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Hi all..., Nowadays many of the companies asking for
IMS/DB , actually i hav learned mainframes but i dont have
any knowledge on IMS/DB. it will be a great help if any one
suggest me whr i can learn it ( in any institute).
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Answer / sap
IMS is a hiberarchical database managerment system.
It mainly contains two components, IMS DB and IMS TM.
From the function of the two componets, we can understand
as this:
IMS DB: Hiberarchical database. (Using DL/I manipulate
data.)
DB2/ORICALE/MySql : Relational database.( Using SQL
manipulate data.)
IMS TM is similar to CICS (Customer Information Control
System), which is used to deal with transaction.(
Transaction is devided into several types, we can
understand it is a interactive conversion. We draw money
from ATM can be a transaction.)
IMS has a long history, but he is still energiable. At the
same time, IMS has the two components of itself, can
realize the information managerment completely, which
increase the capability. In addition, the maintance cost is
very low.
| Is This Answer Correct ? | 2 Yes | 7 No |
What are qualified and unqualified SSA's.
What is multi positioning ?
This question regarding Checkpoint. Suppose my program has checkpoint for every 100 records. If my program abends at 120 records, what will happen. I know first 100 records are committed and rest of 20 records where they gone and where they are stored.
Explain the two ways in which dl/i interface can be invoked?
An application programmer comes to you and says your DB is no good, they got an II status code on an insert call from IMS, is this a DB problem?
I found some good questions/answers regarding IMS here:
What is dbdgen process?
What type of pointers should you specify on the root segment of a HIDAM DB to improve sequential processing?
15. Secondary indexes can be used with following databases a. HSAM,HISAM,HIDAM b. HIDAM, HISAM c. HDAM, HISAM, HIDAM d. All the above
What information does a psb contain?
Define psb?
Explain the maximum number of segment types allowed for a single database?
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