At a Glance

Catalog

System_ms

Category

Web Servers

User volumes

no

Min. memory

2.062 GB (x86), 6.062 GB (x64)

OS

Windows

Constraints

no

Questions/Comments

IIS03yx8, IIS08yx8

Name

Latest Version

OS

IIS

VB

ASP.NET

Notes

IIS03Wx8

1.0.6-1

Windows Server 2003 "Web" SP2 (x86)

6

6

3.5 SP1

- 

IIS03Sx8

1.0.6-1

Windows Server 2003 "Standard" SP2 (x64)

6

6

3.5 SP1

- 

IIS03Ex8

1.0.6-1

Windows Server 2003 "Enterprise" SP2 (x64)

6

6

3.5 SP1

- 

IIS03DCx8

1.0.6-1

Windows Server 2003 "Datacenter" SP2 (x64)

6

6

3.5 SP1

- 

IIS08Wx4

1.0.6-1

Windows Server 2008 "Web" R2 (x64)

7.5

6

4.0

-

IIS08Sx4

1.0.6-1

Windows Server 2008 "Standard" R2 (x64)

7.5

6

4.0

-

IIS08Ex4

1.0.6-1

Windows Server 2008 "Enterprise" R2 (x64)

7.5

6

4.0

-

IIS08DCx4

1.0.6-1

Windows Server 2008 "Datacenter" R2 (x64)

7.5

6

4.0

-

Resource

Minimum

Web (x86) Maximum

Default

Tested

CPU

0.9

32

2.4

8

Memory

2.062 GB

48 GB

4.25 GB

32 GB

Bandwidth

9 Mbps

18 Gbps

1.6 Gbps

2 Gbps

Resource

Minimum

Standard (x64) Maximum

Enterprise (x64) Maximum

Datacenter (x64) Maximum

Default

Tested

CPU

2.1

48

80

272

2.4

8

Memory

6.062 GB

288 GB

544 GB

544 GB

6.25 GB

32G

Bandwidth

9 Mbps

18 Gbps

18 Gbps

18 Gbps

1.6 Gbps

2 Gbps

Resource

Minimum

Web (x64) Maximum

Standard (x64) Maximum

Enterprise (x64) Maximum

Datacenter (x64) Maximum

Default

CPU

2.1

48

48

80

272

2.4

Memory

6.062 GB

288 GB

288 GB

544 GB

544 GB

6.25 GB

Bandwidth

9 Mbps

18 Gbps

18 Gbps

18 Gbps

18 Gbps

1.6 Gbps

Name

Direction

Protocol

Description

in

in

HTTP

Serves HTTP requests coming from web clients. Serves the HTTP/1.1 and 1.0 protocols.

ctl

in

HTTP

Control terminal that is used for enabling/disabling the outputs and retrieving output terminal state from load-balancer.

ui

in

HTTP

Exposes a Web UI that contains load-balancer runtime statistics.

db

out

Any

Access to a database server. Usage is defined by whatever scripts reside on the content volume (if any). This terminal may be left unconnected if it is not used.

fs

out

CIFS

Access to a network file system for shared file storage, providing anonymous logins and a read/write share named share. Usage is defined by whatever scripts reside on the content volume (if any). Software on the content volume 'sees' the remote file system as \\fs\share in the appliance's filesystem space. This terminal must be connected.

log

out

CIFS

Access to a CIFS-based network file system for storing IIS logs. The connected server must allow anonymous logins and have a read-write share named share. This terminal may be left unconnected if it is not used.

aux

out

Any

Access to an SMTP server for sending outgoing e-mail. Usage is defined by whatever scripts reside on the content volume (if any). Note that 'IIS SMTP' is not configured on the appliance; any application that needs to send mail should simply use SMTP directly, using 'aux' as the target hostname.
This terminal may be left unconnected if it is not used.

net

out

Any

Gateway output for subnet access.
This terminal may be left unconnected if it is not used.

mon

out

CCE

Sends performance and resource usage statistics.
This terminal may be left unconnected if it is not used.

