TimesTen In-Memory :: Multiple Active Standby Pairs On Same Pair Of Hosts
Dec 25, 2012
I have already created an active standby pair(without cache group) and managed by Oracle Clusterware and it work fine.
Now ,I create another DSN and I also want to create another active standby pair on the same 2 hosts.
I try to setup and reference this setting:
[URL]...
But I get error message in ttcwmessage :
TT17013 The default hostname cannot be set to host_name because a local host of host_name is currently in use
Is it possible that I can create more than one A/S pair(with different DSN) ? Or any other solution? !
TimesTen version:11.2.2.3.3 (64 bit Linux/x86_64)
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May 23, 2013
Can i know the internal process of initialization of DB into memory in timesten , when a new connection is establishing? Will timesten create tables and indexes in RAM when first connection is established if the RAM policy is default?
want to know the internal functional flow of timesten when any command is fired against it.
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May 2, 2013
As per my understanding , Timesten or IMDB Cache can be connected through DSN by any external client. Want to know whether Radware can be integrated with Timesten or IMDB Cache.
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Jul 18, 2012
I connection to TimesTen as follow:
String url = "jdbc:timesten:direct:dsn=my_ttdb";
String username = "ADMINISTRATOR";
String password = "";
Connection connection = DriverManager.getConnection(TestTT.url, TestTT.username, TestTT.password);
I wonder if this JDBC Connection is a TCP/IP connection on the backend? If this is not a TCP/IP connection, how can I make a connection with TimesTen via TCP/IP protocol?
dsn:my_ttdb configuration likes:
[my_ttdb]
Driver=/home/tttest/TimesTen/tt1122/lib/libtten.so
DataStore=/home/tttest/ttdata/database/my_ttdb
LogDir=/home/tttest/ttdata/logs
PermSize=40
TempSize=32
DatabaseCharacterSet=ZHS16GBK
OracleNetServiceName=orcl
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Oct 24, 2013
I'm using TimesTen Release 11.2.1.9.8 (64 bit Linux/x86_64) 1. is there any limit in size for a single table. How much a table size can be increased? 2. Is there any limit in number of records in a table?
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Jun 28, 2013
,Im having following replication scheme: M1,M2 and M3 are multimaster replicated datastores.These three datastores will replicate its data to a node which is going to act as a Propagator.The Propagator will then replicate data to a set of subscribers. Question:-------------
Can we configure the Propagator to be redundant.ie, can we configure an additional propagator which will act as redundant and replicate to the same set of subscribers?
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Sep 2, 2013
We cache oracle 11g2 data in timesten 11.2.2.5.0 ( IMDB ) We can't find any trigonometric functions like cos(x), sin(x) or so in timesten. Does that means timesten doesn't support trigonometric functions?
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Oct 9, 2012
The document says "Propagators are also useful for distributing replication loads in configurations that involve a master database that must replicate to a large number of subscribers".
Link [URL]........
My question is how do we define this " large number ". Is 5 a large number or 10 a large number ? I've a bidirectional legacy replication scheme wherein a node replicates to 10 other nodes. Should i introduce Propagator between these nodes.
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Jul 22, 2013
Is it possible to use TimesTen to create cache groups that have different table structures from original Oracle tables based on relational conditions?
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Mar 12, 2013
We have been using XLA to capture events on TimesTen for a while now without any issues. We were on TimesTen 7.0.5 and then moved to 11.2.2.3.0 and now 11.2.2.4.0. The XLA processes used Java 6 64 bit and works well with TimesTen versions 11.2.2.4.0 - 64 bit and 11.2.2.3.0 - 64 bit, without any issues.
However, we recently upgraded to Java 7 64 bit both during build time of our XLA processes as well during runtime. The problem we see now is that XLA process upon startup processes events for a while and then after that doesnt receive any events. The process doesn't throw any errors/exceptions. If we restart the XLA process, all the unprocessed events are received and then it behaves normally for a while after which it fails to receive any further events.
