mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
245 lines
9.3 KiB
Text
245 lines
9.3 KiB
Text
![]() |
#
|
||
|
# IP Virtual Server configuration
|
||
|
#
|
||
|
menu "IP: Virtual Server Configuration"
|
||
|
depends on INET && NETFILTER
|
||
|
|
||
|
config IP_VS
|
||
|
tristate "IP virtual server support (EXPERIMENTAL)"
|
||
|
depends on INET && NETFILTER
|
||
|
---help---
|
||
|
IP Virtual Server support will let you build a high-performance
|
||
|
virtual server based on cluster of two or more real servers. This
|
||
|
option must be enabled for at least one of the clustered computers
|
||
|
that will take care of intercepting incoming connections to a
|
||
|
single IP address and scheduling them to real servers.
|
||
|
|
||
|
Three request dispatching techniques are implemented, they are
|
||
|
virtual server via NAT, virtual server via tunneling and virtual
|
||
|
server via direct routing. The several scheduling algorithms can
|
||
|
be used to choose which server the connection is directed to,
|
||
|
thus load balancing can be achieved among the servers. For more
|
||
|
information and its administration program, please visit the
|
||
|
following URL: <http://www.linuxvirtualserver.org/>.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_DEBUG
|
||
|
bool "IP virtual server debugging"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
Say Y here if you want to get additional messages useful in
|
||
|
debugging the IP virtual server code. You can change the debug
|
||
|
level in /proc/sys/net/ipv4/vs/debug_level
|
||
|
|
||
|
config IP_VS_TAB_BITS
|
||
|
int "IPVS connection table size (the Nth power of 2)"
|
||
|
depends on IP_VS
|
||
|
default "12"
|
||
|
---help---
|
||
|
The IPVS connection hash table uses the chaining scheme to handle
|
||
|
hash collisions. Using a big IPVS connection hash table will greatly
|
||
|
reduce conflicts when there are hundreds of thousands of connections
|
||
|
in the hash table.
|
||
|
|
||
|
Note the table size must be power of 2. The table size will be the
|
||
|
value of 2 to the your input number power. The number to choose is
|
||
|
from 8 to 20, the default number is 12, which means the table size
|
||
|
is 4096. Don't input the number too small, otherwise you will lose
|
||
|
performance on it. You can adapt the table size yourself, according
|
||
|
to your virtual server application. It is good to set the table size
|
||
|
not far less than the number of connections per second multiplying
|
||
|
average lasting time of connection in the table. For example, your
|
||
|
virtual server gets 200 connections per second, the connection lasts
|
||
|
for 200 seconds in average in the connection table, the table size
|
||
|
should be not far less than 200x200, it is good to set the table
|
||
|
size 32768 (2**15).
|
||
|
|
||
|
Another note that each connection occupies 128 bytes effectively and
|
||
|
each hash entry uses 8 bytes, so you can estimate how much memory is
|
||
|
needed for your box.
|
||
|
|
||
|
comment "IPVS transport protocol load balancing support"
|
||
|
depends on IP_VS
|
||
|
|
||
|
config IP_VS_PROTO_TCP
|
||
|
bool "TCP load balancing support"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
This option enables support for load balancing TCP transport
|
||
|
protocol. Say Y if unsure.
|
||
|
|
||
|
config IP_VS_PROTO_UDP
|
||
|
bool "UDP load balancing support"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
This option enables support for load balancing UDP transport
|
||
|
protocol. Say Y if unsure.
|
||
|
|
||
|
config IP_VS_PROTO_ESP
|
||
|
bool "ESP load balancing support"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
This option enables support for load balancing ESP (Encapsultion
|
||
|
Security Payload) transport protocol. Say Y if unsure.
|
||
|
|
||
|
config IP_VS_PROTO_AH
|
||
|
bool "AH load balancing support"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
This option enables support for load balancing AH (Authentication
|
||
|
Header) transport protocol. Say Y if unsure.