Property name

Type

Description

docs_dir

String

Root directory on the remote NAS volume where the documents to be served are located. For example, it may be mydocs. If docs_dir is set to the empty string, the root directory of the content volume is used.
Important! The directory must be pre-existing on the content volume.
Default: (empty)

logs_enabled

String

Controls whether IIS logging is enabled. Allowed values are on and off. If set to on and the log terminal is connected, then logs will be stored on the remote NAS appliance, on the cifs share. If set to on and the log terminal is not connected, then logs will be stored on the Windows boot drive, in the default location (C:\WINDOWS\system32\LogFiles\W3SVC1\*). If this is set to off, logs are completely disabled. Default: off

srv2_standby

Integer

Specifies whether the second IIS0Ny server is in standby mode. If non-zero, the second IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv3_standby

Integer

Specifies whether the third IIS0Ny server is in standby mode. If non-zero, the third IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv4_standby

Integer

Specifies whether the fourth IIS0Ny server is in standby mode. If non-zero, the fourth IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv5_standby

Integer

Specifies whether the fourth IIS0Ny server is in standby mode. If non-zero, the fifth IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv6_standby

Integer

Specifies whether the fourth IIS0Ny server is in standby mode. If non-zero, the sixth IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv7_standby

Integer

Specifies whether the fourth IIS0Ny server is in standby mode. If non-zero, the seventh IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

srv8_standby

Integer

Specifies whether the fourth IIS0Ny server is in standby mode. If non-zero, the eighth IIS0Ny server is in standby mode, otherwise it is not in standby mode.
Default: 1

Property name

Type

Description

lb_mode

String

Specifies the mode of operation and a way to use the named session cookie for session identification. Valid values are:
passive - the cookie is not modified. It is expected that a given cookie value is always unique and the same value is never used by another server.
synch - the cookie string in the HTTP response from a server is modified to make it unique to the terminal from which the response came (by adding a 4-character terminal ID into the cookie value). The 'terminal ID' is stripped before a request is forwarded to a server on one of the outX terminals. Other than inserting the terminal ID, the mapping between cookie values and output terminals is the same as for passive - that is, the entire cookie value is compared.
insert - the load balancer itself inserts a cookie into responses sent back to the client on in , so when the client sends subsequent requests with that cookie, they are directed to the same server as the first request from that client. The cookie inserted by HALB is without an expiration date, meaning that it is not to be permanently saved by the client software.
source - The source IP address of the request is used to bind the session to a particular backend web server. The cookie property is ignored.
Default: passive.

lb_cookie_name

String

The name of the cookie used to identify a session. For the passive modes ( passive and synch - see the mode property below), this is the name of the cookie used by the back-end servers connected to out1 - out8 to identify client sessions. For the insert mode, this is the name of the cookie that HALB should insert into HTTP responses to make each client 'stick' with a single server. If this property is set to the empty value, no session tracking is done and all requests are distributed in a simple round-robin fashion. Ignored for the source mode.
Default: (empty).

lb_cookie_check_length

Int

Defines how many bytes from the value of cookie are used as unique key in passive mode of operation to match session to backend web server. Default value of 10 is usually sufficient for all common PHP and java applications. This value must always be equal or less than the length of the cookie value.
Default: 10.

lb_max_connections

integer

The maximum number of concurrently active connections that the load balancer handles. When this number is reached, new connections are still accepted, but their processing is delayed until another connection is closed. Upon start, load-balancer automatically determines the maximum number of connections based upon available memory, compares it to the value of this property and uses the lowest value. If this property equals 0 then the computed value is used. Note that neither the available memory nor an explicit setting of this property have a direct effect on the balancer's throughput or its maximum request rate - setting a low number (or having little memory) affects response only if the back-end servers are performing lengthy operations for each request (for example, database searches), causing many requests to remain open at the same time.
Default: 0

lb_backup_outputs

String

A space or comma delimited list of outputs ( out1 - out8 ) that are considered backups. Traffic is directed to the backup servers only if all backend servers are unavailable. The purpose of these backup servers is to notify clients that something is wrong or redirect them, instead of throwing errors from unavailable backend or timing out.
Default: (empty).

