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Version 5.2 |
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Domains
CommuniGate Pro Server can serve Accounts in its Main Domain, and, optionally, in
multiple Secondary Domains, each with its own set of user Accounts (and other objects such
as Mailing Lists, Groups, and Forwarders).
Every Domain can have one or several Domain Aliases (alternative names). All Domain
names and Domain Aliases should be unique, and they should be registered with the Domain Name System (DNS).
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In many cases, a Domain should not have a separate set of user Accounts,
but should rather be a domain name alias for an already existing CommuniGate Pro Domain.
You may also want to serve some domain names using account mapping and/or Unified Domain-Wide
Accounts.
In all these cases, you do not have to create a new CommuniGate Pro
Domain to serve a domain name.
When a client application connects to your CommuniGate Pro Server, and specifies an
account name, the Server has to detect in which Domain to look for that Account.
See the Access section for the details.
Displaying the Domain List
Use the WebAdmin Interface to view the list of Domains served with your Server.
Open the Domains page in the Users realm.
You should be connected as the Postmaster or any other Server Administrator with the All Users
access right to open the Users realm.
To select Domains by name, type a string into the Filter field, and
click the Display button: only the Domains with names containing the specified
string will be displayed.
Each entry in the Domain list contains the Domain name, the assigned network address (if any),
and the number of Accounts in the Domain. If the Domain is a shared Domain served by a Dynamic Cluster,
the Domain name has the [+] prefix. If the Domain is a Directory-based Domain, its name is displayed with
the [D] prefix.
A list entry also displays the number of currently opened domain accounts, the total number of
times domain accounts have been opened (since the Server last restart), and the
last time any domain account was opened.
Select the Show Aliases option to include Domain Aliases into the list. Each
Domain Alias element contains the link to its "real" Domain object list and
settings pages.
Click a domain name to view the Objects in that domain.
Click the word Settings in the last column to view and update the Domain Settings.
Click the Telephone Numbers (Telnum) link to view all Telnums.
Creating a New Domain
Type a new Domain name into the field on the right side of the Create Domain button.
Click the Create Domain button. When a new Domain is created, its name
appears in the Domain List.
If this Server is a member of a Dynamic Cluster,
the additional Create Dynamic Cluster Domain button appears.
Click that button to create a Domain that will be served with all Cluster members.
The Domain created using the Create Domain button are created as "local" Domains and are served with this Server only.
Specifying Domain Settings
The Main Domain and all Secondary Domains have domain-level settings.
To open the Domain Settings page in your browser, either click the Domain Settings
link in the Domains List, or click the Domain Settings link on
the Domain Object list page.
The Account Log option allows you to specify how the account-level operations
(account open/close, password verifications, mailbox creating/removing,
size updates, etc.) are recorded. Log records created for account-related
events have the ACCOUNT tag.
The Mailbox Log option allows you to specify how the mailbox-level operations
(message storing/removing, message status updating, etc.) are recorded.
Log records created for mailbox-related events have the MAILBOX tag.
Most of Domain Settigs can be set to the default value.
In this case the actual setting value is taken from the global, Server-wide
Default Domain Settings.
When the Domain Settings are modified, click the Update button. The page
should appear again, displaying the Updated marker.
You can click the Objects link to switch to the Domain Object List.
Specifying Default Domain Settings
A Domain setting can have the default value. In this case the actual setting value
is taken from the server-wide Default Domain Settings. You can modify these Default
values by clicking the Domain Defaults link on the Domains (Domain List) page.
The Default Domain Settings page resembles a regular Domain Settings page.
A Dynamic Cluster installation maintains separate
server-wide Default Domain settings for all non-Shared (Local) Domains, and cluster-wide
Default Domain settings for all Shared Domains. In the Cluster environment, the
Default Domain Settings page displays links that allow you to switch between the Server-wide
and Cluster-wide Default Settings.
Multihoming and Dedicated IP Addresses
You should read this chapter only if you plan to support multihoming, if your
system is behind a firewall, or if you have a non-standard Domain Name System setup.
When the Server starts, it detects its own network address(es).
Your Server system is "multihomed" if it has more than one network (IP) address.
If the Server system has several IP addresses, some of them can be assigned
(dedicated) to secondary Domains. Accounts in such domains can be accessed
using any POP, IMAP, or other client application without explicitly specifying the full account name.
The Assigned IP Addresses option allows you to assign network addresses to the
main and secondary domains.
