Twemproxy Flow charsyam@naver.com

Twemproxy • Server Side Proxy For Memcache, Redis

• Made by Twitter.

• Github.com/twitter/twemproxy

Recv Loop(common)

core_loop

core_core

core_recv

msg_recv

Recv Loop(client-server)

Send Loop(common)

core_loop

core_core

core_send

msg_send

Send Loop(client-server)

Message • Using Memory Pool

• Using mbuf

Message-req_get

req_get

msg_get

rsp_get

_msg_get

Processing ……

req_put rsp_put

mbuf • Using chained buffer

• Using sendv, writev

mbuf

struct iovec array[]

Mbuf->pos array[0].iov_base

array[0].iov_len mlen

Mbuf->pos array[n].iov_base

array[n].iov_len mlen

mbuf

Why is Twemproxy Fast? • Using mbuf and avoiding buffer copy.

– Just forward packet.

Thank you