Medium-long term wish list - updated 2019/06/15

Legend: '+' = done, '-' = todo, '*' = done except doc

2.1 or later :

- return-html code xxx [ file "xxx" | text "xxx" ] if <acl>

- return-raw [ file "xxx" | text "xxx" ] if <acl>

- have multi-criteria analysers which subscribe to req flags, rsp flags, and

stream interface changes. This would result in a single analyser to wait

for the end of data transfer in HTTP.

- make it possible to condition a timeout on an ACL (dynamic timeouts)

- forwardfor/originalto except with IPv6

- tcp-request session expect-proxy {L4|L5} if ...

- wait on resource (time, mem, CPU, socket, server's conn, server's rate, ...)

- bandwidth limits

- buddy servers to build defined lists of failovers. Detect loops during

the config check.

server XXX buddy YYY

server YYY # may replace XXX when XXX fails

- spare servers : servers which are used in LB only when a minimum farm

weight threshold is not satisfied anymore. Useful for inter-site LB with

local pref by default.

- add support for event-triggered epoll, and maybe change all events handling

to pass through an event cache to handle temporarily disabled events.

- evaluate the changes required for multi-process+shared mem or multi-thread

+thread-local+fast locking.

Old, maybe obsolete points :

- clarify licence by adding a 'MODULE_LICENCE("GPL")' or something equivalent.

- 3 memory models : failsafe (prealloc), normal (current), optimal (alloc on

demand)

- verify if it would be worth implementing an epoll_ctl_batch() for Linux

- option minservers XXX : activates some spare servers when active servers

are insufficient

- initcwnd parameter for bind sockets : needed in kernel first

- have a callback function which would be called after a server is selected,

for header post-processing. That would be mainly used to remove then add

the server's name or cookie in a header so that the server knows it.

Unsorted :

- internal socket for "server XXX frontend:name"

- XML inspection (content-switching for SOAP requests)

- random cookie generator

- fastcgi to servers

- hot config reload

- RHI - BGP

- telnet/SSH cli

- dynamic memory allocation

- dynamic weights based on check response headers and traffic response time

- various kernel-level acceleration (multi-accept, ssplice, epoll2...)