- All Available
- This option can be selected for one Domain only, and it is the
default setting for the Main Domain.
All Server's network addresses not assigned to other Domains are assigned to this Domain.
- Manually Defined
- This option is selected by default for all secondary Domains.
If you want to assign (dedicate) an IP address to this Domain, type the
address into the text field on the right of the pop-up menu. You can specify several IP addresses, separating them with the comma (,) symbol.
Only the Server computer's own addresses are accepted, and all specified
addresses should not be already assigned to any other CommuniGate Pro Domain.
If you select this option and leave the text field blank, the Domain will
not have any IP addressed assigned to it. In this case, to access the Domain
accounts, users should specify the full account name (account@domain)
in their client application settings. See the Access section for
the details.
- by DNS A-Record
- When this option is selected, the Server sends a request to the Domain Name
System and tries to resolve the Domain name. If an A-Record for this CommuniGate Pro Domain is
found in the Domain Name System, the addresses from that record are assigned
to the Domain. The system checks that all addresses retrieved from the A-record
belong to the Server computer and that these addresses have not been already assigned
to any other Domain.
This setting is useful if you have several secondary Domains with dedicated IP
addresses and you want to redistribute the Server addresses from time to time.
Instead of reconfiguring both DNS and Server settings, you may reconfigure the DNS
records only, and the Server will take the updated data from the DNS.
- by DNS MX-Record
- When this option is selected, the Server retrieves the highest-priority
MX record (relay name) for this CommuniGate Pro Domain, and then processes
addresses in the A-record for that relay name.
For each Domain in the Domain List, the assigned network (IP) addresses are displayed.
This can be used to check the DNS and Server setup for systems with multihoming.
Because of setup errors or due to a non-standard network and DNS setup, the Server's
own IP address(es) may be left unassigned to any of the Server domains. Open the
General Settings page to see the list of the Server
own IP addresses. The unassigned addresses are marked in red.
When a client application connects to the Server via an unassigned address and the
full account name is not specified, the Server does not allow the user to log in.
Client IP Addresses
Each Domain can have its own list of Client IP Addresses, which extends the Server-wide or Cluster-wide
Client IP Addresses list for this Domain Account users:
Enabling Services
Each Domain has a set of settings that specify which CommuniGate Pro services can be used with the Domain Accounts:
- Mail
- If this option is disabled, incoming E-mail Messages are not delivered to Domain Accounts. Incoming
messages are suspended in the Local Delivery module queue, and they
are rejected if this option is not re-enabled within the specified period of time.
See the Local Delivery module settings for the details.
If this option is disabled, Domain Accounts cannot compose and submit E-mail Messages.
- Relay
- If this option is disabled, Domain users will not be able to use the
Mobile Users Support features. This option can be useful if
you provide free WebMail Accounts in this Domain and you do not want spammers to use
these Accounts to enable SMTP relaying.
- Signal
- If this option is disabled, incoming Signals sent to Domain Accounts are rejected.
- Mobile
- If this option is disabled, Domain users will not be able to connect to their Accounts
from Internet Addresses not included into the Client Addresses list.
This option can be useful if you provide free Accounts in this Domain and you want Domain users to
connect to those Accounts only from the Internet Addresses your own site provides.
- TLS
- If this option is disabled, secure (SSL/TLS) access to Accounts in this Domain is disabled.
- POP, IMAP, MAPI, AirSync, PWD, XMPP, FTP, ACAP
- If a protocol option is disabled, Accounts in this Domain cannot be opened (authenticated) using that protocol.
- SIP
- If this option is disabled, users of this Domain cannot use the SIP operations that require authentication.
- WebMail
- If this option is disabled, the Domain Accounts cannot be opened using the WebUser
Interface, and the Domain mailing lists cannot be browsed.
- XIMSS
- If this option is disabled, the Domain Accounts cannot be opened using the XIMSS Interface.
- SMIME
- If this option is disabled, Secure Mail (S/MIME) features implemented in the WebUser Interface are not availble for Accounts in this Domain.
- LDAP
- If this option is disabled, users of this Domain cannot authenticate themselves with the LDAP module ("BIND") using their
account names.
- RADIUS
- If this option is disabled, users of this Domain cannot be authenticated using the RADIUS module.
- WebCal
- If this option is disabled, users of this Domain cannot use the Calendaring functions of the WebUser Interface.