Is there any issue with Java 7 64 bit and the TimesTen XLA API? I read the TimesTen 11.2.2.4.0 manual and it says that Java 7 and the ttjdbc7.jar have been certified to work well. Was just wondering if there were any other issues.
In addition, to debug the problem, we ran XLA on a single node and on a two safe setup. The same observations are noted. On Java 6, the process runs just fine capturing all events without any issues, but with Java 7, the issues persist.
In addition, we are only performing updates/inserts on to TimesTen, no delete actions. The OS on which TimesTen's and XLA runs is Red Hat Enterprise Linux Server release 5.7 (Tikanga).
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Jun 13, 2012
I would like to have a query which should fetch previous day records from column which is having timestamp data type.
select mdn from user_table where updatetimestamp > trunc(sysdate) - INTErVAL '24' HOUR;
But this gives output not for previous day, but all records which are 24 hrs less than current day. How to get records for previous day based on column having timestamp data type.
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Sep 24, 2013
We are trying to execute a statement SELECT CURRENT_DATE FROM DUAL on Timesten 11.2.2 . It throws error unknown referenced column error. Command> select current_date from dual; 2211:
Referenced column CURRENT_DATE not foundThe command failed. But the following doc shows the support.
TimesTen PL/SQL Support: Reference Summary CURRENT_DATE function
Returns the current date in the session time zone. YIn TimesTen this returns the current date in UTC (universal time). TimesTen does not support local time zones.
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May 3, 2013
we want to truncate a oracle Table in the Oracle DB. After the truncate the fact table will be loaded again. After the new load in the fact table we want to tell the times ten db to refresh the cache table. The cache Table is a user owned read-only cache group with no autorefresh. We want to tell times ten in a PL/SQL Block from Oracle DB that starts the refresh from the cache group in times ten. The refresh should not be a autorefresh because the refresh should only start if the fact table will new loaded after the truncate.
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Dec 13, 2012
I want increase speed of importing data using ttisql. My script contains about 12k simular MERGEs. Can I prepare this state,ent once and later substitute params from script?
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Nov 24, 2012
For applications and Timesten databases on the same server we can use direct model to gain the base performance. But I want to know that how big heap size of JVM to be set for my java application when enabling direct model?
Does my application need more head memory when direct model than other local communication protocols, such as Unix domain socket or IPC? Supposing my Timesten database takes 12GB memory from OS, does it mean I need specify the same size for JVM heap(-Xmx12G)?
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Nov 16, 2013
I installed timesten server and client on different machines in LAN, but with the same user and group - ttadmin:ttgroup When I tried to connect to server with ttisqlcs -connStr "DSN=sampleCS"The output gave me error messages as below connect "DSN=sampleCS";S1000: Failed to retrieve IP address of the system. System error: -2The command failed.Done. The related part in sys.ttconnect.ini is set as below
[192.168.0.206]Description=TimesTen ServerNetwork_Address=192.168.0.206TCP_PORT=53397
And the
sys.odbc.ini [ODBC Data Sources]sampleCS=TimesTen 11.2.2 Client Driver [sampleCS]TTC_SERVER=192.168.0.206TTC_SERVER_DSN=nredb_ds
What does it mean by "retrieve IP" ?Does it try to resolve IP by the hostname even when I already gave it the ip address?By the way I can ping 192.168.0.206 and telnet at port 53397 with no problem.
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Oct 29, 2012
try to evaluate it as IMDB cache.I am facing this error repeatedly. I have increased perm size from 6.25 GB to 10 GB.After inserting about 460.000 rows I get the error again. Is it possible that 460.000 rows need 3.75 GB space?
In Oracle database these rows occupy about 200 MB space.