lb_healthcheck_url

String

The URL used to perform the health check of the backend web servers in http_get and http_head health check methods. May be specified as a complete URL (http://host.name/file/to/check/for.php) or as a relative path (/file/to/check/for.php). If specified as a URL, HALB uses the HTTP/1.1 protocol while performing the health checks using the hostname extracted from UR, in a "Host:" header. This allows usage of virtual hosts. If specified as a relative path, HALB uses the HTTP/1.0 protocol and checks for the document specified by this property. If this property is empty, load-balancer checks for the default root '/' using the HTTP/1.0 protocol.
Default: (empty).

lb_healthcheck_agent

String

The string used as an agent identifier for http_get and http_head health check methods. If empty, "HALB-health-check" is used.
Default: (empty).

lb_healthcheck_method

String

The method used for the health check of the backend web servers.
tcp_connect - load-balancer connects to port 80 of the web server. If the connection is successfully established, load-balancer assumes that the web server is functional. This is the fastest method and requires the least resources.
http_head - load-balancer uses the HEAD method to request the document specified by the lb_healthcheck_url property. This is slower than tcp_connect, requires more resources on both load-balancer and web servers, but is more reliable. A status code of 2xx or 3xx, received from a web server, validates the server as operational.
http_get - load-balancer uses the GET method to request the document specified by the lb_healthcheck_url property. This is the slowest method that requires most resources but is most reliable.A status code of 2xx or 3xx, received from a web server, validates the server as operational. If the lb_healthcheck_regexp property is defined, then load-balancer downloads the document including all HTTP headers and server status code, and check for matches with the lb_healthcheck_regexp value. If match is found, then the backend server is considered functional, or is disabled if no matches were found.
Default: tcp_connect.

lb_healthcheck_regexp

String

A test string used with the http_get health check mode. Short or common values (eg. "OK") will likely cause false positive matches. This string is a Perl regular expression.
Default: (empty).

lb_healthcheck_interval

Int

Interval between health checks of the backend web servers (specified in seconds).
Default: 20 seconds.

lb_timeout

integer

Timeout in seconds to expire inactive sessions. If set to zero, inactive sessions do not expire. If set to a non-zero value, inactive sessions resumed after timeout seconds are considered stale, and requests bearing the 'forgotten' cookie are treated as if they have no cookie at all and are directed to a random server, using the usual round-robin method. This property is only valid for passive mode and ignored for all other modes.
Default: 0

lb_client_timeout

Int

Timeout in seconds for waiting for a request from a client after establishing the connection.
Default: 150.

lb_server_timeout

Int

Timeout in seconds for waiting for a reply from a backend web server after establishing the connection.
Default: 150.

lb_conn_timeout

Int

Timeout in seconds for establishing any tcp connection. This includes the health checks. Extra attention must be paid to this setting, because if under high load the health checks time out because of unsufficiently small value, load-balancer starts to disable outputs. It is not recommended to set it lower than 20 seconds.
Default: 20.

lb_username

String

Username for accessing the load-balancer GUI through the ui terminal. If empty, there is no authentication.
Default: (empty).

lb_password

String

Password for accessing the load-balancer GUI through the ui terminal. Password is ignored if username is empty.
Default: (empty).

lb_ctl_port

Int

Port that is used to access the web service control interface through the ctl terminal.
Default: 80.

lb_ui_port

Int

Port that is used to access the load-balancer runtime statistics GUI through the ui terminal.
Default: 80.

index_files

String

Ordered, space separated list of files to use as a directory index page in case the client requests a URL that refers to a directory name.
Default: default.htm default.asp default.aspx index.html

max_connections

Integer

Maximum number of concurrent active connections that each IIS node can handle. The actual number of concurrent connections may be limited to less than the value set for this property if there is not enough system memory. See the Memory Usage section.
Default: (empty)

idle_timeout_sec

Integer

Timeout, in seconds, for keeping a client connection open if there is no request or response going through. Keeping this timeout short helps drop forgotten connections quickly. Default: 15

data_timeout_sec

Integer

Timeout, in seconds, for receiving or sending more data if a data transfer has started but is not completed. This timeout allows IIS03y to drop connections that have been forgotten while still allowing delays during the transfer. Default: 300