- WebSite
- If this option is disabled, HTTP and TFTP access to this Domain Account File Storage is disabled.
- PBX
- If this option is disabled, users of this Domain cannot use the PBX services.
- HTTP
- If this option is disabled, users of this Domain cannot initiate outgoing HTTP transactions.
Services can also be disabled for individual Domain Accounts.
A service is available for an Account only if that service is enabled for the Account itself AND
for the Account Domain. Disabling a service in the Domain Settings disables that service
for all Domain Accounts.
Note: This is different from disabling a service in the Domain Default Account Settings:
disabling a service in the Default Account Settings disables that service only
for those Domain Accounts that have the Enabled Services option set to default.
Domain Limits
The System Administrator can specify some limits on the resources available to the Domain users.
A Domain Administrator can see, but cannot modify these limits.
Domain Aliases
Each CommuniGate Pro Domain can have aliases (alternative names). If the
client.dom Domain has the mail.client.dom and www.client.dom Domain Aliases,
E-mail and Signals directed to user@mail.client.dom and to user@www.client.dom will be routed to the user@client.dom Account.
Also, to access the user@client.dom Account via POP, IMAP, XMPP, and other
client applications the Account names user@mail.client.dom and user@www.client.dom can be specified in
the client settings.
This is especially useful for WebUser clients. Users specify the
domain name in their browser URLs, and users of the client.dom Domain tend to use
www.client.dom in the browser URLs. You may want to register the www.client.dom domain with the DNS, assigning it
the same IP address as the address assigned to the client.dom Domain, and then you should create the
www.client.dom Domain Alias for the client.dom Domain.
You can modify existing Domain Aliases, add an Alias by typing a new name in the empty field, and remove an Alias by deleting it
from its field. Use the Update button to update the Domain Aliases list.
The Domain Aliases are stored in the DomainAliases database located in the Settings directory inside the CommuniGate Pro base directory.
Directory Integration
The System Administrator can specify if the domain accounts should be included into the Central Directory.
This panel is not displayed for Directory-Based Domains, since those domains are
always completely integrated with the Directory.
See the Directory Integration section for the details.
Server OS Integration
CommuniGate Pro Accounts may be "mapped" to the accounts (registered users) of the
Server OS. See the Accounts section for more details.
Legacy (Unix) Mailer Compatibility
The CommuniGate Pro allows you to create Accounts with external INBOX
mailboxes. These mailboxes are stored not inside the CommuniGate Pro base directory, but in the
system file directory known to the legacy mailer applications.
If you have to support Local Mailer compatibility for all or some accounts in
a domain, you should specify the External INBOX settings:
- External INBOX location
- This setting specifies where the external INBOX files should be located. For each Account
that has an external INBOX, the Server substitutes the asterisk (*) symbol with the
CommuniGate Pro Account name.
Consult with your OS manuals to see where your legacy mailers expect to find user mailboxes.
On most Unix systems, the /var/mail/ directory is the correct location, but some systems
may use /var/spool/mail/ or some other directory.
- External INBOX locking used
- This setting specifies the file locking method to use for updates synchronization.
See the Sharing section for the details.
Domain Security Settings
A Domain can have its own set of enabled Authentication methods. See
the Security section for more details.
A Domain can have PKI settings (Private Keys and Certificates) enabling
secure communications (TLS, Certiciate Authentication, S/MIME) with that Domain.
Use the Security link on the Domain Settings page to open the Domain Security settings.
See the PKI section for more details.
A Domain can have Kerberos keys enabling "secure single sign-on" for that Domain.
Use the Security link on the Domain Settings page to open the Domain Security settings.
See the Security section for more details.
Processing Unknown Names
Addresses used in E-mail messages, in client "login names", and in Signals can contain
unknown names. If the Server cannot find an Object (an Account, a Mailing List, an Alias, a Group,
or a Forwarder) with the specified name, the Domain Unknown Names settings are used.
- Consult External for Unknown
- When an unknown name is supplied and this option is enabled, the CommuniGate Pro Server
sends a command to the External Authentication Helper application.
That application can check an external database (or any other data source) and optionally create a new object (an Account, an Alias, etc.)
with the specified name. If the program returns a positive response, the Server makes one more attempt to find a domain object.
- Mail to Unknown
- This setting specifies what the Server should do when unknown account/object names are encountered in E-mail message addresses.
- Rejected
- The address is rejected; if the message is being received via SMTP, the
address is not accepted, and if it was the only message recipient address, the message is not received at all.