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Jan 25, 2013
I have a problem with executing oracleCommand.ExecuteReader() method. Whatever I try it always returns null and it won't create OracleData reader object. I'm using ODAC 1120320_x64 for .net 4.0 and timesten112241.win64. Don't sure what to do. Debugger is showing strange thing in OracleConnection object : ConnectionState = Closed, but output of ttStatus shows connection to TimesTen data store and ExecuteNonQuery() command works just fine with or without (in or out) parameters. But when I try to execute some query with multile output such as select *, I can't get any result.
I also have a strange problem with connection.Open() When I execute Open() i throws AccessViolationException that can be handled with [Handle ProcessCorruptedStateExceptions] attribute, but connection is established after that and my application works fine until I try to instance OracleDataReader object.
Here is the code:
OracleCommand select = null;
OracleDataReader reader = null;
select = new OracleCommand(selectStmt, connection);
select.CommandType = CommandType.Text;
try
{
reader = select.ExecuteReader(); // this line throws NullReferenceException
if (reader.HasRows)
{
[code]....
Just to mention, I tried it with different queries (pl/sql, plane sql, stored procedure) and all of them works fine in SQL Developer, but not in app.
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Jul 10, 2012
I have some question.
TTversion : TimesTen Release 11.2.2.3.0 (64 bit Linux/x86_64) (tt112230:53376) 2012-05-24T09:20:08Z
We are testing a AWT cache group ( with CacheAwtParallelism=4 ).
Application(1 process) to the DML generates to TimesTen(DSN=TEST).
At this point, Are delivered to the 4 parallel DML?
[TEST]
Driver=/home/TimesTen/tt112230/lib/libtten.so
DataStore=/home/TimesTen/DataStore/TEST/test
PermSize=1024
TempSize=512
PLSQL=1
[code].......
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Sep 26, 2012
We have 10g physical standby set in our environment and we are migrating to 11g now. We want to use the active data guard feature of 11g to run the live reports on standby rather production. Questions I have is:
1) On our current 10g standby environment, we use db_name=cusms which is exactly matching with the production database name. I don't see we are using database_unique name on our standby. But I have read several blogs where everyone talks about using db_unique name on standby and db_name can be exactly matching with production on 11g. I wanted to know, is db_unique name a new requirement to have on 11g? can I go ahead and not use db_unique name and just have db_name exactly matching with production? What are the implications of doing so? The reason we want to stick to this is in-case of failover we want the database name to be the same. But I want to hear your thoughts on this:
2)While building standby, I did noticed few things and want your clarifications:
a.On standby database, should I mount instance using pfile or spfile or it doesn't matter?
b. Lets say if I use either spfile or pfile, can I just have db_unique name in that file and just start the instance in no mount and do the duplicate from rman?
c.As soon as my duplicate target database for standby from active database got finished, I usually exit the rman session and go to sqlplus and shutdown the standby instance. (Is this ok to do)
d.Then I start the standby instance with startup (mount and open the database) this should open the standby database in read only mode. Following I issue alter database recover managed standby database using current logfile disconnect to put the database in recovery mode. (any steps missing here)
e.Then go to primary and do few log switches and come back to standby to see if the primary changes moved to secondary or not.
But what I have observed is:
a. When I do the duplicate it runs successful. But during the course of duplicate, primary system generates few archives which are not shipped or applied on standby. When I go to standby to recover the database, it says media recovery needed and ask for archives files. I need to manually move this files from primary to standby to apply. Isn/t this automatically taken care?
b. I also noticed after I can not open the standby database in read only mode after the duplicate command. While trying to open, it says database media recovery needed. What's the best procedure to open the database in read only mode immediately?
c. On my standby init.ora lets say if I use db_unique name, where would my control file be place? Will oracle create controlfile from primary and put it on my standby database and put an update an entry into my pfile or spfile?
