Secondary databases in the Berkeley DB

Please, can you help me with the following situations?



I loaded about 18,500,000 records into a single primary database and approximately 12 500 000 records in another. It took about 6 hours to load the data and write data files: is this normal?


Now, I need to define the secondary databases during these two primary databases: what I have to load all the data again or I can build the secondary databases on the loaded data?

Thanks in advance for your answers!

Hello

>

I loaded about 18,500,000 records into a single primary database and approximately 12 500 000 records in another. It took about 6 hours to load the data and write data files: is this normal?

It may be normal. If you do not need guarantees of sustainability during the loading phase, you can try to load the data without the use of transactions (and logging); Thus, you avoid the necessary I/o to write the records of the newspaper in the logs files and the slight overhead of initialization and complete transactions. In addition, you can benefit from bulk write data: bulk updates
At the end of the loading phase, you will need to stop and close environment, make sure that the databases are compatible via db_verify running and make a backup for them. When you restart the environment for regular use (non-charge ops) you will initialize the logging subsystems and transactional (DB_INIT_LOG, DB_INIT_TXN).
Also, you can improve the performance of writing in pre-sorting of data before loading (according to the order of the function of the key comparison that you defined for the database, or lexicographical order if you have not defined a - applies to Btree and hash access methods).
Additional pointers on how to deal with the load, in both cases, when you make this transactional mode or not, can be extracted from here:
Writing to the database records
The Page size setting
Selection of the size of Cache
Tuning to access method
Setting of the transaction

Now, I need to define the secondary databases during these two primary databases: what I have to load all the data again or I can build the secondary databases on the loaded data?

You can create secondary from scratch, without the need to load the data all over again. See the DB_CREATE flag for the Db::associate() method.
Note that in a transactional environment, the creation of the secondary index is executed in a single transaction. It is therefore likely that you might meet ENOMEM as errors. In this case try opening the environment without initializing the transaction subsystem (DB_INIT_TXN), wait for the creation of secondary to fill, data bases close environment, as well as restarting it with on transaction.

Kind regards
Andrei

Tags: Database

Similar Questions

  • Databases that use the Berkeley DB

    Hello

    Is there a SQL database that uses Berkeley DB Java Edition as the storage engine? If so, could you please point me to them?

    Thank you
    Wait.

    None that I know.
    -mark

  • Create a secondary database for primary existing

    Hi all.

    I have damaged the secondary database (index) and you want to recreate. How can I do this if possible?

    For example without modifying or creating a new primary database.

    Thanks in advance.

    P.S. I used C++ API of BD

    Hello

    I think that you can use in the following way:

    1. close the two primary and secondary databases.

    2. remove the secondary database.

    3. open the primary database.

    4 open the secondary database and associate it with the primary database with DB_CREATE.

    Kind regards

    Winter, Oracle Berkeley DB.

  • How to "client-side includes for secondary menu on the page.

    Hello.

    Returns the next page: beginning of trial project page

    The linked page is actually a glimpse of a tmp DW CS3 file, for this reason that the CSS has been fired by DW in the html file, it will not look like that in the possible swap file.

    After long battles with the Spry Horizontal menu, I finally resorted to Pop Menu Magic 2 (PPM2) to generate menus. I am very happy with the product (I don't mean support PPM2, but prefer support regarding the menu CSS in General related to caching-based). I started with a single main navigation menu, which was very complete - but also very large (ito file size). I was hoping to cache part of the menu on the client side to reduce the download time once the site visitor download the first page of the site (where it enters the site is not applicable). But this proved impossible (I think...).

    Then I followed some advice for break up of my main navigation menu, keep only the most important things in there and instead distribute the lower levels of the main menu in their own dedicated menus. From there, the page linked above.

