Physical and Logical Partioning

Hi Friends,
I would like to know what is the difference between these 2 types of partioning?? Is there any OSS notes to gain knowledge on this??
thanks,

Hi,
http://help.sap.com/saphelp_nw2004s/helpdata/en/0a/cd6e3a30aac013e10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/33/dc2038aa3bcd23e10000009b38f8cf/frameset.htm
to check number of partition, use table RSDCUBE field PARTVL_FROM,PARTVL_TO,PARTMAXCNT
hope this helps.
thanks
DST

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Separation of the physical and logical structures

Hi,
I am very new to Oracle database administration. While reading Sam Alapati's book "Expert Oracle9i Database Administration," I came across the concept of the separation of an Oracle database’s physical storage structures from its logical storage structures. In particular, Sam states the following in his book:
“This logical defining of Oracle's database structure has another fundamental motive behind it. By organizing space into logical structures and assigning these logical entities to users of the database, Oracle databases achieve the logical separation of users (owners of the database objects, such as tables) of the database from the physical manifestations of the database in terms of data files and so forth.”
I am not quite convinced about the value this separation of the physical and logical really adds to the task of database administration. Considering the way DBASE worked, i.e. each table used to be stored as a separate file, what would be lost if Oracle’s implementation were similar and each table (i.e. file) were to be assigned to a particular user. I am not sure of the value added by storing the data from more than one table in more than one file, effectively resulting in a many-to-many relationship between tables and files. Please enlighten me. I would really appreciate it.
Karim

and each table were to be assigned to a particular user. Don't know what you mean. In Oracle, every table has one and only one owner.
I am not sure of the value added by storing the data from more than one table in more than one fileIf an application has a thousand tables, would you rather manage 1000 files or 1?
In general, separating the physical from the logical allows the physical structure to change without affecting the logical (in theory at least). Even a table is a logical structure. We think of rows and columns, but it isn't stored the way we think of it. When we do a select statement, we don't have to write code to read each block, extract the contents, etc.
With partitioned tables, it is sometimes a good idea to split up partitions in such a way to get a performance gain. Like placing the most recent (and most queried) month of data on the fastest storage device. If you stuffed everything in to one gigantic file, you would lose that ability.
If you want to store each table as a separate file, you can do that with Oracle. For each new table, create a new tablespace, and then create a new file for the tablespace. Then come back to this forum in a year and tell us how it's going.

How to collect physical and logical disk counters using query?

Hai friends, i want to view physical and logical disk counters in sql server like Avg. Disk sec/Read, Avg.
Disk Bytes/Read, Avg. Disk sec/Write, Avg.
Disk Bytes/Write, etc., Can anyone tell me how to vies this by using query?
Thanks in advance..

Hai friends, i want to view physical and logical disk counters in sql server like Avg. Disk sec/Read, Avg.
Disk Bytes/Read, Avg. Disk sec/Write, Avg.
Disk Bytes/Write, etc., Can anyone tell me how to vies this by using query?
Thanks in advance..
Hello,
Sys.dm_os_performance counter will only show counters related to SQL server not Physical disk if you run below query in SQL server it will not return any value so no disk counter is present.You will have to see it using perfmon.
select * from sys.dm_os_performance_counters where counter_name like '%disk%'
This can also be done through power shell but I dont have experience with that.You can search net for power shell query to see Windows perfmon counters
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

OBIEE -10.1.3.4.1 - high physical and logical query response

Hi All,
I am facing an performance issue in OBIEE 10g .My report is taking 2 mins to come up and when i fired the physical query in the db the data is coming in 2 secs.
Below is the details from the log file.Here I observed that response time for physical and logical query is 109 sec ~ 2 mins.Please provide me the helpful pointers.
+++Administrator:370000:370015:----2013/01/22 07:28:04
-------------------- Execution Node: <<2650466>>, Close Row Count = 3332, Row Width = 26000 bytes
+++Administrator:370000:370015:----2013/01/22 07:28:04
-------------------- Execution Node: <<2650466>> DbGateway Exchange, Close Row Count = 3332, Row Width = 26000 bytes
+++Administrator:370000:370015:----2013/01/22 07:28:04
-------------------- Execution Node: <<2650466>> DbGateway Exchange, Close Row Count = 3332, Row Width = 26000 bytes
+++Administrator:370000:370015:----2013/01/22 07:28:04
-------------------- Query Status: Successful Completion
+++Administrator:370000:370015:----2013/01/22 07:28:05
-------------------- Rows 3332, bytes 86632000 retrieved from database query id: <<2650466>>
+++Administrator:370000:370015:----2013/01/22 07:28:05
-------------------- Physical query response time 109 (seconds), id <<2650466>>
+++Administrator:370000:370015:----2013/01/22 07:28:05
-------------------- Physical Query Summary Stats: Number of physical queries 1, Cumulative time 109, DB-connect time 0 (seconds)
+++Administrator:370000:370015:----2013/01/22 07:28:05
-------------------- Rows returned to Client 3332
+++Administrator:370000:370015:----2013/01/22 07:28:05
-------------------- Logical Query Summary Stats: Elapsed time 109, Response time 109, Compilation time 0 (seconds)