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Oct 17, 2012
We are planning to create physical standby database for 4-node RAC primary to a 4-node RAC standby using Active database duplicate with ASM and OMF
1. while using active database duplicate, do we need to set cluster_database=FALSE in spfile clause and create standby,next change it back to TRUE at standby. Or we don't need to touch it. And also do we need to include instance_number parameter
2. We are using OMF, can we use log_file_name_convert parameter in spfile clause of duplicate. Documentation says log_file_name_convert cannot be used if standby is going to have OMF. Because we have 5 groups for each thread, which are on 5 different disk groups. When standby is created all the logs are created in only one disk group pointed by db_create_online_file_dest_1.
3. To enable force logging at primary do we need to shutdown the database?
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Feb 8, 2013
In DR site. i have to clone the database from pshysical standby database and clone db will be normal db not standby. Is it possible to do rman duplicate from active dataguard? will it support the duplicate database from active database or i have to take the rman backup of standby database and duplicate from backup piece.
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Dec 21, 2012
creating the standby database from Active database using RMAN and getting the below issue after i executed the duplicate command.
Version of Database:11g(11.2.0.1.0)
Operating System:Linux 5
Error:
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 12/21/2012 17:26:52
RMAN-03015: error occurred in stored script Memory Script
RMAN-04006: error from auxiliary database: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
[code]....
provide any work arounds to proceed further in creating the standby database.
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Oct 17, 2012
Controlling User Access to Tables in a Logical Standby Database can be controlled using the following command:
ALTER DATABASE GUARD STANDBY;
My simple question is: how can I know the current active Guard setting in the standby database?
Oracle 11g R2.
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Aug 23, 2010
I have failed to duplicate target db for standby from active db using spfile with the following errors:
RMAN-03009: failure of backup command on prim1 channel at 08/11/2010 05:25:09
ORA-19558: error de-allocating device
ORA-19557: device error, device type: DISK, device name:
ORA-17627: ORA-01041: internal error. hostdef extension doesn't exist
[Code].....
The script has successfully created on standby db all controlfiles and also has copied 2 data files DATA01.DBF and DATA02.DBF into the correct location. Then the errors above kicked in and stopped the rman dup process.
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Mar 11, 2011
I am trying to compare the ranges of low pair and high pair,if they are within the range then source_conn_id should remain same,else it should be updated to null,which i had written it in else block.How can I implement the IF block and what to write in that block so that source_conn_id can remain the same.
SQL> CREATE OR REPLACE PROCEDURE fp_complements_src(p_id varchar2,ftr_con_id varchar2)
2 AS
3 BEGIN
4 FOR i IN(SELECT SOURCE_CONN_ID,LOW_PAIR,HIGH_PAIR FROM COMP_TEMP1 WHERE SOURCE_CONN_ID=ftr_con_id)
[Code]....
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Aug 16, 2013
I have a SP for comparing 80 diff column values in 8 table pairs and it is taking a huge lot of time to process as I have to process around 10k records.
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Oct 15, 2013
I am getting starting with rac environments. I need to configure a two nodes active/active with rac and I need to know if always using rac both nodes will be active or if I have to do that at some point when installing. I have reading some docs from oracle and others authors about rac and its configuration process but that is not understood for my yet.
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Oct 8, 2012
I have one production server with oracle 11g R2 DB. I have to change Server Hardware and thats why I have to install oracle 11g R2 DB on New hardware and test it. I had installed DB with software only option and copied the cold backup of production server. The hostname and ip address of both the servers are different. I had change the "db_domain" parameter into init.ora with the hostname.Now my question is that can the same db runs on the same network with different hosts. Change of "db_domain" parameter into the init.ora is enough or i have to follow some other procedure.
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Jul 25, 2012
We are using oracle as database in our application. For high availability we have a cluster of multiple nodes and the data is replicated using oracle streams. All the nodes in the cluster are active. We do not have any concept of stand-by.
Now we are planning to use oracle RMAN for backup and recovery. RMAN user's guide doesn't recommend any strategies for such deployments. It mainly focuses on primary/stand-by deployments.
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