Use the case of the Cluster data without DRS storage store?

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• Good way to use the concurrent data store

  Hello

  I'm developing a multithreaded C++ application that uses the C++ of Berkeley DB Library.

  In my case, I have several databases that I composed in a wooded area. It is important for me to use an environment because I need control over the cachesize parameter.

  I don't need no guarantee of transaction and have for most of the readings, so I decided to use the "simultaneous database.

  I first pre-fill all databases with a number of entries (configuration single-threaded phase) and then work on it at the same time (for most readings, but also insertions and deletions).

  I tried all kinds of different configurations, but I can't work without specifying DB_THREAD as a flag of the environment.

  I don't want to because then access all handles is synchronized sequentially according to the documentation:

  "... Note that the activation of this indicator will serialize calls to DB using the handle between the threads. If

  simultaneous scaling is important for your application, we recommend handles separate for each thread opening

  (and do not specify this indicator), rather than share handles between threads. "

  (Berkeley DB QAnywhere C++)

  So I tried to open the environment with the following indicators:

  DB_CREATE | DB_PRIVATE | DB_INIT_MPOOL | DB_INIT_CDB

  All data in this environment handles are open only with the DB_CREATE flag.

  So, since my understanding this same basic access handles need to be synchronized, I opened separate handles foreach database for each thread (opening the handles is still single-threaded).

  In my first approach, I have only made use of the object of global environment. Which does not work and gives the following during operations error message:

  DB_LOCK-> lock_put: Lock is no longer valid

  So I thought, since the same handle global env is passed to all handles separate DB, it is perhaps a race condition critical on the handful of approx.

  So in my next test, I opened also handles separate EPS in each thread (and db handles owned each).

  That does not produce an error in db, but now it seems that each thread sees its own version of the databases (I call it stat early in the life of each thread and he sees all of the empty dbs).

  What is the right way to use the concurrent data store? Each thread should really open his own set of db handles? What about the number of open handles env?

  PS: Without specifying that the DB_PRIVATE flag seems to do the job, but for performance reasons, I want all operations to perform in the cache and do not specify product DB_PRIVATE average of several writes to the disk for my scenario.

  Thanks a lot for your help.

  CD (simultaneous database) allows a single editor with multiple drives, access to the db at a given point in time.    The handle for the writer doesn't have to be shared with readers.   If you share the DB handle then calls are synchronized, but if each thread has its own handle DB then this is not the case.     Since you have an environment, DB_THREAD must be at the level of the environment.   This will allow the sharing of the environment handle.     This type of error "DB_LOCK-> lock_put: Lock is no longer valid" you can provide us your code so we can take a look.   Also what BDB version are you using?

• Cannot use the bb data components

  Hello, I am a newbie. I recently moved from QtQuick to Cascades, now I'm trying to do some simple applications to start. I want to use DataSource {point in my application. I imported bb.data 1.0 in the main of QML, added bb/data/source data file in the file c ++ main. But when I try to use the qml data source, it gives me the following error: 'value of the default property of 'controls' Type mismatch. Waiting for bb::cascades:Control and found the source of data. ».

  Can someone hepl?

  The question is do you have set the DataSource as the first element in the container, without putting it in the attachedObjects. The container has a 'default' property that is a list of type Control and DataSource is not a subclass of control. Verify the data source examples in the docs and it should show how to use there... inside an attachedObjects: list [].

• remove the Cluster data store data store

  I have an infrastructure with vCenter and ESXi 4 5.5 I have a data cluster store in SAN with 8 Mon, I need to remove 3 Lun (to be used for other purposes) what is the appropriate procedure

  to remove the Lun (end then to destroy)? Thank you

  Do you want the LUN to use for purpose of non-vSphere? If so, you can just storage vMotion virtual machines since associated LUN data warehouses that you want to decommission (or simply putting the data store in maintenance mode, in this way, that the virtual machines will automatically be migrated). Cleaning after the data store, move the data store from the cluster data store, and then delete the VMware environment data store as described here: best practices: how to properly remove a unit number logic of a host ESX - VMware vSphere Blog - VMware Blogs

• Add the host Cluster in the Cluster data store

  How can I add host/HostCluster in the Cluster data store after the cluster data store is created. I know that we can add at this time, when you create the cluster data store, but how can we add it as soon as it is created?

  I think that as long as the new host has access to all the LUNS that comprise data warehouses in the cluster data store, then no further action is necessary.

  Make sure just that if using CF then zoning is configured correctly and the LUNS are not hidden from the new host.

  Also, make sure you restart the analysis for new data warehouses on your new host so that it can detect data warehouses

• Using the FN keys without flash cards

  Hello everyone

  I wonder if its possible to use the FN keys without toshiba flash cards on the top of the screen and therefore without having to install the value-added package?

