NCA配置文档！！！Unix系统 -电脑资料

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下面的文档是从sun的网站上当下来的，

NCA配置文档！！！Unix系统

。只要做很少的改动就可以配置成功。 SystemRequirementsforSolarisNCA TosupportSolarisNCA,thesystemmustmeettheserequirements: #8226;256-MbytesRAM #8226;Solaris8OE,update7/01orlater InstallationandConfiguration

下面的文档是从sun的网站上当下来的。只要做很少的改动就可以配置成功。

System Requirements for Solaris NCA

To support Solaris NCA, the system must meet these requirements:

• 256-Mbytes RAM

• Solaris 8 OE, update 7/01 or later

Installation and Configuration

Libraries

If a Web server does not use a native Solaris NCA sockets interface (that is, a socket of type

AF_NCA/PF_NCA,ncad_addr.so), it can be preloaded. Add a line such as LD_PRELOAD=/

usr/lib/ncad_addr.so/usr/sbin/httpd （这个地方要改成你装的apache的目录的bin下的httpd例如/usr/local/apache/bin/httpd） in the Web server startup script.

How to Configure Web Servers to Use Solaris NCA

1) Register the interfaces

Enter the names of each of the physical interfaces in the /etc/nca/nca.if file

(See the nca.if(4) man page for more information).

# cat /etc/nca/nca.if

hme0

hme1

For each interface, there must be an aclearcase/" target="_blank" >ccompanying hostname.interface-name file and an

entry in /etc/hosts file for the contents of hostname.interface-name. To bring up the Solaris

NCA feature on all interfaces, place an asterisk (*) in the nca.if file.

2) Enable the ncakmod kernel module

Change the status entry in /etc/nca/ncakmod.conf to enabled.

# cat /etc/nca/ncakmod.conf

# NCA Kernel Module Configuration File

status=enabled

httpd_door_path=/var/run/nca_httpd_1.door

ncad_status=disabled

nca_active=disabled

See the ncakmod.conf(4) man page for more information.

3) Enable NCA logging

Change the status entry in /etc/nca/ncalogd.conf to enabled.

# cat /etc/nca/ncalogd.conf

# NCA Logging Configuration File

status=enabled

logd_path_name="/var/nca/log"

logd_file_size=1000000

The location of the log file can be changed by changing the path indicted by the

logd_path_name entry. See the ncalogd.conf(4) man page for more information.

How to Disable Caching of Web Pages

1) Disable the ncakmod kernel module

Change the status entry in /etc/nca/ncakmod.conf to disabled.

# cat /etc/nca/ncakmod.conf

# NCA Kernel Module Configuration File

status=disabled

httpd_door_path=/var/run/nca_httpd_1.door

ncad_status=disabled

nca_active=disabled

See the ncakmod.conf(4) man page for more information.

2) Disable NCA logging

Change the status entry in /etc/nca/ncalogd.conf to disabled.

# cat /etc/nca/ncalogd.conf

# NCA Logging Configuration File

status=disabled

logd_path_name="/var/nca/log"

logd_file_size=1000000

See the ncalogd.conf(4) man page for more information.

3) Reboot the server

How to Enable or Disable Solaris NCA Logging

Solaris NCA logging can be turned on or off as needed once the program is enabled. (See “How to

Enable Caching of Web Pages” for more information.)

1) Change Solaris NCA logging

To permanently disable logging, the status in /etc/nca/ ncalogd.conf to disabled must be

changed, and the system rebooted. See the ncalogd.conf(4) man page for more information.

To stop logging

Type the following command:（下面这两步最好是你完成整个配置后在运行，否则会出错！）

# /etc/init.d/ncalogd stop

To start logging

Type the following command:

# /etc/init.d/ncalogd start

2) How to Load the Solaris NCA Socket Utility Library

Follow this process only if the Web server does not provide native support of the AF_NCA socket.

Add a line to the Web server startup script that causes the library to be preloaded. The line

should look something like this:

LD_PRELOAD=/usr/lib/ncad_addr.so /usr/bin/httpd（上面已经说了。这要改！）

Tuning Solaris NCA for Maximum Performance

Tuning Solaris NCA for maximum performance is recommended only if the Web server software

runs on a dedicated Web server machine. This tuning allocates more memory for caching the

pages. The variables should be set in /etc/system.

nca:nca_conn_hash_size

Controls the hash table size in the Solaris NCA module for all TCP connections.

Adjusted to nearest prime number.

minimum: 0

maximum: 201326557

default: 383

When to Change:

This should be changed when the Solaris NCA TCP hash table is too small to keep track of the

incoming TCP connections, many TCP connections are grouped together in the same hash table

entry. This situation is indicated when Solaris NCA is receiving many TCP connections and performance

is decreasing.

nca:nca_conn_req_max_q

The maximum number of pending TCP connections for Solaris NCA to listen on.

minimum: 0

maximum: 4,294,967,295

default: 256

When to Change:

This should be changed when Solaris NCA closes a connection immediately after it is established

because it already has too many established TCP connections. If Solaris NCA is receiving many TCP

connections and can handle a larger load, but is refusing additional connections, increase this

parameter to allow it to handle more simultaneous TCP connections.

nca:nca_conn_req_max_q0

The maximum number of incomplete (three-way handshake not yet finished) pending TCP connections

for Solaris NCA to listen on.

minimum: 0

maximum: 4,294,967,295

default: 1024

When to Change:

This should be changed when Solaris NCA refuses to accept more TCP connections because it

already has too many pending TCP connections. If Solaris NCA is receiving many TCP connections

and can handle a larger load, but is refusing additional connections, increase this parameter to

allow Solaris NCA to handle more simultaneous TCP connections.

nca:nca_ppmax

Maximum amount of physical memory (in pages) used by Solaris NCA for caching the pages.