- Discarded
- The address is routed to NULL. The message is considered "delivered"
immediately (it is discarded).
- Rerouted to:
- the address is changed to the E-mail address specified in the text field, and
the Router restarts trying to route this new address.
Note: you specify an E-mail address, not an account
name there. So, if you specify Rerouted To: Postmaster for the client1.com
domain, messages sent to unknown names will be routed to the Postmaster account
in the Main Domain, not to the postmaster Account in that client1.com Secondary Domain.
Specify postmaster@client1.com to direct those messages to the postmaster
Account in the client1.com Domain.
Note: you can use the asterisk (*) symbol in the E-mail address
field. This symbol will be replaced with the original (unknown) name.
- Sample:
- The domain client1.com Mail to Unknown Name option is set to
Rerouted to: Bad-*@support.company.com
A message comes addressed to jjones@client1.com, and the Account
jjones does not exist in the client1.com Domain.
The message is rerouted to bad-jjones@support.company.com
- Accepted and Bounced
- The Router accepts E-mail addresses with unknown names, routing them to the Local
Delivery module. When the message is enqueued
into the Local Delivery module queue, the module fails to find the addressed
account/object, the message is rejected, and an error report is sent back to the sender.
- Calls to Unknown
- This setting specifies what the Server should do when unknown account/object names are encountered in Signal addresses.
This setting is set in the same way as the Mail to Unknown setting.
- Access to Unknown
- This setting specifies what the Server should do when unknown account/object names are encountered in Access operations.
This setting is set in the same way as the Mail to Unknown setting.
Sending Mail To All Accounts in the Domain
The administrator can enable the special virtual list (address) "all"
that can be used to send messages to all Accounts created in this Domain.
Messages sent to the <all@domainname> address are stored directly in the Account INBOX mailboxes,
bypassing any Account Rules.
Messages sent to the <all@domainname> address are not stored in the Accounts that have the
Accept Mail to All setting disabled.
Mail access to the <all@domainname> address can be restricted.
- anybody
- Any message sent to the <all@domainname> is distrbuted to all accounts
in this Domain.
- Clients
- A message sent to the <all@domainname> address is distributed only if it
has been received via SMTP from an Internet address included into the Client IP Addresses list,
or if the message was received using one of the authenticated methods (WebUser Interface, XIMSS,
via RPOP, via POP using the XTND XMIT method, etc.)
- Authenticated Users
- A message sent to the <all@domainname> address is distributed only if it has been
received from a Server user (Account) using one of the trusted methods.
- Authenticated Domain Users
- A message sent to the <all@domainname> address is distributed only if it has
been received (using one of the trusted methods) from an Account in this Domain or
from any other Server Account that has the domain administration right for this domain.
- Authenticated Administrator
- A message sent to the <all@domainname> address is distributed only if it has been received
(using one of the trusted methods) from a Server Account that has the
domain administration rights for this domain.
- nobody
- The <all@domainname> address is disabled. In this case it
is possible to create the real Account, Forwarder, Group, or Mailing List with the All name.
Messages to
<all@domainname> can be sent to all Forwarder addresses, too:
- Send to Forwarders:
- When this option is enabled, a new message is composed. Its envelope contains the addresses from all
Forwarder objects in this Domain. The message body is a copy of the message sent to
the <all@domainname>.
Sending Mail To All Accounts in All Domains
If the administrator has enabled mail distribution to all Accounts in the Main Domain,
a message can be sent to all Accounts in all Domains.
To send a message to all Accounts in all server Domains, it should be sent
to the alldomains@main_domain_name address.
For each Domain, the message source is checked and the message is distributed
to the Domain Accounts only if it passes that Domain "Mail to All" distribution
checks.
WebUser Interface Settings
Each Domain has several
WebUser Interface settings:
- Mail Trailer Text
- The text in this field is appended (optionally) to all messages the Domain users compose
via the WebUser and MAPI Interfaces.
- Site Prefix
- This option allows you to change the URL prefix needed to access Account File Storage via HTTP.
It can be set to an empty string, so URLs for a File Storage will look like http://domainName:port/accountName/.
See the HTTP module description for more details.
- Web Banner Text
- When the HTTP protocol is used to retrieve an HTML file from an Account File Storage in this Domain,
this text is inserted into the beginning of the file HTML "body".
