Two TT instances with same physical files

HI All,
can we have two timesten instances sharing the same set of physical files like check point , log files .
Node A
Timesten instance1 running
Node B
Timesten Instance2 running
both Timesten instances instance1,instnce2 with shared physical ( check point , log files )
Please tell me above configuration is possible or not

Can you please elaborate on the background to this question? Do you want to 'share' the files such that both instances can use them concurrently or is this related to some form of shared disk failover/HA mechanism?
It is absolutely not possible to concurrently access the same set of datastore files from two different instances and in fact TimesTen goes to some lengths to prevent this. If you managed to circumvent this protection the result would be a totally corrupted database.
It is possible to use shared disk failover with TimesTen though this is not at all an optimal way to implement HA with TimesTen. TimesTen replication is the recommended HA mechanism to use.
Chris

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Two Coherence instances with same JVM

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I have a special case need your advice.
we have an architecture platform build on top coherence to support some system data (session persistence data...etc).
and we are building applications on top the platform, the applications also need coehrence to support Application distributed data.
which is the best practice:
- Load two coherence instances with two separate configs
- share same instance with same config file
to isolate clear two parts, we prefer first solution, but we don't know which is drawback for this solution.
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Jerome

Hi John,
I beg to differ: all you need to do is ensure that Coherence is loaded by two independent class loaders and not from a common parent class loader.
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Best regards,
Robert

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Is it possible to install two SAP system with same system ID (SID) but different instance numbers on one host?
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Sarim

Is it possible to install two SAP system with same system ID (SID) but different instance numbers on one host?
Yes, it is possible. If one is CI (PAS) and the second one is an AS (AAS). In this case there will be only one database.
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HT5177 How can two people edit the same FCPX file? One company, so both people/computers share the same license. Example: I work on revision A and my boss takes it and makes revision B and gives it back to me using two separate computers.

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Reflection - Two packages/classes with same name

Hi There !
I am in a situation and I need some help, if anyone can help me.
I have two tools to work with different version of a server application. Now, the admin wants to have only one tool to work with both server app.
The problem is that the server app has a jar file with the API to be used to access it. One jar for each version.
Inside those jars files I have the same package and the same class ! But the implementation is diferent. So I will need to access one jar when accessing the old server app and another jar to access the new server app.
I have no idea how to do it.
I search arround google and I found that I can load a class at runtime and then with Reflection call its methods.
I made a test app (simple, just 2 different jars with same package and class name just printing a Hello World and Bye World) and it worked very well.
But when I tried to apply this to my code, I realize that one class need the reference of the other class...
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The Server class do the connection to the server and the ServerStatus get some server information. But the method that give me this information has a argument asking for an object of Server... like this:
Server serv = new Server();
serv.connect();
ServerStatus servStat = new ServerStatus();
servStat.getServerStatus(serv);I tried to do this with reflection but in the part that I need to invoke the method getServerStatus, I do not have the name of the class that is the argument (in this case Server).
Something like this:
Method m = serverClass.getMethod("getServerStatus", new Class[] {?????.class});
result = (Boolean)m.invoke(server, new Object[] {serverStatus});Do you have any ideiias to resolve this ?
Or something different from reflection to access two different implementations with same package and class name ?
If you need any other information, please ask me..
Thank you so much !
Regards,
Thiago

Thiago wrote:
Hi.
But now, how can I handle the object (because the newInstance() return a Object object.... not the class that I want (Server, for example)).
When you declare a reference to be something more narrow than "Object" you're telling the compiler what methods and fields the referenced object supports. With a dynamically loaded class you can't do that at compile time, because the nature of the class isn't known until you load it at runtime.
That's why it's very handy if you know that the class you are to load implements some interface which is known at compile time. Then you can access the object through a reference to that interface.
Otherwise there's really no option but to handle the object through reflection. Find methods with getMethod() on the Class object and invoke them with Method.invoke().
There are tricks to impose an interface onto a dynamically loaded class at runtime, but they are just neat ways of working through reflection.

