled by default. To enable, set\n"),n("code",[e._v("mempool.wal_dir")]),e._v(" to where you want the WAL to be located (e.g.\n"),n("code",[e._v("data/mempool.wal")]),e._v(").")]),e._v(" "),n("h2",{attrs:{id:"dos-exposure-and-mitigation"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#dos-exposure-and-mitigation"}},[e._v("#")]),e._v(" DOS Exposure and Mitigation")]),e._v(" "),n("p",[e._v("Validators are supposed to setup "),n("a",{attrs:{href:"https://blog.cosmos.network/tendermint-explained-bringing-bft-based-pos-to-the-public-blockchain-domain-f22e274a0fdb",target:"_blank",rel:"noopener noreferrer"}},[e._v("Sentry Node\nArchitecture"),n("OutboundLink")],1),e._v("\nto prevent Denial-of-service attacks. You can read more about it\n"),n("RouterLink",{attrs:{to:"/interviews/tendermint-bft.html"}},[e._v("here")]),e._v(".")],1),e._v(" "),n("h3",{attrs:{id:"p2p"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#p2p"}},[e._v("#")]),e._v(" P2P")]),e._v(" "),n("p",[e._v("The core of the Tendermint peer-to-peer system is "),n("code",[e._v("MConnection")]),e._v(". Each\nconnection has "),n("code",[e._v("MaxPacketMsgPayloadSize")]),e._v(", which is the maximum packet\nsize and bounded send & receive queues. One can impose restrictions on\nsend & receive rate per connection ("),n("code",[e._v("SendRate")]),e._v(", "),n("code",[e._v("RecvRate")]),e._v(").")]),e._v(" "),n("h3",{attrs:{id:"rpc"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#rpc"}},[e._v("#")]),e._v(" RPC")]),e._v(" "),n("p",[e._v("Endpoints returning multiple entries are limited by default to return 30\nelements (100 max). See the "),n("a",{attrs:{href:"https://docs.tendermint.com/v0.33/rpc/",target:"_blank",rel:"noopener noreferrer"}},[e._v("RPC Documentation"),n("OutboundLink")],1),e._v("\nfor more information.")]),e._v(" "),n("p",[e._v("Rate-limiting and authentication are another key aspects to help protect\nagainst DOS attacks. While in the future we may implement these\nfeatures, for now, validators are supposed to use external tools like\n"),n("a",{attrs:{href:"https://www.nginx.com/blog/rate-limiting-nginx/",target:"_blank",rel:"noopener noreferrer"}},[e._v("NGINX"),n("OutboundLink")],1),e._v(" or\n"),n("a",{attrs:{href:"https://docs.traefik.io/middlewares/ratelimit/",target:"_blank",rel:"noopener noreferrer"}},[e._v("traefik"),n("OutboundLink")],1),e._v("\nto achieve the same things.")]),e._v(" "),n("h2",{attrs:{id:"debugging-tendermint"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#debugging-tendermint"}},[e._v("#")]),e._v(" Debugging Tendermint")]),e._v(" "),n("p",[e._v("If you ever have to debug Tendermint, the first thing you should probably do is\ncheck out the logs. See "),n("RouterLink",{attrs:{to:"/tendermint-core/how-to-read-logs.html"}},[e._v("How to read logs")]),e._v(", where we\nexplain what certain log statements mean.")],1),e._v(" "),n("p",[e._v("If, after skimming through the logs, things are not clear still, the next thing\nto try is querying the "),n("code",[e._v("/status")]),e._v(" RPC endpoint. It provides the necessary info:\nwhenever the node is syncing or not, what height it is on, etc.")]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"sh",base64:"Y3VybCBodHRwKHMpOi8ve2lwfTp7cnBjUG9ydH0vc3RhdHVzCg=="}}),e._v(" "),n("p",[n("code",[e._v("/dump_consensus_state")]),e._v(" will give you a detailed overview of the consensus\nstate (proposer, latest validators, peers states). From it, you should be able\nto figure out why, for example, the network had halted.")]