Hi Jose,
When i try to write data concurrently in the same collection with
> another write or read another document, the second operation can not
> start until the first is finished (the collection is locked from the
> first action).
>
Unfortunately, in Sedna the whole collection is locked when one of the
documents is being updated.
> How could i solve this problem? I think this situation is ok when i try
> to read and write the same document, but it happens with different
> documents.
>
Some drivers (e.g. PHP, C) provide support for read-only transactions: see
http://sedna.org/progguide/ProgGuidesu2.html#x5-130001.2.3 (
SEDNA_ATTR_CONCURRENCY_TYPE ). We can add support for RO transactions in
Sedna's Java driver (which is included in Sedna package).
Ivan Shcheklein,
Sedna Team
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