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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/ipv4/ipvs/Kconfig
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+#
+# 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