  Some FN keys like brightness, mute, switch the display and sleep work without VAP
  but I also enabled WiFi, touchpad switch, mode switching power, buttons, which do not zoom

  Yet once, I don't want this utility to flash, still running cards and consumption of ram

  As far as I know something like this is not possible and if you have FN feature flash card utility must be running in the background.
  This along with the consumption of RAM is funny to me because if you turn it off you won't see any difference in the performance of the computer.

  Maybe you should disable some other background process unnecessary that you don't need.
  If you have the new model laptop with Win7 they have enough RAM for all operations and execution of flash cards will not have much influence on the performance of the computer.

• What value for p_print_server when you use the Rest Data Services as a print server?

  Hello

  I have my report server on the internal workspace defined as BI Publisher URL as default... It works for my BI Publisher reports.

  I have 2 reports who need to use the rest Data Services FOP engine and use GET_PRINT_DOCUMENT function Signature 4

  https://docs.Oracle.com/CD/E59726_01/doc.50/e39149/apex_util.htm#AEAPI146

  For these 2 reports, I need to pass a parameter to p_print_server. The documentation describes this as the URL for the print server

  My question is, how to find the URL for p_print_server when I want to use the rest Data Services FOP on ADR?

  I can not put as NULL as at the time, it will use the default BI Publisher URL and then these 2 reports will not work

  Moreover, when I put the server reports on internal workspace as 'Rest Data Services', my two reports work fine, but not when I put is as URL BI Publisher - which is necessary

  Help, please

  Concerning

  Matt

  Hi Matt Mulvaney,

  Matt Mulvaney says:

  I already have the correct configuration to be able to produce reports FOP including two steps you mentioned. This set works very well when I put the "Print server" preference in the settings of APEX Data Services Instance remains - and reports can be produced. But as I said, this must be set to a URL of BI Publisher.

  If you use "Print server" as "Oracle BI Publisher" then the p_print_server parameter would have been:

  http://myserver.mydomain.com:8888/xmlpserver/convert

  Where:

  • Printing of the address of the host server: myserver.mydomain.com (you can also use the IP address)
  • Print Server Port: 8888 (depending on what your BI Publisher Server uses port)
  • Print server script: / xmlpserver/convert

  Similarly, if you choose "Print server" as 'Oracle REST Data Services', the instance settings don't ask questions on the print settings, but internally it uses the following parameters and the p_print_server parameter is:

  http://myserver.mydomain.com:8080 / ADR / _ / fop2pdf

  Where:

  • Printing of the address of the host server: myserver.mydomain.com (host computer on which ADR is hosted)
  • Print Server Port: 8080 (the port used by what ADR/APEX Forum)
  • Script of the print server: / ords / _ / fop2pdf (this is not disclosed by APEX/ADR documentation, but as mentioned by Marc Sewtz in the following thread)

  Reference: Re: Apache FOP disappeared by Oracle APEX installable APEX 5.0 and 5.0.1 APEX

  Kind regards

  Kiran

• How to post JSON using the Oracle Data Service remains

  I use the regular (not NoSQL or something) oracle database with oracle rest data service. Now I need to post data / put wrote in the body of the request using some json/xml format, how to consume them using the rest data service, searching inside the express application?  important: using pl/sql block

  Also, I am on,

  Data service Oracle rest 3.0

  Oracle Application Express 4.2

  Post edited by: Jacynthe

  OK, I got the answer. At the express request, there is a link called body variable (: body in BLOB). but the BLOB data type. So, we have to convert that in other data, type what we in pl/sql. I've converted data type witch CLOB supports json.

• Y at - it a paper on how to use the map data the lookup value?

  I'm looking for a documentation where I could find information about the game of card data and how to use the map data configured according to look.

  Any help is very appreciated.

  I found a few threads on data cards:

  http://topliners.Eloqua.com/docs/doc-2434

  http://topliners.Eloqua.com/docs/doc-2817

  http://topliners.Eloqua.com/message/14058#14058

  Maybe that can help you get started

• Using the default date for a variable presentation

  In the report, I want to use the default date of the variable presentation.
  If I use the query as below, default is correctly.but if I pass the dash prompt date value that is throwing error
  
  Someone help me change the below
  request for valid results?
  
  TIMESTAMPADD (SQL_TSI_day, (dayofmonth(date @{asdf}{date '1900-01-01'}) *-1) + 1, date @{asdf} {date ' 1900-01-01'})
  
  Published by: user12255470 on December 2, 2010 12:11
  
  Published by: user12255470 on December 2, 2010 12:12

  Try this:
  TIMESTAMPADD (SQL_TSI_day, (dayofmonth(date '@{asdf}{1900-01-01}') *-1) + 1, date ' @{asdf} {1900-01-01} "")

  Mark answers quickly.