    Main menu at the top is fine, no problem. On the left under the mast-head, I created two menus, one on the other (it displays as a single menu but the first menu point ends above the "another turn lists"). The first of these two menus contains most of the heavy elements of navigation (±160kb of total page of 220kb file size). The div info that applies to this menu = < div id = "p7PMM_2" class = "p7PMMv06" >. I'd love to cache this menu, either all or the major part of it, on the client side. Which is to put an include implemented on the client side. When a visitor first enters our site include with the menu file (secondary) 160kb gets downloaded and CSS style sheets, etc. When the visitor connects through a next page in our site, his machine (client side) dishes on the menu page without having to download it again from our hosting server.

    Is this possible and how? Any suggestions will be appreciated!

    Our clients are mostly wealthy and so probably (almost) all have high-speed broadband connections. I seriously doubt that none of them are running with dial-up connections. Thus, this issue will not sink our site. But I'd like to reduce the file size of page if possible.

    Furthermore, I'm not too worried about the small amount of visitors who may have their javascript disabled in their browser. The main navigation at the top of the page menu again will allow them to navigate the site. Much, it goes same for SEO.

    I tried one or two CSI javascripts and managed to actually do the relevant tags and content inserted into the html document, but the javascript would be "breaking." That's all the coding and menu content would be, but javascript does not work (menu will not pop / fly-out). I'm a little clueless when it comes to Javascript and many other things :-), but I suspect that the Javascript code into the include file is not called. If the Javascript code is stored in the HTML, the content of the menu (items) in the include file comes in the html file after the relevant script was called and be rendered?

    Once more any help / suggestions will be appreciated!

    Tuesday, March 17, 2009 21:27:59 + 0000 (UTC), "afrilux".
    wrote:

    >.. What is more or less the advice of Gary, as well as a few others. I realize
    > It is very good advice. It's the kind of advice that lead me to carve up the
    > intial 'all-in-one' menu in a menu main nav and the secondary menu on the
    > left.

    It's more or less what I suggests to me. The main menu contains the
    various categories. In each of these categories, you may have the
    under categories for this category. Some of these subcategories
    could have other subcategories below them.

    The idea is a bit like a wizard that guides a user through a complex
    Configuration. If you present the user with too many choices at the same time, it
    is a bit overwhelming and just leads to indecision, which means they could
    choose to do nothing. If you present with little choice, he
    is much easier for them to make a decision. This decision would lead to their
    a little more choice, etc. until they chose what they want.

    So that this kind of thing, especially with as many rounds you have,
    request to the database, a database in not absolutely necessary in order
    to adopt this approach.

    And just FYI, it is impossible for the part of a page cache. You can cache only
    entire folders. There is no such thing as an include client-side. Includes are
    see all as a single file on the server and the browser. The
    only way to hide something as your menu would be to use images. Who,
    of course, brings us to much more difficult. The first would be that of the menus
    cannot cross the borders of the image. Then there are questions of usability
    with the images. Those things that really make a wise choice.

    Gary

  • free issue of the berkeley db memory?

    Hello:

    I use berkeley db on C, version is V4.7
    When I press about 5000 pair key/data in berkeley db,
    I find the free memory down a lot. Yes, I can understand
    This point because maybe the pair key/data push need a lot of memory.
    but when I delete all 5000 key/data pair, I hope that the free memory
    to restore the original condition, but I still find down memory free.
    Finally, I try to close the database, I find the restoration of free memory
    State of origin.
    So I think that insert and delete (maybe looking) will consume
    memory in some cases. Only memory will be released if full database
    is closed.
    but I want to question: is it possible to free the memory noused
    but do not close the database? I don't want to open and close the database
    frequently.
    Thank you

    Hello

    Yes, the DB-> close method will purge any cached data base
    information on the disk, close all open cursors open, free of any
    resources and close the underlying files.

    The question, "is it possible to compact databases
    and return unused pages in the database to the file system"
    in the Berkeley DB FAQ at:
    http://www.Oracle.com/technology/products/Berkeley-DB/FAQ/db_faq.html#20
    also addresses the use of the DB-> compact that can help
    achieve what you want.

    Thank you
    Sandra

  • Can I set up a secondary monitor to the HD on my iMac mid 2011

    Can I set up a secondary monitor to the HD on my iMac mid-2011 with no problems. I cannot afford to upgrade to the new iMac 27-inch and wanted to update my monitor.