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I tried creating two soa domain with same name "TestSOADomain" (different path) sharing same SOA schema .However one domain came UP to Running mode and other domain going to AdminMode and "soa-infra" application of that domain is not active.
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If possible what are all the problems might come
1. While executing soa composites with asyncronous behaviour ?
2. How the polling services will work ?
3. will the XREF_DATA table ROW_NUMBER column inserted uniquely while inserting data from two different domain into same SOA schema ?
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Thanks

Each domain is expected to refer to its own unique database schema. Same SOA schema should not be shared by multiple SOA clusters/domains. It is technically possible though, I suppose, and still can run fine any one SOA environment at any given time with the other SOA environments/domains (sharing the same SOA schema) shutdown. It is not the general/recommended practice to share SOA schema across domains and there could be potential implications and unexpected behavior, particularly when the SOA environments pointing to the same schema are all running at a time.

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Hi ,
I need to get the Common data from Two Internal Tables with same structure with using the looping method.
For e.g.
I have two internal table say ITAB1 and ITAB2.
ITAB1 has values A,B,C,D,E,F
ITAB2 has values A,H,B,Y,O
Output at runtime should be : A,B

Hi mohit,
1. If u want to compare all fields,
   for matching purpose,
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2.
report abc.
data : a like t001 occurs 0 with header line.
data : b like t001 occurs 0 with header line.
loop at a.
LOOP AT B.
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ENDLOOP.
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amit m.

Trigger two FPGA instances at same time

I have some basic FPGA code that transmits data bits over a serial bus (RS485), The code is written so that it waits in the first state of a state machine in a single cycle timed loop. Upon a certain trigger, it starts reading a FIFO containing data and sends the data out on a Tx line. It does this until all bits are send then it goes back to the first state to wait for the next trigger. The trigger is needed because windows has to fill the FIFO first before the FPGA can start sending.
I need two instances of this code running because I have two com busses (one is redundant). So I am using the FPGA code as a subvi and I wrote a main FPGA vi to call two separate instances of the subvi in parallel. A regular windows vi writes to the FIFOs for Tx and reads FIFOs for Rx. No problem so far.
The trick is that I have to start both transmissions within 200nS of each other (yes, nanoseconds). Windows will write to both FIFOs in parallel, but the timing is 4uS apart, too long. I tried setting up a boolean flag in the FPGA subvi, but windows can't write to the subvi control directly. FPGA won't allow it (the Write function is greyed out). I tried using a FIFO for a flag, but the problem is a race condition. One of the instances will read the FIFO first and wipe it out. The other does not get to read it. I need one common trigger point to be used by both subvi instances.
My final solution was to use a memory in the FPGA subvi and a numeric control in the main FPGA vi. Windows write to the numeric control, It can because the control is in the main FPGA vi. Inside the main FPGA, I run a timed loop that looks for the numeric to be other than zero. If so, it writes the value to the memory location used by the FPGA subvi. After some time, the main writes a zero back to the memory to prevent the subvi from starting up again, and it writes a zero to the numeric to reset it. The whole thing repeats, waiting for windows to write to the numeric again for the next transmission.
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- tbob
Inventor of the WORM Global
Solved!
Go to Solution.

tbob wrote:
Basically I did the same thing using FPGA Memory. From windows I write to a numeric control which resides inside the FPGA Main vi. In the FGPA main, I write to the Memory. Inside the FPGA subvi, I read the memory and decode the value to either use one or the other or both busses. After fooling with this for some time, because the Read Memeory needs to use a shift register (probably due to it taking an entier clock cycle), I got it to work. Both busses trigger at the same time. I guess it really doesn't matter if I use a FIFO or if I use Memory. The main issue is that I have to write from Windows to the FPGA Main, and then from the FPGA Main to the FPGA subvi. Then the timing is exact as far as the subvi is concerned.
There are a couple of advantages to using two FIFOs over your approach. First, you don't need the shift register for the memory location. Second, you don't have to worry about which VI is responsible for clearing the memory location, nor do you run the risk that one of your subVIs will execute twice, or not at all, if the memory isn't cleared at the right time. Perhaps most importantly, you'll save yourself space on the FPGA because you won't need arbitration - the extra code that gets added when two parts of the FPGA try to access the same resource at the same time. In your case, both instances of the subVI access the memory block concurrently, so the FPGA compiler adds extra logic to prevent conflicts. If you only read the memory block in one place and only write it in one place (the read and write can be in different loops or subVIs) there's no need for arbitration. By using two FIFOs you can keep them independent and avoid the conflict resolution code. See the help for "arbitration" for more details.

