What is the role of the archived in an incremental backup redo log files?

I want to know, to which RMAN reads what block of data is changed after the last incremental backup.
and what is the role of the archived in an incremental backup redo log files?

Please guide.

Hello

First Querstion response->
Each block of data in a data file contains a system change number (SCN), which is the SCN of the last change to the block. During an incremental backup, RMAN reads the RCS of each block of data in the input file and compares at the checkpoint SCN of the incremental backup from parent. If the RCS in the block of input data is greater than or equal to checkpoint SCN of the parent, then RMAN copies the block.

2 - the archived redolog files are required for the restoration of the online of rman incremental backup in a consistent state.

Thank you & best regards
Rahul Sharma

Tags: Database

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  • With the help of Windows agent to send log files

    Hello

    I really need to understand the sending of log files by using the Windows agent.  I have seeen your doc about this and it is a bit easy.  Then the event_marker is complicated.  The example shows a bunch of control characters and braces.    I need to understand the parameters event_marker.  Which, in a text file suggests that there must be a event_marker?

    Thanks in advance,

    Michael

    Hey Michael - don't know how I missed this one! The event_marker is a regular expression that is known to match the beginning of a new log message. For example, say I have the following logs:

    2014-03-27 10:29:38, 534 [pool-35-thread-1] DEBUG opId = com.vmware.sps.qs.notify.VasaProviderInfoNotifier - survey for the VASA provider changes

    2014-03-27 10:29:38, 540 [pool-35-thread-1] DEBUG opId = com.vmware.vim.query.client.impl.QueryDispatcherImpl - send request:

    declare default element space namespace "urn: vasa;

    declare namespace qs = "urn: vmware:queryservice";

    declare namespace vim25 = "urn: vim25";

    declare namespace xlink = "http://www.w3.org/1999/xlink";

    declare namespace vasaData = "http://data.vasa.vim.vmware.com/xsd";

    declare namespace vasa = "http://com.vmware.vim.vasa/1.5/xsd";

    for $doc in //VendorProviderInfo

    return

    {data ($doc/vasa: back / vasaData:uid)})}

    2014-03-27 10:29:38, 543 [pool-35-thread-1] DEBUG opId = com.vmware.vim.query.client.impl.QueryDispatcherImpl - recorded flow (QueryResponseMonitor): 27227

    You can see how the second message is a multiline message. If you do not specify an event_marker then the multiline message will be divided into individual events. However, if you specify an event_marker with a regular expression that matches the start of an event, then it will not break the message upward. For the type of message above, I could use an event_marker like:

    {event_marker = ^ \d{4}-\d {2} - \d {2} \d{2}:\d{2}:\d{2},\d{3}

    Which matches: 2014-03-27 10:29:38, 534

    The event_marker can be as short or as long as you want, but you must ensure that the regular expression that you specify is guaranteed to match a new event. I hope this helps!

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