![]() ![]() The configuration file is used to specify the server pools and the servers within each pool that twemproxy manages. Twemproxy can be configured through a YAML file specified by the -c or -conf-file command-line argument on process start. ![]() When twemproxy is meant to handle a large number of concurrent client connections, you should set chunk size to a small value like 512 bytes using the -m or -mbuf-size=N argument. However, with a large mbuf size, every active connection would use up 16K bytes of buffer which might be an issue when twemproxy is handling large number of concurrent connections from clients. A large mbuf size reduces the number of read syscalls made by twemproxy when reading requests or responses. There is a trade-off between the mbuf size and number of concurrent connections twemproxy can support. By default each mbuf chunk is set to 16K bytes in size. This means that once mbuf is allocated, it is not deallocated, but just put back into the reuse pool. Similarly the same mbuf on which a response was received from the server is used for forwarding it to the client.įurthermore, memory for mbufs is managed using a reuse pool. Mbuf enables zero-copy because the same buffer on which a request was received from the client is used for forwarding it to the server. In twemproxy, all the memory for incoming requests and outgoing responses is allocated in mbuf. m, -mbuf-size=N : set size of mbuf chunk in bytes (default: 16384 bytes) p, -pid-file=S : set pid file (default: off) i, -stats-interval=N : set stats aggregation interval in msec (default: 30000 msec) a, -stats-addr=S : set stats monitoring ip (default: 0.0.0.0) s, -stats-port=N : set stats monitoring port (default: 22222) c, -conf-file=S : set configuration file (default: conf/nutcracker.yml) o, -output=S : set logging file (default: stderr) v, -verbose=N : set logging level (default: 5, min: 0, max: 11) D, -describe-stats : print stats description and exit t, -test-conf : test configuration for syntax errors and exit Works with Linux, *BSD, OS X and SmartOS (Solaris).Observability via stats exposed on the stats monitoring port. ![]() Can be configured to disable nodes on failures.Supports multiple hashing modes including consistent hashing and distribution.Easy configuration of server pools through a YAML file.Implements the complete memcached ascii and redis protocol.Shard data automatically across multiple servers.Supports multiple server pools simultaneously.Enables pipelining of requests and responses.Keeps connection count on the backend caching servers low.Maintains persistent server connections.Older Releasesĭistribution tarballs for older twemproxy releases (<= 0.4.1) can be found on Google Drive. configure needs automake and libtool to be installed Use CFLAGS="-O3 -fno-strict-aliasing".Use newer version of gcc (older version of gcc has problems). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |