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| <p>Transaction concurrency control model. |
| <a href="structignite_1_1thin_1_1transactions_1_1TransactionConcurrency.html#details">More...</a></p> |
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| <p><code>#include <<a class="el" href="thin-client_2include_2ignite_2thin_2transactions_2transaction__consts_8h_source.html">transaction_consts.h</a>></code></p> |
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| <tr class="memitem:a73c4c86e44cf441df006c8e242ac3fdd"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="structignite_1_1thin_1_1transactions_1_1TransactionConcurrency.html#a73c4c86e44cf441df006c8e242ac3fdd">Type</a> { <a class="el" href="structignite_1_1thin_1_1transactions_1_1TransactionConcurrency.html#a73c4c86e44cf441df006c8e242ac3fdda17020cd3cf81eaf17916c26cf787cb42">OPTIMISTIC</a> = 0, |
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| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <div class="textblock"><p>Transaction concurrency control model. </p> |
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| <td class="memname">enum <a class="el" href="structignite_1_1thin_1_1transactions_1_1TransactionConcurrency.html#a73c4c86e44cf441df006c8e242ac3fdd">ignite::thin::transactions::TransactionConcurrency::Type</a></td> |
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| <tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="a73c4c86e44cf441df006c8e242ac3fdda17020cd3cf81eaf17916c26cf787cb42"></a>OPTIMISTIC </td><td class="fielddoc"><p>Optimistic concurrency model. </p> |
| <p>In this mode all cache operations are not distributed to other nodes until Transaction::Commit() is called. In this mode one <code>'PREPARE'</code> message will be sent to participating cache nodes to start acquiring per-transaction locks, and once all nodes reply <code>'OK'</code>, a one-way <code>'COMMIT'</code> message is sent without waiting for reply.</p> |
| <p>Note that in this mode, optimistic failures are only possible in conjunction with ::IGNITE_TX_ISOLATION_SERIALIZABLE isolation level. In all other cases, optimistic transactions will never fail optimistically and will always be identically ordered on all participating grid nodes. </p> |
| </td></tr> |
| <tr><td class="fieldname"><a id="a73c4c86e44cf441df006c8e242ac3fdda43f370006a8d920c4783eddef1975a9b"></a>PESSIMISTIC </td><td class="fielddoc"><p>Pessimistic concurrency model. </p> |
| <p>In this mode a lock is acquired on all cache operations with exception of read operations in ::IGNITE_TX_ISOLATION_READ_COMMITTED mode. All optional filters passed into cache operations will be evaluated after successful lock acquisition. Whenever Transaction::Commit() is called, a single one-way <code>'COMMIT'</code> message is sent to participating cache nodes without waiting for reply. Note that there is no reason for distributed <code>'PREPARE'</code> step, as all locks have been already acquired. </p> |
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| <hr/>The documentation for this struct was generated from the following file:<ul> |
| <li><a class="el" href="thin-client_2include_2ignite_2thin_2transactions_2transaction__consts_8h_source.html">thin-client/include/ignite/thin/transactions/transaction_consts.h</a></li> |
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