Did you run the SQL from a client on the OBIEE server or your local machine? Does the Physical SQL on the OBIEE server against the DB run in 2 Seconds and when sent by the OBIEE server it takes 109 seconds?? Is that correct?

Export physical and logical details on ASA 5520 and 8.0 software

Hello...does anybody know if there is any way to export details of the physical and logical interface details (including interface descriptions) to Excel, PDF or and other format from the command line or ASDM?
Thanks,
John

Export directly in xls, xlsx or pdf - no.
The output of "show run interface" or "show interface" is pretty structured however and easily parsed by Excel - either manually or via a macro. See output below (you can omit the interface identifier to get all interfaces. I used one for brevity.)
One can build a script to log in, perform an arbitrary command logging the output to a file which can then be massaged to extract the information you want in a suitable format (csv, etc.). Once in Excel it can be saved as pdf if you're so inclined.
Of couse, some of the full-featured network management tools do a lot of this (and lots more) if you have them.
ASA-1# sh run int eth0/0
interface Ethernet0/0
nameif outside
security-level 0
ip address x.x.x.x 255.255.255.224
ASA-1#
ASA-1# sh int eth0/0
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 1000 Mbps, DLY 10 usec
Auto-Duplex(Full-duplex), Auto-Speed(1000 Mbps)
Input flow control is unsupported, output flow control is unsupported
MAC address 0013.c480.6b50, MTU 1500
IP address x.x.x.x, subnet mask 255.255.255.224
14156274 packets input, 16095096189 bytes, 0 no buffer
Received 44764 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 pause input, 0 resume input
0 L2 decode drops
8548524 packets output, 1006461151 bytes, 0 underruns
0 pause output, 0 resume output
0 output errors, 64 collisions, 6 interface resets
95 late collisions, 627 deferred
0 input reset drops, 0 output reset drops, 0 tx hangs
input queue (blocks free curr/low): hardware (255/230)
output queue (blocks free curr/low): hardware (255/125)
Traffic Statistics for "outside":
14156267 packets input, 15839536990 bytes
8548619 packets output, 820243613 bytes
39502 packets dropped
      1 minute input rate 2 pkts/sec, 349 bytes/sec
      1 minute output rate 2 pkts/sec, 425 bytes/sec
      1 minute drop rate, 0 pkts/sec
      5 minute input rate 2 pkts/sec, 2091 bytes/sec
      5 minute output rate 1 pkts/sec, 352 bytes/sec
      5 minute drop rate, 0 pkts/sec

Changing ip of physical and logical host

I have a 2 nodes Sun cluster 2.2 working. I have to put it in another lan, so I have to change both Physical and logical host and terminal concentrator and console ip addresses. How can I do?
Thanks

I don't see a reply so I'll take a shot. Just like you have 0-9 for numbers and you can arrange them anyway you want, you still only have 0-9. You have the physical (system block and datafiles) which are somewhat static. Then you have the the logical (tablespace, segements, extents)which are volatile and connected by chaining (links) which may be all over the place in the physical but appears to be one whole unit in the logical. Just like an image on a TV screen wearing a red hat, you see a red hat (logical) but it is actual pixels which are chained or linked (data pointers) to each other by the color red. I hope that helps until someone comes by with a better answer.

Difference between physical and logical standby database

What is the difference between physical and logical standby database?