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"sh",base64:"Y3VybCBodHRwKHMpOi8ve2lwfTp7cnBjUG9ydH0vZHVtcF9jb25zZW5zdXNfc3RhdGUK"}}),e._v(" "),n("p",[e._v("There is a reduced version of this endpoint - "),n("code",[e._v("/consensus_state")]),e._v(", which returns\njust the votes seen at the current height.")]),e._v(" "),n("p",[e._v("If, after consulting with the logs and above endpoints, you still have no idea\nwhat's happening, consider using "),n("code",[e._v("tendermint debug kill")]),e._v(" sub-command. This\ncommand will scrap all the available info and kill the process. See\n"),n("RouterLink",{attrs:{to:"/tools/debugging.html"}},[e._v("Debugging")]),e._v(" for the exact format.")],1),e._v(" "),n("p",[e._v("You can inspect the resulting archive yourself or create an issue on\n"),n("a",{attrs:{href:"https://github.com/tendermint/tendermint",target:"_blank",rel:"noopener noreferrer"}},[e._v("Github"),n("OutboundLink")],1),e._v(". Before opening an issue\nhowever, be sure to check if there's "),n("a",{attrs:{href:"https://github.com/tendermint/tendermint/issues",target:"_blank",rel:"noopener noreferrer"}},[e._v("no existing\nissue"),n("OutboundLink")],1),e._v(" already.")]),e._v(" "),n("h2",{attrs:{id:"monitoring-tendermint"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#monitoring-tendermint"}},[e._v("#")]),e._v(" Monitoring Tendermint")]),e._v(" "),n("p",[e._v("Each Tendermint instance has a standard "),n("code",[e._v("/health")]),e._v(" RPC endpoint, which responds\nwith 200 (OK) if everything is fine and 500 (or no response) - if something is\nwrong.")]),e._v(" "),n("p",[e._v("Other useful endpoints include mentioned earlier "),n("code",[e._v("/status")]),e._v(", "),n("code",[e._v("/net_info")]),e._v(" and\n"),n("code",[e._v("/validators")]),e._v(".")]),e._v(" "),n("p",[e._v("Tendermint also can report and serve Prometheus metrics. See\n"),n("RouterLink",{attrs:{to:"/tendermint-core/metrics.html"}},[e._v("Metrics")]),e._v(".")],1),e._v(" "),n("p",[n("code",[e._v("tendermint debug dump")]),e._v(" sub-command can be used to periodically dump useful\ninformation into an archive. See "),n("RouterLink",{attrs:{to:"/tools/debugging.html"}},[e._v("Debugging")]),e._v(" for more\ninformation.")],1),e._v(" "),n("h2",{attrs:{id:"what-happens-when-my-app-dies"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#what-happens-when-my-app-dies"}},[e._v("#")]),e._v(" What happens when my app dies?")]),e._v(" "),n("p",[e._v("You are supposed to run Tendermint under a "),n("a",{attrs:{href:"https://en.wikipedia.org/wiki/Process_supervision",target:"_blank",rel:"noopener noreferrer"}},[e._v("process\nsupervisor"),n("OutboundLink")],1),e._v(" (like\nsystemd or runit). It will ensure Tendermint is always running (despite\npossible errors).")]),e._v(" "),n("p",[e._v("Getting back to the original question, if your application dies,\nTendermint will panic. After a process supervisor restarts your\napplication, Tendermint should be able to reconnect successfully. The\norder of restart does not matter for it.")]),e._v(" "),n("h2",{attrs:{id:"signal-handling"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#signal-handling"}},[e._v("#")]),e._v(" Signal handling")]),e._v(" "),n("p",[e._v("We catch SIGINT and SIGTERM and try to clean up nicely. For other\nsignals we use the default behaviour in Go: "),n("a",{attrs:{href:"https://golang.org/pkg/os/signal/#hdr-Default_behavior_of_signals_in_Go_programs",target:"_blank",rel:"noopener noreferrer"}},[e._v("Default behavior of signals\nin