- Recommended XIMSS Mode
- This option controls what the features XIMSS Pre-Login response. The following values are supported:
- TCP
- use a TCP connection for XIMSS sessions, connecting to the same port the current request was sent to.
- XIMSS TCP
- use a TCP connection for XIMSS sessions, connecting to the first port specified for the XIMSS Module Listener.
- HTTP
- use HTTP Binding for XIMSS sessions.
Provisioning
You can control how the Server creates, renames, and removes Domain Accounts.
- Free Auto-Signup
- If this option is enabled, users can create Domain Accounts themselves,
via the WebUser Interface, or by using XMPP, or XIMSS clients.
If this option is enabled, the Sign-up link appears on the WebUser Interface Domain Login page,
and the XIMSS and XMPP modules report their self-registration capabilities.
The Server checks that no Account with the specified name exists and creates a new Account.
The Server uses the Account Template settings for the newly created Account,
overriding its Password and Real Name settings with the data specified by the new user.
- Consult External on Provision
- If this option is enabled, the CommuniGate Pro Server sends a pair of commands to the External Authentication Helper application
every time a Domain Account is created, renamed, or removed, when the Account License Class is changes.
One command is sent before the Server performs the operation, and the other command is sent after the
Server successfully completes the operation.
SMTP Options
The SMTP panel controls how E-mail messages are sent from and received for Accounts in this Domain.
- IP Address for SMTP Send
- Use this setting tell the SMTP module to use a particular
Local IP Address to send mail originated from this Domain. For example, if there is a risk that some of the
Domain users can be involved in spamming activity, you may want to send all the Domain mail
via an IP address dedicated to that Domain, so the other IP Addresses of your Server will not be blacklisted.
The available options include:
- any
- The SMTP module should not use any particular IP Address when sending messages originating from this Domain.
The module allows the Server OS to select some Server Local IP Address for outgoing SMTP connections.
- first
- For all messages received for or generated in this Domain, the SMTP module should use the first IP Address from the set of IP Addresses assigned to this Domain.
Note: in a Cluster setup, the Server selects the first assigned IP address that is local for the Cluster member
actually sending the message.
- same
- The SMTP module should try to use the same Local IP Address that was used to receive the message.
If the message was received using the SMTP protocol or using the XTND XMIT extension of the POP3 protocol
via a Server Local IP Address assigned to this Domain, the same Server Local
IP Address will be used to send the message out (to relay it).
In all other cases, the first IP address assigned to the Domain (see above) will be used.
Note: this option should NOT be used if you have a firewall and some of the Server Local IP Addresses belong to
an internal LAN: users can submit messages via internal LAN IP addresses, and the SMTP module will fail to send those
messages to the Internet if it has to use an internal LAN IP address.
Note: in most cases, the First option (see above) provides better results.
- Force SMTP AUTH for
- If this option is enabled and the SMTP module receives a message Return-Path address
that belongs to this Domain, the address (and the message itself) are rejected unless the
client application user has been authenticated.
See the SMTP Module section for the details.
- Check Recipient Account
- This option specifies if the SMTP Module should perform
additional checks when processing the RCPT TO command targeting a local Account.
If this option is enabled, the module accepts the command only if:
- the Account Mail Service is enabled, and
- the Account Message Storage quota is not exceeded, and
- the Account Incoming Flow control limits are not exceeded.
Domain Rules
Domains can have Automated Rules that are applied to all E-Mail Messages and all Signals being delivered
to Accounts in those Domains. See the
Rules section for more details.
Administrator Domain
Domains can be controlled by the
Server Administrators and by
the
Domain Administrators - Accounts in the same Domain that are granted some Domain Adminstrator Access Rights.
You may choose to grant administration rights for this Domain to Domain Administrators created in a different Domain.
In this case the name of that other Domain should be entered into the Administrator Domain Name field:
If this field is not empty, the Domain Administrator Accounts created in this Domain and
the Domain Administrator Accounts created in the specified Domain can be used to administer this Domain.
See the System Administrator section for more details.
Renaming Domains
If you want to rename a Secondary Domain, open its Domain Settings page,
fill the New Domain Name field, and click the Rename Domain button.
If there is no other Domain with the same name as the specified new
domain name, the Domain is renamed and its Domain Settings page should reappear on the screen under the new name.
You cannot rename a Domain when any of its Accounts is in use.