    Is this possible on the Mid 2011 iMac?

    Yes.

    Your best option is to choose a good monitor that has Display Port or DVI input and shy away from those who only have HDMI and VGA input.

    For a display Port monitor you will need a Mini Display Port to Display Port cable if it is not provided with the monitor.

    For a DVI monitor you will need to a Mini DisplayPort to DVI adapter and a DVI cable.

  • Schema of database for the processing of the results

    Hi all

    I have a question on the results of teststep registration in the database. I use the generic recordset as my database for the recording of data.

    In my database (SQL Server), there are the following diagrams: dbo, dbtest1, dbtest2. I created all the tables of results (UUT_Result, Step_Result etc...) of the generic Recordset object in all schemas. Therefore, to display the results in the table of Step_Result, I specify the schema as well as the name of the table, for example SELECT * FROM dbtest1. Step_Result.

    Is there a way to tell Teststand to save the result in another schema (dbo, dbtest1, dbtest2) programmatically?

    Yours sincerely,

    chati

    Yes, the tool is easier to visualize what makes SQL. A user can access patterns as much as they have permission for. The problem is that, in order to specify the schema, you must assign the rating on your SQL commands. I don't know of an easy way to do this in Teststand.

    If you manually create the SQL commands is noted:

    [Database]. [Schema]. [Table]

    It is easier to implement multiple user names and to use the default schema to define.

    You can also have a database that is different for each category of journaling (and no need to use patterns at all).

    A lot of good information here:

    https://TechNet.Microsoft.com/en-us/library/dd283095 (v = sql.100) .aspx

  • Try to migrate Ultiboard user database of the 11 to 12 worm

    I updated my software to Ver 12 and noticed that my user database have not migrated. Then I copied my worm 11 critical db space worm 12 and restarted Ultiboard. On call for Ultiboard, I received a diagnosis indicating that my user database was the wrong version and that it would not be usable. So, how can I migrate my database to the user, and why was it not this part of the update process in the first place?

    Hello smh55,

    Tools > database > convert the database should do the trick...

  • Exception occurred in the Microsoft Access database engine: the field is too small to accept the amount of data you attempted to add.

    Hello

    I try to save a path in a table in an access database, but an error occurs:

    "Exception occurred in the Microsoft Access database engine: the field is too small to accept the amount of data you attempted to add." Try insert or paste less data. "in create a NI_Database_API.lvlib:Rec - Command.vi-> NI_Database_API.lvlib:Cmd Execute.vi-> NI_Database_API.lvlibData.vi B tools insert-> project total.vi.

    I've attached a JPEG of a part of the code and the code, but it won't work because the database is not attached,

    any help please?

    Ok

    I solve the resized problem.i column size

    Thank you

  • Adjust the data in the database with the variables

    Hello

    For my internship, I have an assignment to read and set a database with the variables. This SQL server 2005 database contains variables of a controller. These are read and write variables. The assignment is to display the read variables and the user can adjust the variables of Scripture. The first part was "easy" because the forum contained a lot of examples of this. The second part is more difficult because the forum contains absolutely no example of this. Can I use LabVIEW 2010 and 2011, and also I downloaded the 30 day trial of the database connection tool. If it's useful, I can recommend my company to buy this package. Playback vi makes use of a UDL (Microsoft data link) connection.

    So you guys my question is: is it possible to adjust the specific variables in a database using LabVIEW? And maybe you can give me a little advice on this topic...

    Thanks in advance!

    Roy

    In SQL, the specific data are always selected with the keyword WHERE. In VI to update there is a link for options, you can for example add a constant 'WHERE id = 1457 and measure > 0.54 ".

    You can ofc. also build this chain through controls, settings and other means.

    If you prefer, you can use the Execute Query (under Advanced tab I think) to which you can send the complete query example "TestTable Update set name ="Zeus"where id > 14 and id.<>

    /Y

  • Error on the server after restoring the backup: "could not allocate space for object database because the 'primary' filegroup is full.