Hi,
Physical Standy where its a read only DB.
Logs are applied.
Logical Standy where it can be Read / Write DB and the logs are applied in terms of SQL Statements.
Thanks & Regards,
Pavan Kumar N

Oracle - ROWID (Physical and logical)

Hi,
Could you please clarify the below doubts?
- Difference between Physical and Logical ROWID's
- Difference between ROWID and UROWID datatypes
Regards,
Ragav

Instead of an answer, may I suggest you go through following link?
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/datatype.htm#sthref3894

Merge physical and logical partitions

How do I extend my physical arch partition with an unallocated space logical partition?
I want to add an unallocated space logical partition to a physical partition
or better said I want to grow my existing arch physical partition with the unallocated space logical partition.
Last edited by karlzt (2010-03-20 15:50:31)

It is not that easy. You can resize and/or move either physical partitions or locical partitions inside the space of the (physical) "extended partition". But you cannot simply take space from a logical partion and assign it to a physical partition adjacent to the extended partition it is part of. Which means you can extend a physical partion only from free space which you can produce by a prior shrinking/moving another adjacent physical partition.
The problem is, I currently know of no way to shrink an extended partition without losing some of the enclosed logical partition data (or even all logical partions at once). One could try, as a proper backup is advisable in any case before messing around with partitions.

Physical and Logical path

Hello,
what is a physical file and logical file in PATH table of SAP.
Plz help,
aafaq

Hi aafaqhusain,
1. logical file path is nothing but a    IDENTIFIER/STRING/NAME
= the name by which
   we refer to that file.
(in our programs)
2. The physical location of that file,
   may change from server to server,
or from time to time.
(hence, we do not use hardcoded physical path,
   in our programs,
   but instead use this MAPPING of logical path,
to the physical path)
regards,
amit m.

Manipulations with physical and logical names

Hello ppl,
Is there any way to see/change phisical and logical names of object in one place/screen? I mean I want to set them to different values and see that change, but without fuzzu, complex way of changing naming and propagate modes.
TIA,
Alex

Mark,
Under project, preferences (from the main console) you can set the naming and also the propagation method. That's what I hate to do :) However, thinking deeper I find it ok - first finish with modelling and physical names, than correct logical names as needed without propaation to physical.
Alex

Physical and logical partation of cube

hi
can i get scenerio for logical and physical partation of cube.
based on year or calmonth that is called physical partation? or not
what is logical partation

Hi sunil,
Partitioning is mainly done to increase the performance by optiomizing the Time Utility.
Physical Partitioning is the partitioning done at the database level and to do so, we can partition based on the Time,date so on... In terms of Cube partitioning we usually use 0CALMONTH, 0CALYEAR or 0FISCYEAR.
And
Logical Partitioning is the partitioning done at the Query level while retriving data from the cube. This is said to be Logical because the data is not partitioned at the database level.
Ex: Restict the Query using 0CALMONT,0CALYEAR.
Hope this helps you and solves your problem,if it helps assgn pnts.
Regards
neelima

Physical and Logical Standby

Hi
I just wanted to know can i have one Physical and One Logical Standby for a Single Primary Database. Is there any precautions and steps to be followed .
Thanks

user9366471 wrote:
Hi
I just wanted to know can i have one Physical and One Logical Standby for a Single Primary DatabaseYes this is possible.
See following Oracle 10.2 example which talks also about cascaded standbys:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/cascade_appx.htm#i637055

Semantic and Logical partions

Hi All,
Please can someone help me to understand what are the advantages of Semantic partinitioning of BW 7.3 over Logical partioning of BI 7.0
thanks

That is a good question. A semantically partitioned cube is not the same as a multiprovider, and the table RRKMULTIPROVHINT is specifically designer for MultiProviders so my initial thoughts are that it is not required to maintain this.
However, there are many similarities between a MP and a partitioned cube, and you want to make sure that at runtime only the relevant partitions are accessed.
I would expect that SAP automatically provide DB Hints based on the definition of the partitioning. The reason why this does not happen with MultiProviders is that it is hard to automatically 'predict' which characteristics are used for partitioning. In the semantic partitioned cube, this is defined in the system so SAP should take this into account at execution time.
Jan.

Physical and Logical Structures of DB

Hi all
Why datafiles are called physical structure of database and tablespace,segment etc are called logical structures of database as datafile is also a name given to memory area on disk drive ,therefore it should also be called logical structure

user13345475 wrote:
as datafile is also a name given to memory area on disk driveNo it is not. There are no "+memory areas+" on disk. The closest to that will be a virtual memory page that has been written to disk (e.g. written to a raw swap device or to a swap file).
A physical disk itself does not have "memory areas" on the disk platters. The correct term would be "storage location". Memory areas exist in physical memory instead.
I suggest that you review your understanding of technical terms.

Physical and Logical Partioning

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