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  1. Replies
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    Sticky: Hello, What about: ACID transactions ...

    Hello,

    What about:


    ACID transactions
    snapshots
    Commit possible only on Engine level?

    I didn't find any info about these things in change log post.
  2. Replies
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    33,156

    Then question what standard open source license...

    Then question what standard open source license you will apply? As I know there is no possible to be open source only for non-commercial purposes and with patented algorithms.... You will apply your...
  3. Replies
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    If I understand correct STSDB W4 won't be open...

    If I understand correct STSDB W4 won't be open source anymore ?
  4. Replies
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    I would like to ask, what is status of STSDB...

    I would like to ask, what is status of STSDB version 4 development?
  5. Replies
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    It would be good receive some version4...

    It would be good receive some version4 architecture descriptions. How data storage structure was changed in general? How wasting space problem was solved? How native MTL in new version will work?...
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    Blaze, in STSDB W4 will be native multi threading...

    Blaze, in STSDB W4 will be native multi threading level, so I don't see any reason to include MTL there. But in STSDB R3.5 would be good to have MTL included.
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    Hello, MTL and custom data compactor are...

    Hello,

    MTL and custom data compactor are intresting features.

    Just few comments from me:

    1. There is benchmarks done for STSDB in Benchmark | W-tree vs. existing technologies
    I would like...
  8. Replies
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    STSDB Version 4

    I would like to ask about STSDB release 4, with all promised improvements. What is your plans about it?

    Regards,
    Saulius
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    Thank You it is very simple and useful. And You...

    Thank You it is very simple and useful. And You really need STSDB documentation :)
  10. Replies
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    Data Update in Compound Key

    Hello,

    How to deal with situation when need update field in compound index?

    Example:

    Data Record


    public class Person
  11. In general once again. I see 2 disadvantages...

    In general once again.

    I see 2 disadvantages with wasted space in STSDB, which should be solved:
    1. Small transactions commit issue. It is not possible to avoid small transactions
    2. Not enough...
  12. Thanks for explanation, now looks like more...

    Thanks for explanation, now looks like more clear, but your suggested solution with copying records to new table is not good, because it takes too much time and resources. Anyway I am waiting your...
  13. Additionaly: For example if I have 10 tables...

    Additionaly:

    For example if I have 10 tables and for every table set CacheCapacity = 8192 (default). Data record class size is 40bytes. It is mean that total max tables cache amount can be 8192 x...
  14. CacheCapacity and data compression relation

    Hello,

    I investigated that CacheCapacity is linear related to data size.

    if cache is small very often apears cache overflow, then compression is very poor in this case.

    For example with...
  15. Replies
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    It is possible situation (theoretically) , when...

    It is possible situation (theoretically) , when in STSDB key exist, but data for this key does not?
  16. Why in output apears "Gain" provider? In example...

    Why in output apears "Gain" provider? In example query you entered only "eSignal" as provider:


    var fromKey = new XKey<DateTime, string>(now.Date, "eSignal");
    var toKey = new XKey<DateTime,...
  17. Just to clarify your answer. DateTime is stored...

    Just to clarify your answer. DateTime is stored as LONG number and when you searching key by


    fromKey = new XKey<DateTime, string>(DateTime.Now.Date, "eSignal");


    STSDB engine will return...
  18. Thread: Data cache

    by saulius_net
    Replies
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    3,388

    Data cache

    Hello,

    I want to ask about data cache when reading data. If I open table and do some query of data - will STSDB cache data (data pages cache)? And next time if i will send, (for example, same...
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    And this incorrect behavior affects quality of...

    And this incorrect behavior affects quality of delta compression, because of smaller data packages.
  20. Replies
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    BlockSize parameter

    Hello,

    I made some test with IBinaryPersist. In one of posts you wrote, that, to Store() method, STSDB sends items count, defined by BlockSize
    parameter when cache buffer overflow or Flush...
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    XTable and FTable

    Hello,

    Could You, Please, explain main differences between XTable and FTables. As I understand XTable is just same FTable just with journaling and Transactions support... Is there some situation...
  22. Hello, Are you planning implement second...

    Hello,

    Are you planning implement second indexes? It would be great improvement.

    My suggestion is:
    1. Store internally indexes as B+tree (or similar). Binary tree because to have possibility...
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    thank You, for your detail answer! But why...

    thank You, for your detail answer!

    But why decreasing BlockCapacity is not solution dealing with transactions which contains less 1024 records?
  24. Replies
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    DB File sizes

    Hello,

    I made some tests related to data file size. Some results was strange for me:

    1. If to create 1000 empty tables (No data) in database, file size = 140Mb. Why it is so big? 10000 empty
    ...
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    Internal FileSystem layer

    Hello,

    I want to ask why you need intermediate file system layer? As I saw in sources this is additional file system implementation over real file system. And this implementation hasn't...
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