Create two logical columns with same LTS mapping but diff filter conditions

Hi,
Problem:
How to create two logical columns within same logical table mapped to same physical column but different filter conditions?
I have a scenario where in,
Physical layer columns
     - table1.employee
     - table1.emp_city
I need a columns in logical layer:
Logical layer - lt1.count_emp_delhi (counts distinct employees whose city_name = 'Delhi')
          lt1.count_emp_mumbai(counts distinct employees whose city_name = 'Mumbai')
My approach:
For Delhi column
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2. Aggregate using countdistinct in aggregate tab.
3. Edit the mapping condition
     3.1. Use the where clause and set table1.emp_city='Delhi'.
For Mumbai column.
Followed the same approach as above but in 3.1 if I change the condition to 'Mumbai', even the delhi column is populated with mumbai count which is ERRONEOUS
Could some one please help?

Hi,
1. Create two alias tables for table1 in Physical Layer. Lets say TB_Mumbai and TB_Delhi
2. Create a logical table in BMM layer (D1 Employee Cities )
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4. Now you can see two Logical Table Sources (TB_Mumbai and TB_Delhi )
5. Now using Where condition, write the condition on each table
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Hope it helps you.
Regards,
Kalyan Chukkapalli
http://123obi.com

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Hi,
I am using sqlldr to load data from a csv file into a table. The table has 23 columns in it. The last column is nullable. The CSV has got 23 column values for all the records excepting couple of records which have 22 values leaving the last 23rd field blank as 23rd column in the table is nullable. Sqlloader loaded everything fine in Dev env but the records failed on Live Env with error - 'Rejected - Error on table ...column not found before end of logical record (use TRAILING NULLCOLS)'.
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Regards,
Ash

Ash -
Are you saying you had one file, copied to two servers, and the copy you sent to live never works on either server, but the copy you have always had on DEV works fine? This sounds like an operating system or network issue, where moving the file caused a change you cannot see. Typically happens when you go between Windows and Unix, because the end-of-line sequences are different. You could try using file comparison tools to see if they really are the same (diff on Unix, fc on Windows). You could also use the Unix utility od (octal dump, e.g. od -c file1) to see what you cannot see.
Good luck,
Andy

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Two environments to the same physical location

May I open two environments (one readonly and one with write access) to the same physical location on the disk?
I think to use the one with readonly access as consumer of data but the second as manager and provider of data.
Both environments will be established by different processes (applications) or VMs.
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Hi,
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http://www.oracle.com/technology/documentation/berkeley-db/je/GettingStartedGuide/multiprocess.html
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--mark

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While configuring OBXK ( Automatic GL account for bank charges) , I see there is provision to enter only one GL account per chart of accounts.
We have two company codes using same chart of accounts but different bank charges GL account. Please tell me how to configure this.
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Hi,
Thanks Krishnan and Chandra.
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Hello,
Is it possible to request 2 license for two systems with same SID. The systems are on different machines and their HW key are different but both have same SID. While requesting license, will it permit to create 2 different license with SAME SID.
Regards
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Hi Anil,
The one for which the license is already requested is the main development portal with SID EP2. I have installed one local version of SAP EP with the same SID EP2. Now we need a license for the second system.
If we change the HW key of the original license which is already applied in the main development portal under SMP and apply for a new license for the new local version, can it have any future implications, if any.
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Regards
Deb

Two TT instances with same physical files

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