  J
  -bifacts
  http://www.obinotes.com

  Published by: bifacts on December 2, 2010 15:21

• How to extract data using the xml data type

  Hello
  I tried the following example using the xml data type, but not the desired output.
  could you please correct the query in order to obtain the necessary
  

  CREATE TABLE TEST.EMP_DETAIL
  (
    EMPNO       NUMBER,
    ENAME       VARCHAR2(32 BYTE),
    EMPDETAILS  SYS.XMLTYPE
  )

  Insert into EMP_DETAIL
     (EMPNO, ENAME, EMPDETAILS)
   Values
     (7, 'Martin', XMLTYPE('<Dept>
    <Emp Empid="1">
      <EmpName>Kevin</EmpName>
      <Empno>50</Empno>
      <DOJ>20092008</DOJ>
      <Grade>E3</Grade>
      <Sal>3000</Sal>
    </Emp>
    <Emp Empid="2">
      <EmpName>Coster</EmpName>
      <Empno>60</Empno>
      <DOJ>01092008</DOJ>
      <Grade>E1</Grade>
      <Sal>1000</Sal>
    </Emp>
    <Emp Empid="3">
      <EmpName>Samuel</EmpName>
      <Empno>70</Empno>
      <DOJ>10052008</DOJ>
      <Grade>E2</Grade>
      <Sal>2530</Sal>
    </Emp>
    <Emp Empid="4">
      <EmpName>Dev</EmpName>
      <Empno>80</Empno>
      <DOJ>10032007</DOJ>
      <Grade>E2</Grade>
      <Sal>1200</Sal>
    </Emp>
  </Dept>
  '));

  I need to get the record for Empid = '2'
  Then tried the following query with no expected o/p

  SELECT a.empno,a.ename,a.empdetails.extract('//Dept/Emp/EmpName/text()').getStringVal() AS "EmpNAME",
       a.empdetails.extract('//Dept/Emp/Empno/text()').getStringVal() AS "EMPNumber",
        a.empdetails.extract('//Dept/Emp/DOJ/text()').getStringVal() AS "DOJ",
        a.empdetails.extract('//Dept/Emp/Grade/text()').getStringVal() AS "Grade",
        a.empdetails.extract('//Dept/Emp/Sal/text()').getStringVal() AS "Salary",
        a.empdetails.extract('//Dept/Emp[@Empid="2"]').getStringVal() AS "ID",
        a.empdetails.extract('//Dept/Emp[EmpName="Coster"]').getStringVal() AS "CHK"
       FROM emp_detail a 
       where empno=7  
             AND a.empdetails.existsNode('//Dept/Emp[@Empid="2"]') =1

  Thank you...

  Karthick_Arp wrote:
  I'm not very good at that... But if your XML code should not be more like this

  SQL> Insert into EMP_DETAIL
  2     (EMPNO, ENAME, EMPDETAILS)
  3   Values
  4     (7, 'Martin', XMLTYPE('
  5    
  6      1
  7      Kevin
  8      50
  9      20092008
  10      E3
  11      3000
  12    
  .. cut ..
  

  Why? It is perfectly valid to data as attributes rather than elements and also quite common for key values.

• Impact on performance when you use the LONG data type

  Hi all
  
  
  Only I have a doubt about the use of LONG data type
  
  I use the data type LONG for some columns in a table and I created indexes on the columns separately, but these column values can be easily fit into the varchar data type.
  
  (Just to see the performance on this issue)
  
  Suppose that a common select query with WHERE condition on any of the column which has LONG data type will affect the performance of the query?
  
  Please explain.
  
  Thank you

  (1) the LONG (and LONG RAW) data types have been depricated for quite a while. Oracle has been strongly recommends that you move to 8.1.5 CLOB and BLOB data types. Why you use the LONG data type? You're still on Oracle 7?

  (2) have you tried to write a query that has a WHERE condition that refers to a LONG column? In general, you can not because it does not support the type of data LONG. For example

  SQL> ed
  Wrote file afiedt.buf
  
    1  create table a (
    2    col1 varchar2(30),
    3    col2 long
    4* )
  SQL> /
  
  Table created.
  
  SQL> select * from a where col2='abc';
  select * from a where col2='abc'
                        *
  ERROR at line 1:
  ORA-00997: illegal use of LONG datatype
  

  LONG data types are a royal pain to work with. They also have implications on the performance of wicked on the client.

  Justin

• Can I use the recovery CD without losing all my data?

