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Former Member

SAP BOOT UP SEQUENCE

Hi Sapians.

Can any one kindly let me know the SAP Bootup Sequence.

What happens Internally while bringing the SAP CI UP.

What are the sequence that SAP Access the 3 Profile Files

Thanks and regards

Dan

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2 Answers

  • author's profile photo Former Member
    Former Member
    Posted on Sep 06, 2007 at 04:01 PM

    Starting an SAP System is performed in a number of steps and is the task of

    the operating system user <sid>adm.

    <b>Start the database:</b>

    a. The underlying element of the entire SAP system is the database. Before

    the SAP instances are started, this must have operational status. The

    database is therefore always started as the first step.

    <b>Start the central instance:</b>

    a. Next, the operating system collector SAPOSCOL is started, if it is not

    already active. This is a standalone program that runs in the operating

    system background, independently of SAP instances. It collects data

    about operating system resources and makes this data available through

    the shared memory of all SAP instances.

    b The central instance with the message server and the dispatcher and its

    work processes is then started. Only once the message and enqueue

    servers are active can other instances be started, if desired.

    <b>Start other instances</b>:

    a. If the dialog instance is not running on the same host as the central

    instance, the SAPOSCOL operating system collector is first started on

    this host.

    so from the above initial CI startup profile is read with the help of default profile then instance profile is read

    Samrat

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  • author's profile photo Former Member
    Former Member
    Posted on Sep 07, 2007 at 01:57 PM

    Thank You

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