Go\nprograms"),n("OutboundLink")],1),e._v(".")]),e._v(" "),n("h2",{attrs:{id:"corruption"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#corruption"}},[e._v("#")]),e._v(" Corruption")]),e._v(" "),n("p",[n("strong",[e._v("NOTE:")]),e._v(" Make sure you have a backup of the Tendermint data directory.")]),e._v(" "),n("h3",{attrs:{id:"possible-causes"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#possible-causes"}},[e._v("#")]),e._v(" Possible causes")]),e._v(" "),n("p",[e._v("Remember that most corruption is caused by hardware issues:")]),e._v(" "),n("ul",[n("li",[e._v("RAID controllers with faulty / worn out battery backup, and an unexpected power loss")]),e._v(" "),n("li",[e._v("Hard disk drives with write-back cache enabled, and an unexpected power loss")]),e._v(" "),n("li",[e._v("Cheap SSDs with insufficient power-loss protection, and an unexpected power-loss")]),e._v(" "),n("li",[e._v("Defective RAM")]),e._v(" "),n("li",[e._v("Defective or overheating CPU(s)")])]),e._v(" "),n("p",[e._v("Other causes can be:")]),e._v(" "),n("ul",[n("li",[e._v("Database systems configured with fsync=off and an OS crash or power loss")]),e._v(" "),n("li",[e._v("Filesystems configured to use write barriers plus a storage layer that ignores write barriers. LVM is a particular culprit.")]),e._v(" "),n("li",[e._v("Tendermint bugs")]),e._v(" "),n("li",[e._v("Operating system bugs")]),e._v(" "),n("li",[e._v("Admin error (e.g., directly modifying Tendermint data-directory contents)")])]),e._v(" "),n("p",[e._v("(Source: https://wiki.postgresql.org/wiki/Corruption)")]),e._v(" "),n("h3",{attrs:{id:"wal-corruption"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#wal-corruption"}},[e._v("#")]),e._v(" WAL Corruption")]),e._v(" "),n("p",[e._v("If consensus WAL is corrupted at the lastest height and you are trying to start\nTendermint, replay will fail with panic.")]),e._v(" "),n("p",[e._v("Recovering from data corruption can be hard and time-consuming. Here are two approaches you can take:")]),e._v(" "),n("ol",[n("li",[e._v("Delete the WAL file and restart Tendermint. It will attempt to sync with other peers.")]),e._v(" "),n("li",[e._v("Try to repair the WAL file manually:")])]),e._v(" "),n("ol",[n("li",[e._v("Create a backup of the corrupted WAL file:")])]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"Y3AgJnF1b3Q7JFRNSE9NRS9kYXRhL2NzLndhbC93YWwmcXVvdDsgJmd0OyAvdG1wL2NvcnJ1cHRlZF93YWxfYmFja3VwCg=="}}),e._v(" "),n("ol",{attrs:{start:"2"}},[n("li",[e._v("Use "),n("code",[e._v("./scripts/wal2json")]),e._v(" to create a human-readable version")])]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"Li9zY3JpcHRzL3dhbDJqc29uL3dhbDJqc29uICZxdW90OyRUTUhPTUUvZGF0YS9jcy53YWwvd2FsJnF1b3Q7ICZndDsgL3RtcC9jb3JydXB0ZWRfd2FsCg=="}}),e._v(" "),n("ol",{attrs:{start:"3"}},[n("li",[e._v('Search for a "CORRUPTED MESSAGE" line.')]),e._v(" "),n("li",[e._v("By looking at the previous message and the message after the corrupted one\nand looking at the logs, try to rebuild the message. If the consequent\nmessages are marked as corrupted too (this may happen if length header\ngot corrupted or some writes did not make it to the WAL ~ truncation),\nthen remove all the lines starting from the corrupted one and restart\nTendermint.")])]