  When I turn on my laptop satellite I get a message saying that the Windows system file is missing or damaged. The standard fix seems to be to repair using the Windows CD of Installation which of course I did not. I've also seen suggestions that sometimes chkdsk will fix the problem, but I can't run no more.

  The insert on the product recovery disc warns that all created files since I bought the laptop will be deleted. However, when I load the utility, I get two options. The first is to reinstall XP on my entire hard drive, and he told me that if I do that, I'll lose all my files. The second option is to install XP on a separate partition on my hard drive. He said nothing to lose all my data. Am I right in thinking that this second option will be to install XP, say, E: and I will then be able to run chkdsk on C:, or at least access C: and back up all my data?

  My deep gratitude for all the advice!

  Hello

  Sounds like you have an old Win XP Recovery disk

  Of general use of the Toshiba Recovery disk would be to format the whole HARD drive and therefore existing partitions will be deleted too I m not quite sure on the second option, you mentioned, maybe you would be able to choose a partition during the recovery process and would be able to install the operating system only on this partition without formatting the HARD drive but I m not 100% sure because it seems to be a former recovery procedure

  I would recommend another solution. You want to access the HARD drive to back up data. Right? Why you n start t Notepad using a Livecd such as Knoppix. In this case nothing would be installed on the HARD drive and the data on the HARD drive would not be affected so you can access important data and can move a HDD connected USB or flash memory stick

  After that, you can run the recovery procedure and might install Win XP on C.
  What do you think of this

• Unpack the cluster data channels

  Hi all

  I tried for this research, it seems quite common, but I don't know that I used the right set of words:

  I receive data from a device in the packages. Each sachet contains several images, each image contains two subframes and each sub-frame contains several data channels. In my vi, the package is a cluster, executives are clusters and the subframes are clusters, all the typedef' ed.

  What I want to do, is to take the big initial cluster and divide the data into a set of tables, one per channel data, without generating spaghetti.

  The function "decimate the table" would work great to do the job, but alas, it only works on the berries, no groups, and it seems that my group cannot be converted to tables.

  Is there something that I am missing? I have attached a photo of high level... Note that I'm not an artist. "N" and "m" values are fixed, so there is no variability

  By "append" do you mean "build the table? ' You can use "Cluster of Array" instead?

  Also note that if you have a cluster where the latter are the same, regardless of how many nested groups there, then you can Cast from Type to an array of this type of final element. For example, if all data real of your cluster is single precision floats, you can the Type Cast to an array of SGL.

  If you can upload a screenshot or your code saved to an earlier version, I will try to provide more specific help.

• Satellite A200: Can I use the recovery disc without wiping the drive

  I read the threads on this forum, but I did not come with an exact answer to my problem.

  With my regular PC, I got a disc of Installation of Vista, which is also a recovery disk (like that could do with XP). One of the most useful things is that when you start from the disc you have an option to "fix" the system, which means that all the vital files (such as the bootloader...) will be restored, but otherwise all data will remain. This is extremely important when for example you install a dual boot with Linux, when often Vista refuses to start and to repair the boot loader has solved the problem. Of course it can easily and quickly fix all kinds of other problems in the system as well.

  My laptop Toshiba A200 (otherwise a wonderful machine), came with the Toshiba product recovery disc. From everything I read on the forum and what he says on the disc itself, I understand that it only allows a total reinstallation of the system, set at the factory, wiping your drive and everything on it.

  Toshiba really leaves us without a 'repair' option '?
  I find that quite amazing, because after all, I paid for the Vista operating system, so why shouldn't I get the options I would have if I had an original Vista disc?

  If all the above I have is right, it means that if I want to install a dual boot with Ubuntu and would get a bootloader problem, I loose all my data when I have to repair the boot loader? (A problem which, with the option 'fix', takes only 5 minutes to fix!).

  I would like to hear reactions, solutions, suggestions or alternatives.

  Thanks in advance,
  Yossi Beck

  Hey Yossi

  I think you have misunderstood something!

  You received with the image of Toshiba Toshiba Recovery CD! The image contains drivers Vista OS, Toshiba, tools, utilities, and additional programs!

  Please don't compare this disc for the original CD of Microsoft Vista and don t mix it!

  So using this disk, you can set the laptop back to factory settings!
  This is very useful because this procedure takes about 10 minutes only and you get everything functioning OS with all the drivers, tools, etc.

  Please note that no all users and customers who buy these phones are technicians and scientists ;) but simply newbie and such possibility of recovery is always welcome!

  but the use of this recovery CD format the whole HARD drive and erases all partitions.
  That is why it s advisable to back up the data before using the recovery CD/DVDs