Removing Domains
If you want to remove a Secondary Domain, open its Domain Settings page,
and click the Remove Domain button. The confirmation
page should appear. If the Empty Domains Only option is selected, a Secondary
Domain is removed only if there are no Accounts in it. Otherwise, all Domain
Accounts are permanently removed, too.
If you confirm the action, the selected Domain, its settings, all
its Accounts and other Objects will be permanently removed.
You cannot remove a Domain when any of its Accounts is in use.
Suspending Domains
You may want to suspend a secondary Domain to close all its currently open Accounts,
sessions, and connections. Attempts to open an Account in a suspended Domain are rejected
with a temporary error (and incoming mail is delayed).
Suspend a Domain if you want to perform OS-level maintenance tasks on the Domain storage
and you need to ensure that the CommuiGate Pro Server or Cluster is not accessing that storage.
To suspend a Domain, open its Domain Settings page, and click the Suspend Domain button.
The Button changes to become the Resume button.
To resume a Domain, open its Domain Settings page, and click the Resume button.
Suspended Domains have the Suspended marker on the WebAdmin Domains list page,
and their Domain Settings pages have the same marker on the page top.
Domain File Directories
The Main Domain data is stored in the Accounts file directory
inside the CommuniGate Pro base directory.
The secondary Domains data is stored in the Domains file directory
inside the base directory. For each secondary Domain, a directory with the Domain name is created
in the Domains directory. All shared Domains in a Dynamic Cluster and stored as subdirectories
of the SharedDomains directory.
If your server or cluster serves many (more than 3,000) Domains, you may
want to create additional Domain Subdirectories inside the Domains and/or SharedDomains directory.
Each Domain directory contains data for all Domain Accounts.
When a domain contains many Accounts, Account Subdirectories
inside the Domain directory can be used.
Domain Subdirectories
When a CommuniGate Pro system serves many Domains (more than 3,000), you may want to place Domain
files directories into several subdirectories:
- many operating and file systems have limits on the number of files in one directory;
- subdirectories can speed up the Domain and Account files access operations;
- subdirectories can be moved to additional storage devices.
Domain subdirectories are directories inside the Domains or SharedDomains directory.
A subdirectory name has the .sub file path extension (suffix).
Subdirectories can be nested.
Note: When the CommuniGate Pro Server starts, it scans the Domains directory and
all its .sub subdirectories, and it collects the names and file paths of all Domains
it finds there.
This feature allows the administrator to change the foldering method
(see below) without stopping the Server and without relocating already created Domains.
It also allows the system administrator to move Domains between subdirectories
at any time when the CommuniGate Pro Server is stopped.
When a new Domain is being created (or when an existing Domain is being renamed), the Server
composes a name for the subdirectory in which the Domain files should be created.
The Domain Storage panel contains the settings that control how a subdirectory name is composed.
Open the Domains page of the WebAdmin Interface, and follow the Domain Defaults link to open the
page that contains the Domain Storage panel:
- Foldering Method
- This option allows you to specify the subdirectory name construction method. The
following methods are supported:
- flat
- This is the default method. All new Domains are placed into the Domains directory
itself (or SharedDomains directory if a shared domain is being created or renamed in a Dynamic Cluster).
- 2 Letters 1 Level
- The first two letters of the Domain name are used to form the name of the subdirectory,
the Domain client1.com will be placed into the Domains/cl.sub/ subdirectory.
If the Domain name has just one letter, that letter is used as the subdirectory name.
- 2 Letters 2 Levels
- The first two letters of the Domain name are used to form the name of a nested subdirectory,
the Domain client1.com will be placed into the Domains/c.sub/l.sub/ subdirectory.
If the Domain name has just one letter, that letter is used as the subdirectory name.
- Hashed 1 Level
- A numeric hash function is applied to the Domain name, the result is used to form a
subdirectory name: the Domain client1.com will be placed into the Domains/nu.sub/ subdirectory.
- Hashed 2 Levels
- A numeric hash function is applied to the Domain name, the result is used to form a
nested subdirectory name: the Domain client1.com will be placed into the Domains/pj.sub/v.sub/ subdirectory.
Note: if you cannot store all Domains on one disk volume, you can copy some xx.sub
directories to other volumes, and replace them with symbolic links.