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"JEVESVRPUiAvdG1wL2NvcnJ1cHRlZF93YWwK"}}),e._v(" "),n("ol",{attrs:{start:"5"}},[n("li",[e._v("After editing, convert this file back into binary form by running:")])]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"Li9zY3JpcHRzL2pzb24yd2FsL2pzb24yd2FsIC90bXAvY29ycnVwdGVkX3dhbCAgJFRNSE9NRS9kYXRhL2NzLndhbC93YWwK"}}),e._v(" "),n("h2",{attrs:{id:"hardware"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#hardware"}},[e._v("#")]),e._v(" Hardware")]),e._v(" "),n("h3",{attrs:{id:"processor-and-memory"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#processor-and-memory"}},[e._v("#")]),e._v(" Processor and Memory")]),e._v(" "),n("p",[e._v("While actual specs vary depending on the load and validators count,\nminimal requirements are:")]),e._v(" "),n("ul",[n("li",[e._v("1GB RAM")]),e._v(" "),n("li",[e._v("25GB of disk space")]),e._v(" "),n("li",[e._v("1.4 GHz CPU")])]),e._v(" "),n("p",[e._v("SSD disks are preferable for applications with high transaction\nthroughput.")]),e._v(" "),n("p",[e._v("Recommended:")]),e._v(" "),n("ul",[n("li",[e._v("2GB RAM")]),e._v(" "),n("li",[e._v("100GB SSD")]),e._v(" "),n("li",[e._v("x64 2.0 GHz 2v CPU")])]),e._v(" "),n("p",[e._v("While for now, Tendermint stores all the history and it may require\nsignificant disk space over time, we are planning to implement state\nsyncing (See\n"),n("a",{attrs:{href:"https://github.com/tendermint/tendermint/issues/828",target:"_blank",rel:"noopener noreferrer"}},[e._v("this issue"),n("OutboundLink")],1),e._v("). So,\nstoring all the past blocks will not be necessary.")]),e._v(" "),n("h3",{attrs:{id:"operating-systems"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#operating-systems"}},[e._v("#")]),e._v(" Operating Systems")]),e._v(" "),n("p",[e._v("Tendermint can be compiled for a wide range of operating systems thanks\nto Go language (the list of $OS/$ARCH pairs can be found\n"),n("a",{attrs:{href:"https://golang.org/doc/install/source#environment",target:"_blank",rel:"noopener noreferrer"}},[e._v("here"),n("OutboundLink")],1),e._v(").")]),e._v(" "),n("p",[e._v("While we do not favor any operation system, more secure and stable Linux\nserver distributions (like Centos) should be preferred over desktop\noperation systems (like Mac OS).")]),e._v(" "),n("h3",{attrs:{id:"miscellaneous"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#miscellaneous"}},[e._v("#")]),e._v(" Miscellaneous")]),e._v(" "),n("p",[e._v("NOTE: if you are going to use Tendermint in a public domain, make sure\nyou read "),n("a",{attrs:{href:"https://cosmos.network/validators",target:"_blank",rel:"noopener noreferrer"}},[e._v("hardware recommendations"),n("OutboundLink")],1),e._v(" for a validator in the\nCosmos network.")]),e._v(" "),n("h2",{attrs:{id:"configuration-parameters"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#configuration-parameters"}},[e._v("#")]),e._v(" Configuration parameters")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("p2p.flush_throttle_timeout")])]),e._v(" "),n("li",[n("code",[e._v("p2p.max_packet_msg_payload_size")])]),e._v(" "),n("li",[n("code",[e._v("p2p.send_rate")])]),e._v(" "),n("li",[n("code",[e._v("p2p.recv_rate")])])]),e._v(" "),n("p",[e._v("If you are going to use Tendermint in a private domain and you have a\nprivate high-speed network among your peers, it makes sense to lower\nflush throttle timeout and increase other params.")]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"W3AycF0KCnNlbmRfcmF0ZT0yMDAwMDAwMCAjIDJNQi9zCnJlY3ZfcmF0ZT0yMDAwMDAwMCAjIDJNQi9zCmZsdXNoX3Rocm90dGxlX3RpbWVvdXQ9MTAKbWF4X3BhY2tldF9tc2dfcGF5bG9hZF9zaXplPTEwMjQwICMgMTBLQgo="}}),e._v(" "),n("ul",[n("li",[n("code",[e._v("mempool.recheck")])])]),e._v(" "),n("p",[e._v("After every block, Tendermint rechecks every transaction left in the\nmempool to see if transactions committed in that block affected the\napplication state, so some of the transactions left may become invalid.