|
||
|
|
||
|
comment "IPVS scheduler"
|
||
|
depends on IP_VS
|
||
|
|
||
|
config IP_VS_RR
|
||
|
tristate "round-robin scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The robin-robin scheduling algorithm simply directs network
|
||
|
connections to different real servers in a round-robin manner.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_WRR
|
||
|
tristate "weighted round-robin scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The weighted robin-robin scheduling algorithm directs network
|
||
|
connections to different real servers based on server weights
|
||
|
in a round-robin manner. Servers with higher weights receive
|
||
|
new connections first than those with less weights, and servers
|
||
|
with higher weights get more connections than those with less
|
||
|
weights and servers with equal weights get equal connections.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_LC
|
||
|
tristate "least-connection scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The least-connection scheduling algorithm directs network
|
||
|
connections to the server with the least number of active
|
||
|
connections.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_WLC
|
||
|
tristate "weighted least-connection scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The weighted least-connection scheduling algorithm directs network
|
||
|
connections to the server with the least active connections
|
||
|
normalized by the server weight.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_LBLC
|
||
|
tristate "locality-based least-connection scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The locality-based least-connection scheduling algorithm is for
|
||
|
destination IP load balancing. It is usually used in cache cluster.
|
||
|
This algorithm usually directs packet destined for an IP address to
|
||
|
its server if the server is alive and under load. If the server is
|
||
|
overloaded (its active connection numbers is larger than its weight)
|
||
|
and there is a server in its half load, then allocate the weighted
|
||
|
least-connection server to this IP address.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_LBLCR
|
||
|
tristate "locality-based least-connection with replication scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The locality-based least-connection with replication scheduling
|
||
|
algorithm is also for destination IP load balancing. It is
|
||
|
usually used in cache cluster. It differs from the LBLC scheduling
|
||
|
as follows: the load balancer maintains mappings from a target
|
||
|
to a set of server nodes that can serve the target. Requests for
|
||
|
a target are assigned to the least-connection node in the target's
|
||
|
server set. If all the node in the server set are over loaded,
|
||
|
it picks up a least-connection node in the cluster and adds it
|
||
|
in the sever set for the target. If the server set has not been
|
||
|
modified for the specified time, the most loaded node is removed
|
||
|
from the server set, in order to avoid high degree of replication.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_DH
|
||
|
tristate "destination hashing scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The destination hashing scheduling algorithm assigns network
|
||
|
connections to the servers through looking up a statically assigned
|
||
|
hash table by their destination IP addresses.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_SH
|
||
|
tristate "source hashing scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The source hashing scheduling algorithm assigns network
|
||
|
connections to the servers through looking up a statically assigned
|
||
|
hash table by their source IP addresses.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_SED
|
||
|
tristate "shortest expected delay scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The shortest expected delay scheduling algorithm assigns network
|
||
|
connections to the server with the shortest expected delay. The
|
||
|
expected delay that the job will experience is (Ci + 1) / Ui if
|
||
|
sent to the ith server, in which Ci is the number of connections
|
||
|
on the the ith server and Ui is the fixed service rate (weight)
|
||
|
of the ith server.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
config IP_VS_NQ
|
||
|
tristate "never queue scheduling"
|
||
|
depends on IP_VS
|
||
|
---help---
|
||
|
The never queue scheduling algorithm adopts a two-speed model.
|
||
|
When there is an idle server available, the job will be sent to
|
||
|
the idle server, instead of waiting for a fast one. When there
|
||
|
is no idle server available, the job will be sent to the server
|
||
|
that minimize its expected delay (The Shortest Expected Delay
|
||
|
scheduling algorithm).
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
comment 'IPVS application helper'
|
||
|
depends on IP_VS
|
||
|
|
||
|
config IP_VS_FTP
|
||
|
tristate "FTP protocol helper"
|
||
|
depends on IP_VS && IP_VS_PROTO_TCP
|
||
|
---help---
|
||
|
FTP is a protocol that transfers IP address and/or port number in
|
||
|
the payload. In the virtual server via Network Address Translation,
|
||
|
the IP address and port number of real servers cannot be sent to
|
||
|
clients in ftp connections directly, so FTP protocol helper is
|
||
|
required for tracking the connection and mangling it back to that of
|
||
|
virtual service.
|
||
|
|
||
|
If you want to compile it in kernel, say Y. To compile it as a
|
||
|
module, choose M here. If unsure, say N.
|
||
|
|
||
|
endmenu
|