add sharding logic

1 files changed, 15 insertions, 0 deletions

diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 260fab3c..b3e51c10 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -2242,6 +2242,21 @@ struct TALER_EXCHANGEDB_Plugin
                       const uint32_t num);
 
   /**
+   * Change already present tables of the database to num shards
+   * Only has an effect if there are default partitions only
+   *
+   * @param cls the @e cls of this struct with the plugin-specific state
+   * @param num the number of shard servers to create. The shard servers
+   *            must follow the numbering of 1-N, have the same user as
+   *            the master and have tables named <table>_n where n is the same
+   *            as the servers index of N.
+   * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
+   */
+  enum GNUNET_GenericReturnValue
+  (*setup_shards)(void *cls,
+                  const uint32_t num);
+
+  /**
    * Start a transaction.
    *
    * @param cls the @e cls of this struct with the plugin-specific state