Answer / annabathula

Redo Log:-

Redo log management plays a part in the following actions

During execution of a modifying transaction, the redo log entries are included in the log queue. The log writer writes the

log pages from the log queue to the log area.

During a Structure linklog backup, information is obtained on whether entries from the log area are to be backed up, and if

so, how many.
In the case of a restart or recovery, the required redo log entries are read from the log area.
The database parameters and other internal information that controls logging are stored in the log area and updated at

regular intervals.


Mirroring:-

It is essential to mirror the online redo log files in database. This procedure describes how you can check the mirroring

with BRSPACE. Also, the system check in BRCONNECT checks mirroring.
If you lose one or more online redo log files, you can no longer recover the database changes recorded in them. This means

that you can only recover the database up to the first gap in the online redo log records. For this reason, we strongly

recommend that you mirror the online redo log files. We recommend that you make at least one copy.
If an online redo log file of a group is lost, the database remains in operation. Oracle then uses the remaining member (or

members) of this group to log the database changes. In such a case, you must recover the original mirroring of the online

redo log files as quickly as possible.

Answer / devd

In the Oracle RDBMS environment, redo logs comprise files in
a proprietary format which log a history of all changes made
to the database. Each redo log file consists of redo
records. A redo record, also called a redo entry, holds a
group of Change vectors, each of which describes or
represents a change made to a single block in the database.
For example, if a user UPDATEs a salary-value in a table
containing employee-related data, the DBMS generates a redo
record containing change-vectors that describe changes to
the data segment block for the table. And if the user then
COMMITs the update, Oracle generates another redo record and
assigns the change a "system change number" (SCN).

what post steps and pre steps db refresh

0 Answers   vCentric Technologies,

---

What is the relevance of the Deletion Flag/Indicator in the archiving process?

1 Answers  

---

i have t-code su01 in crm and r3 in a financial org.i can create sap ids , unlock /lock sap ids , assign t-code, roles & assignment to users . what else can be done ? more importantly am i eligible for a job in sap basis since i am doing this job for last 2 years ?

4 Answers  

---

How to schedule background jobs at OS level?

4 Answers   TCS,

---

will the work processes other than dialog ever goto priv mode?

1 Answers  

---

In CUA, I am unable to changes from DEV to QAS or PRD.How to troubleshoot this problem?

2 Answers   Terrenos,

---

As per your process, Lets say someone asked you access for SAP_ALL and you got approval from the business head to assign but you did not get approval from the Security head. In this case, what will you do?

1 Answers   Infosys, Spine Infoway,

---

How to lock or unlock a transaction code using sm01?

0 Answers  

---

How can a client be locked?

6 Answers  

---

What are the daily transactions?

0 Answers  

---

Can any one tell me some real time errors you got for support pack apply, During transport request export-import and for db dackup.

0 Answers  

---

What is redolog file? Path?

0 Answers  

---