\nIf that does not apply to your application, you can disable it by\nsetting "),n("code",[e._v("mempool.recheck=false")]),e._v(".")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("mempool.broadcast")])])]),e._v(" "),n("p",[e._v("Setting this to false will stop the mempool from relaying transactions\nto other peers until they are included in a block. It means only the\npeer you send the tx to will see it until it is included in a block.")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("consensus.skip_timeout_commit")])])]),e._v(" "),n("p",[e._v("We want "),n("code",[e._v("skip_timeout_commit=false")]),e._v(" when there is economics on the line\nbecause proposers should wait to hear for more votes. But if you don't\ncare about that and want the fastest consensus, you can skip it. It will\nbe kept false by default for public deployments (e.g. "),n("a",{attrs:{href:"https://cosmos.network/intro/hub",target:"_blank",rel:"noopener noreferrer"}},[e._v("Cosmos\nHub"),n("OutboundLink")],1),e._v(") while for enterprise\napplications, setting it to true is not a problem.")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("consensus.peer_gossip_sleep_duration")])])]),e._v(" "),n("p",[e._v("You can try to reduce the time your node sleeps before checking if\ntheres something to send its peers.")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("consensus.timeout_commit")])])]),e._v(" "),n("p",[e._v("You can also try lowering "),n("code",[e._v("timeout_commit")]),e._v(" (time we sleep before\nproposing the next block).")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("p2p.addr_book_strict")])])]),e._v(" "),n("p",[e._v("By default, Tendermint checks whenever a peer's address is routable before\nsaving it to the address book. The address is considered as routable if the IP\nis "),n("a",{attrs:{href:"https://github.com/tendermint/tendermint/blob/27bd1deabe4ba6a2d9b463b8f3e3f1e31b993e61/p2p/netaddress.go#L209",target:"_blank",rel:"noopener noreferrer"}},[e._v("valid and within allowed\nranges"),n("OutboundLink")],1),e._v(".")]),e._v(" "),n("p",[e._v("This may not be the case for private or local networks, where your IP range is usually\nstrictly limited and private. If that case, you need to set "),n("code",[e._v("addr_book_strict")]),e._v("\nto "),n("code",[e._v("false")]),e._v(" (turn it off).")]),e._v(" "),n("ul",[n("li",[n("code",[e._v("rpc.max_open_connections")])])]),e._v(" "),n("p",[e._v("By default, the number of simultaneous connections is limited because most OS\ngive you limited number of file descriptors.")]),e._v(" "),n("p",[e._v("If you want to accept greater number of connections, you will need to increase\nthese limits.")]),e._v(" "),n("p",[n("a",{attrs:{href:"https://github.com/satori-com/tcpkali/blob/master/doc/tcpkali.man.md#sysctls-to-tune-the-system-to-be-able-to-open-more-connections",target:"_blank",rel:"noopener noreferrer"}},[e._v("Sysctls to tune the system to be able to open more connections"),n("OutboundLink")],1)]),e._v(" "),n("p",[e._v("...for N connections, such as 50k:")]),e._v(" "),n("tm-code-block",{staticClass:"codeblock",attrs:{language:"",base64:"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"}}),e._v(" "),n("p",[e._v("The similar option exists for limiting the number of gRPC connections -\n"),n("code",[e._v("rpc.grpc_max_open_connections")]),e._v(".")])],1)}),[],!1,null,null,null);t.default=a.exports}}]);