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 <p><a class="el" href="classignite_1_1transactions_1_1Transaction.html" title="Ignite cache transaction. ">Transaction</a> concurrency control model.
  <a href="structignite_1_1transactions_1_1TransactionConcurrency.html#details">More...</a></p>

 <p><code>#include &lt;<a class="el" href="transaction__consts_8h_source.html">transaction_consts.h</a>&gt;</code></p>
 <table class="memberdecls">
 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
 Public Types</h2></td></tr>
 <tr class="memitem:ae4a4021eb1bbb6d2acdaad1defeb469a"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469a">Type</a> { <a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469aa2916f106d3ff23fa17ee5ccf005808ca">OPTIMISTIC</a> = 0,
 <a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469aa2dab87bb6563f92fc20d5b0ba28a47b7">PESSIMISTIC</a> = 1
  }</td></tr>
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 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock"><p><a class="el" href="classignite_1_1transactions_1_1Transaction.html" title="Ignite cache transaction. ">Transaction</a> concurrency control model. </p>
 </div><h2 class="groupheader">Member Enumeration Documentation</h2>
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           <td class="memname">enum <a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469a">ignite::transactions::TransactionConcurrency::Type</a></td>
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 <table class="fieldtable">
 <tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="ae4a4021eb1bbb6d2acdaad1defeb469aa2916f106d3ff23fa17ee5ccf005808ca"></a>OPTIMISTIC&#160;</td><td class="fielddoc">
 <p>Optimistic concurrency model. </p>
 <p>In this mode all cache operations are not distributed to other nodes until <a class="el" href="classignite_1_1transactions_1_1Transaction.html#aa7536d728f02cfeb79266a1c1b111c37" title="Commit the transaction. ">Transaction::Commit()</a> 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 class="anchor" id="ae4a4021eb1bbb6d2acdaad1defeb469aa2dab87bb6563f92fc20d5b0ba28a47b7"></a>PESSIMISTIC&#160;</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 <a class="el" href="classignite_1_1transactions_1_1Transaction.html#aa7536d728f02cfeb79266a1c1b111c37" title="Commit the transaction. ">Transaction::Commit()</a> 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>
 </td></tr>
 </table>

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 <hr/>The documentation for this struct was generated from the following file:<ul>
 <li><a class="el" href="transaction__consts_8h_source.html">transaction_consts.h</a></li>
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	<p><a class="el" href="classignite_1_1transactions_1_1Transaction.html" title="Ignite cache transaction. ">Transaction</a> concurrency control model.
	<a href="structignite_1_1transactions_1_1TransactionConcurrency.html#details">More...</a></p>

	<p><code>#include <<a class="el" href="transaction__consts_8h_source.html">transaction_consts.h</a>></code></p>
	<table class="memberdecls">
	<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
	Public Types</h2></td></tr>
	<tr class="memitem:ae4a4021eb1bbb6d2acdaad1defeb469a"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469a">Type</a> { <a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469aa2916f106d3ff23fa17ee5ccf005808ca">OPTIMISTIC</a> = 0,
	<a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469aa2dab87bb6563f92fc20d5b0ba28a47b7">PESSIMISTIC</a> = 1
	}</td></tr>
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	<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
	<div class="textblock"><p><a class="el" href="classignite_1_1transactions_1_1Transaction.html" title="Ignite cache transaction. ">Transaction</a> concurrency control model. </p>
	</div><h2 class="groupheader">Member Enumeration Documentation</h2>
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	<td class="memname">enum <a class="el" href="structignite_1_1transactions_1_1TransactionConcurrency.html#ae4a4021eb1bbb6d2acdaad1defeb469a">ignite::transactions::TransactionConcurrency::Type</a></td>
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	<table class="fieldtable">
	<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="ae4a4021eb1bbb6d2acdaad1defeb469aa2916f106d3ff23fa17ee5ccf005808ca"></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 <a class="el" href="classignite_1_1transactions_1_1Transaction.html#aa7536d728f02cfeb79266a1c1b111c37" title="Commit the transaction. ">Transaction::Commit()</a> 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 class="anchor" id="ae4a4021eb1bbb6d2acdaad1defeb469aa2dab87bb6563f92fc20d5b0ba28a47b7"></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 <a class="el" href="classignite_1_1transactions_1_1Transaction.html#aa7536d728f02cfeb79266a1c1b111c37" title="Commit the transaction. ">Transaction::Commit()</a> 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>
	</td></tr>
	</table>

	</div>
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	<hr/>The documentation for this struct was generated from the following file:<ul>
	<li><a class="el" href="transaction__consts_8h_source.html">transaction_consts.h</a></li>
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