    Original title: Hi Experts,

    Hi Experts,

    Pls help me...
    When I tried to restore the backup of one of my site in my server, I got error like "cannot allocate space for object database because the 'primary' filegroup is full"... Microsoft SQL-DMO(ODBC SQL State:42000))

    Hello

    The question you have posted is related to professional level support. Please visit the link below to find a community that will support what ask you:

    http://social.technet.Microsoft.com/forums/en-us/category/SQLServer/

  • Error blue screen "a clock interrupt was not received on a secondary prossesser in the allotted time interval.

    I get a blue screen that says that this A clock interrupt was not received on a secondary prossesser in the allotted time interval

    * original title - an interruption of clock has not received on a secondary owner in the amount of time allocated Windows stops and I get a blue screen that says this *.

    It is likely that your CPU is a failure.

    However, before replacing, try this

    1. If you are overclocking the processor, back to normal speed
    2. To avoid overheating, get a can of compressed air and dust out of your computer
    3. Go to the website of the manufacturer of the computer, download and install the latest drivers and BIOS for your model
  • Want to know primary and secondary configuration to the call, Manager with the voice gateways

    Hi all

    Hope you all are doing well, I wanted to know that we have two other PRI service provider and we want one of them are primary and secondary schools on the other. We have two supplier dedicated 4-4 finish lines. Please provide me with the part of configuration that are required in this case and how to re a SP for primary education and another SP for secondary lines.

    Thank you

    Arjun keita

    Hello Arjun,

    For the full bridge configuration you can check the guides below, but for the PRI redundancy, you create dial-peers and specify the feedback:

    https://www.Google.co.in/URL?SA=t&source=Web&RCT=j&URL=http: / / www.cisco...

    Voice POTS dial-peer 1

    Destination-pettern 0 t

    Port 0/0/0:15

    Preference 0

    Dial-peer voice 2 pots

    Port 0/0/1:15

    Preference 1

    Dest-model 0 t

    Dial-peer voice 3 pots

    Description incoming only

    Incoming called-number. T

    Direct inward dial

    Aseem

    (Please rate if useful)

  • Database in the resources folder

    I have a SQLite database with the names of 100 countries and their info from lat - lon.

    I want to put this folder resources and read/edit its entries.

    Is this possible? If Yes please tell me how?

    I know how to create and manage the database on SD card, but want to know how to place the database in the application.

    Help, please...

    you have two options, actually.

    Copy the runtime of your db for location of SD card file or copied to the file system internal. The last option is useful only for a limited number of device. Bottom line is that SQLite can work on SDCard or filesystem (in rare cases)

  • ACS 5.7 - access to tracking and reporting on a secondary server to the primary server

    My organization has an ACS deployment, consisting of three servers. Currently, the primary ACS server is also the newspaper collector. However, Cisco recommends to a secondary server in the log collector.

    I noticed that I have connection on the secondary server and click on "Monitoring and reporting", I am prompted to connect to the main server because that's where newspapers. I guess if the newspaper collector is on the secondary server and I click on "Monitoring and reporting" of the main server, I will ask you to connect to the secondary server.

    Is there a way of not having to connect twice (once to access the web interface and new access reports)? It seems that deployment of ACS should support a kind of function of single sign-on and once you are connected to a server, gives you access to another without having to log in again.

    Hi David,

    I know that the Cisco documentation mentions the school be the best practical paper collector, however, which in fact means is that the server acting as collector of newspaper should be not authenticate users.

    If your backend is the collector of newspaper that should be fine, as soon as it's not authenticate users (but secondary responds to this task).

    And related to the shift, that of right, independently on the server to which you connect, once you click on "Monitoring and reporting" you will be redirected to the collector of the newspaper and need to connect in it, unless you are currently on the newspaper collector and click on 'tracking and reports.

    SSO between servers would be a good thing but is not available.

    Note: Please mark as answer as appropriate

Maybe you are looking for