Should not be more than 75 percent of total memory.

minimum: 1% of physical memory

maximum: limited by amount of physical memory

default: 25% of physical memory

When to Change:

This should be changed when using Solaris NCA on a system with a great deal of memory (more

than 512 MB). If a system has physical memory that is not being used, increase this parameter so

that Solaris NCA will efficiently use memory to cache new objects and increase the system’s performance.

nca_ppmax should be increased in conjunction with nca_vpmax, unless the system has

more physical memory than virtual memory (a 32-bit kernel having greater than four gigabytes of

memory). Use pagesize(1) to get the page size on the system.

nca:nca_vpmax

Maximum amount of virtual memory (in pages) used by Solaris NCA for caching pages. Should not

be more than 75 percent of the total memory.

minimum: 1% of virtual memory

maximum: limited by amount of virtual memory

default: 25% of virtual memory

When to Change:

This should be changed when using Solaris NCA on a system with a great deal of memory (more

than 512 MB). If a kernel has virtual memory that is not being used, increase this parameter so

that Solaris NCA willefficiently use memory to cache new objects and increase the system’s performance.

This should be increased in conjunction with nca_ppmax and should be approximately the

same as nca_vpmax, unless the system has more physical memory than virtual memory.

General System Tuning

Apart from Solaris NCA tuning, general system tuning can also improve performance. When using

Sun Gigabit Ethernet cards, set it in interrupt mode for better results.

sq_max_size

The depth of the syncq(number of messages) before a destination streams queue generates a

QFULL.

minimum: 1

maximum: 0 (unlimited)

default: 2

When to Change:

When Solaris NCA is running on a system with a great dealof memory, increase this parameter to

allow drivers to queue more packets of data. If a server is under heavy load, increase this parameter

so that modules and drivers may process more data without dropping packets or becoming

backlogged.

ge:ge_intr_mode

Enable the GE driver to send packets directly to the upper communication layers rather than

queueing.

minimum: 0

maximum: 1

default: 0 (Queue packets to upper layers)

When to Change:

When Solaris NCA is enabled, set this parameter to 1, so that the packet is delivered in interrupt

mode for faster processing.

For example, a system with four gigabytes of memory and booted under 64-bit kernel should

have the following setting in /etc/system. (Note: pagesize(1) can be used.)

下面的配置可以跟自己的机器的配置来设定！！！

set sq_max_size=0

set ge:ge_intr_mode=1

set nca:nca_conn_hash_size=82500

set nca:nca_conn_req_max_q=100000

set nca:nca_conn_req_max_q0=100000

set nca:nca_ppmax=393216

set nca:nca_vpmax=393216

P10 Performance Data

Chapter 4

Performance Data

Independently published results show that the performance of a commercial Web server on a

900-Mhz Sun Fire™ 280R with the Solaris NCA is 73 percent better than a one-gigahertz Intel-based

Hewlet Packard system withLinuxthat is running the same commercial Web server. Both of these

systems were tested without the LSO network interface cards (NIC). These results are posted at:

http://www.spec.org/osg/web99/results/web99.html.

Conclusion P11

Chapter 5

Conclusion

The Solaris NCA can improve the performance of most popular Web servers, making it easier to

efficiently manage resources and provide a higher level of service. It allows service providers to

manage Web services across a heterogeneous network, without having to port to multiple Web

servers. Solaris NCA also reduces the number of systems required to do a particular task, enabling

better utilization of existing resources and resulting in lower cost of ownership.

P12 References

Chapter 6

References

The following sections cover the files and components that are need to use Solaris NCA. Also,

specifics about how Solaris NCA interacts with the Web server are included.

1. /etc/hostname.* Lists all physical interfaces configured on the server.

2. /etc/hosts Lists all host names associated with the server. Entries in this file must match

with entries in /etc/hostname.* files for Solaris NCA to function.

3. /etc/init.d/ncad Solaris NCA door server startup script run when a server is booted.

4. /etc/init.d/ncakmod Solaris NCA server startup script run when a server is booted.

5. /etc/init.d/ncalogd Solaris NCA logging startup script run when a server is booted.

6. /etc/nca/nca.if Lists the interfaces on which Solaris NCA is run

(see the nca.if(4) man page).

7. /etc/nca/ncakmod.conf Lists configuration parameters for Solaris NCA (see the

ncakmod.conf(4) man page).

8. /etc/nca/ncalogd.conf Lists configuration parameters for Solaris NCA logging (see

the ncalogd.conf(4) man page).

9. /usr/bin/ncab2clf Command used to convert data in the log file to Common Log File

format (see the ncab2clf(1) man page).

10./usr/lib/net/ncaconfd Command used to configure Solaris NCA to run on multiple

interfaces during boot (see the ncaconfd (1M) man page).

11./var/nca/log Holds log file data; in binary format, so do not edit this file.

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ultra-guest 回复于：2002-06-19 16:22:44NCA主要是干吗用的？简单介绍一下，

电脑资料

《NCA配置文档！！！Unix系统》(https://www.unjs.com)。

boycw 回复于：2002-06-19 16:27:41NCA就是网络缓存加速器（Network Cache Accelerator：NCA）：可以将基于Socket的WWW服务器的性能最大提高到5倍左右。同时可以简化服务器的管理

ultra-guest 回复于：2002-06-19 16:42:45听起来真不错，我要做试验该事先准备些甚么？我就一台机器，一根网线。

没问题吗？

Fun-FreeBSD 回复于：2002-09-02 17:25:37好东东

可惜没机会用

我顶

zufuqing5303 回复于：2002-10-15 14:17:51看得我头晕目眩

原文转自：http://www.ltesting.net

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