- Rename in Place
- If this option is not enabled, and you rename a Domain, the CommuniGate Pro Server
uses the currently set Foldering method to compose a new file path for the renamed Domain and
moves the Domain data there. If you have replaced the xx.sub directories with
symbolic links to directories on different disk volumes, such a rename operation may require
moving data from one volume to a different one, and it will fail. If you enable this option,
the CommuniGate Pro Server will move (rename) the renamed Domain data within the same directory,
so the "cross-volume link" problem will be avoided.
Account Subdirectories in Large Domains
When a CommuniGate Pro Domain contains many Accounts (more than 10,000), you may want to place account files in
several subdirectories:
- many operating and file systems have limits on the number of files in one directory;
- subdirectories can speed up the account files access operations;
- subdirectories can be moved to additional storage devices.
Account subdirectories are directories inside the Domain directory. A subdirectory name has
the .sub file path extension (suffix).
Subdirectories can be nested.
Note: When the CommuniGate Pro Server starts, it scans all domain directories and
all their subdirectories, and it collects the names of all domain Accounts.
This feature allows the system administrator to move accounts between subdirectories
at any time when the server is stopped. It also allows you to change the foldering method
(see below) without stopping the server and without relocating already created accounts.
For each Account, the CommuniGate Pro Server remembers the name of the subdirectory
that contains the account files.
When a new Account is being created (or when an existing Account is being renamed), the Server
composes a name for the subdirectory in which the Account files should be created.
- Foldering Method
- This option allows you to specify the subdirectory name construction method. The
following methods are supported:
- flat
- This is the default method. All new Accounts are placed into the domain directory itself.
- 2 Letters 1 Level
- The first two letters of the Account name are used to form the name of the subdirectory,
the Account jsmith will be placed into the domain/js.sub/ subdirectory. If the account
name has just one letter, that letter is used as the subdirectory name.
- 2 Letters 2 Levels
- The first two letters of the Account name are used to form the name of a nested subdirectory,
the Account jsmith will be placed into the domain/j.sub/s.sub/ subdirectory. If the account
name has just one letter, that letter is used as the subdirectory name.
- Hashed 1 Level
- A numeric hash function is applied to the Account name, the result is used to form a
subdirectory name: the Account jsmith will be placed into the domain/pf.sub/ subdirectory.
- Hashed 2 Levels
- A numeric hash function is applied to the Account name, the result is used to form a
nested subdirectory name: the Account jsmith will be placed into the domain/lu.sub/y.sub/ subdirectory.
Note: many systems process large Domains with account subdirectories, too.
Every time an account is to be opened, those systems form the account subdirectory name using
some built-in method. As a result, the built-in method cannot be changed "on the fly",
and accounts cannot be moved between subdirectories. The CommuniGate Pro Server uses its
subdirectory name forming methods only when a new Account is being created or when an Account is being renamed,
and it always remembers
in which subdirectory every Account is located. The Server does not have to form the subdirectory name
every time an Account is to be opened. As a result, the CommuniGate Pro domain "foldering"
methods can be changed at any moment, and the Accounts can be moved between the subdirectories
when the server is not running.
Note: if you cannot store all Domain Accounts on one disk volume, you can copy some xx.sub
directories to other volumes, and replace them with symbolic links.
- Rename in Place
- If this option is not enabled, and you rename an Account, the CommuniGate Pro Server
uses the currently set Foldering method to compose a new file path for the renamed Account and
moves the account data there. If you have replaced the xx.sub directories with
symbolic links to directories on different disk volumes, such a rename operation may require
moving data from one volume to a different one, and it will fail. If you enable this option,
the CommuniGate Pro Server will move (rename) the renamed Account data within the same directory,
so the "cross-volume link" problem will be avoided.
- Generate Index
- If this option is enabled, the CommuniGate Pro Server creates the Index.data file in the
Domain file directory. This file contains the names of all Domain Accounts,
the Account types, and the location of the Account files. When the Server starts and finds
the Index.data file in the Domain directory, it reads that file instead of scanning the
Domain file directory tree. On some file systems scanning a directory tree with 100,000 files
can take up to 10 minutes.
Note: if you have stopped the Server and manually moved/removed some Domain Account directories,
delete the Index.data file from the Domain directory before you start the Server again.
Note: if you want to keep only symbolic links in the Domain file directory, you can create
the Index subdirectory inside the Domain directory (or an Index symbolic link to some other directory).
If this subdirectory exists, the Server stores the Index.data file inside that subdirectory rather than in the Domain file
directory itself.
CommuniGate® Pro Guide. Copyright © 1998-2009, Stalker Software, Inc.