NSD (NOTES System DIAGONIST) -> call stacks for all threads, memory information.search -> fatal, panic, segmentation, fatal_errorshared memory

The four major sections within NSD

1.Process Information (Call Stacks) - all threads of each Domino Process2.Memcheck (Domino Memory Objects) - both private and shared , which resources are involved in a given problem.3.System Information - OS version, Service pack, disk , network info4.Environment Information - notes.ini, domino executable file

MAIL ROUTING

SMTP allowed for MIME messages only - If the destination is a Domino server running the SMTP listener and the message deposited in MAIL.BOX is already in MIME format, the Router sends it using SMTP. Messages in Notes rich text format are sent over Notes routing.

NRPC – Notes Routing Protocol - 1352

REPLICATION

Replication involves the synchronization of data between two replica copies of a database. Replicas can be stored either locally or on the Domino server. Replication between two server-based databases is called server-to-server replication. Replication involving a local database is called workstation to- server replication.

Replication Topologies :-HUB-AND-SPOKEHub-and-spoke replication establishes one central server as the hub, which then schedules and initiates all replication with all of the other servers, or spokes.

PEER-TO-PEEREvery server being connected to every other server. Because peer-to-peer replication quickly distributes changes to all servers

RINGServers are connected in a circle, where documents replicate from one server to another in a single direction.

REPLICATION :-1. PULL-PULL (both server include)—Bi-directional.2. PULL – PUSH (default )-only source server include—Bi-directional.3. PULL ONLY –only source server.---Uni directional.4. PUSH ONLY –only source server included. --Uni directional.

DOMAIN DOCUMENTS

• Adjacent domain document• Non-adjacent domain document• Foreign domain document• Foreign SMTP domain document• Global domain document

ADJACENT DOMAIN DOCUMENT

Create an Adjacent domain document when you need to restrict the transfer of mail from one adjacent domain to another.

NON-ADJACENT DOMAIN DOCUMENT

Create a Non-adjacent domain document to control message routing to a non-adjacent domain. Non-adjacent domain documents serve three functions:

FOREIGN DOMAIN DOCUMENT

Create a Foreign domain document to define the path between a Domino domain and an external application, such as a fax or pager gateway. A Foreign domain document identifies the Domino server that acts as the gateway to the external application.

FOREIGN SMTP DOMAIN DOCUMENT

A Foreign SMTP domain document provides servers that don't use SMTP routing and which do not have access to DNS with the next hop information required to route Internet mail. You can also use Foreign SMTP domain documents with servers that route mail over SMTP to configure different routing paths for mail sent to different destinations.

GLOBAL DOMAIN DOCUMENT

A Global domain document identifies the Internet domains that are considered to be internal to a Domino domain and for which the local domain can accept mail.

WHAT IS A DOMINO CLUSTER & CLUSTERING REQUIREMENTS?A Domino cluster is a group of two or more servers that provides users with constant access to data, balances the workload between servers, improves server performance, and maintains performance when you increase the size of your enterprise. The servers in a cluster contain replicas of databases that you want to be readily available to users at all times. If a user tries to access a database on a cluster server that is not available, Domino opens a replica of that database on a different cluster server, if a replica is available. Domino continuously synchronizes databases so that whichever replica a user opens, the information is always the same.IBM Lotus Notes® clients can access all Domino cluster servers. HTTP clients (Internet browsers) can access only Domino Web servers in a Domino cluster.

Clustering requirements:1. All servers in a cluster use TCP/IP Protocol.2. All servers in the Cluster uses the same Domain and servers must use the same DominoDirectory.3. A server can be a Member of only one cluster.4. All servers in a Cluster should be above R4.63 Enterprise Edition server.5. Placed the Cluster servers in the Private LAN (Optional)6. Client software is above R4.5 & Client should use the TCP/IP protocol.There are two major reasons to create a replica for a database in a cluster -- to provideconstant availability of the data and to distribute the workload between multiple servers.If you create too many Replicas’ in the cluster then it is unnecessarily to the overhead ofmaintaining a system and affect performance.