如何將Cassandra與PHP連接

Question

我需要使用'PHPCassa'將Cassandra與php連接的幫助，我嘗試過但遇到以下異常。我將Ubuntu用作網絡服務器。

NoServerAvailable Object（[message：protected] =>嘗試兩次連接到每個服務器兩次，但是所有嘗試均失敗。最后一個錯誤是：/ var /中帶有消息'Keyspace'testApp'不存在'的異常'cassandra_InvalidRequestException' www / Cassandra / phpcassa / thrift / packages / cassandra / Cassandra.php：138堆棧跟蹤：＃0 /var/www/Cassandra/phpcassa/thrift/packages/cassandra/Cas​​sandra.php(138）：thrift_protocol_read_binary（Object（TBinaryProtocolAccelerated） ，'cassandra_Cassa ...'，false）＃1 /var/www/Cassandra/phpcassa/thrift/packages/cassandra/Cas​​sandra.php(113）：CassandraClient-> recv_set_keyspace（）＃2 / var / www / Cassandra / phpcassa /connection.php(102）：CassandraClient-> set_keyspace（'testApp'）＃3 /var/www/Cassandra/phpcassa/connection.php(84）：ConnectionWrapper-> set_keyspace（'testApp'）＃4 / var / www /Cassandra/phpcassa/connection.php(222）：ConnectionWrapper-> __ construct（'testApp'，'127.0.0.1:9160'，NULL，true，5000，5000）＃5 / var / www / Cassandra / phpcassa / connection。 php（258）：Connectio nPool-> make_conn（）＃6 /var/www/Cassandra/phpcassa/connection.php(352）：ConnectionPool-> get（）＃7 /var/www/Cassandra/phpcassa/connection.php(287）：ConnectionPool- > call（'describe_keyspa ...'，'testApp'）＃8 /var/www/Cassandra/phpcassa/columnfamily.php(194）：ConnectionPool-> describe_keyspace（）＃9 /var/www/Cassandra/index.php （7）：ColumnFamily-> __ construct（Object（ConnectionPool），'Users'）＃10 {main} [string：Exception：private] => [code：protected] => 0 [file：protected] => / var / www / Cassandra / phpcassa / connection.php [行：受保護] => 233 [trace：Exception：private] =>數組（[0] =>數組（[file] => / var / www / Cassandra / phpcassa / connection .php [line] => 258 [function] => make_conn [class] => ConnectionPool [type] =>-> [args] => Array（））[1] => Array（[file] => / var /www/Cassandra/phpcassa/connection.php [line] => 352 [function] => get [class] => ConnectionPool [type] =>-> [args] => Array（））[2] =>數組（[file] => /var/www/Cassandra/phpcassa/connection.php [line] => 287 [function] =>調用 [class] => ConnectionPool [type] =>-> [args] =>數組（[0] => describe_keyspace [1] => testApp））[3] =>數組（[file] => / var / www /Cassandra/phpcassa/columnfamily.php [line] => 194 [function] => describe_keyspace [class] => ConnectionPool [type] =>-> [args] => Array（））[4] => Array（[文件] => /var/www/Cassandra/index.php [line] => 7 [function] => __construct [class] => ColumnFamily [type] =>-> [args] => Array（[0] = > ConnectionPool對象（[keyspace] => testApp [servers：ConnectionPool：private] =>數組（[0] => 127.0.0.1:9160）[pool_size：ConnectionPool：private] => 5 [send_timeout：ConnectionPool：private] = > 5000 [recv_timeout：ConnectionPool：private] => 5000 [憑據：ConnectionPool：private] => [framed_transport：ConnectionPool：private] => 1 [queue：ConnectionPool：private] =>數組（）[keyspace_description：ConnectionPool：private] => [max_retries] => 5 [回收] => 10000 [統計] =>數組（[創建] => 0 [失敗] => 2 [回收] => 0）[列表位置] => 0）[1] =>用戶） ））[上一個：異常：私有] =>）

Answer 1

鍵空間名稱對節儉（phpcassa）區分大小寫。 如果使用“ cqlsh”創建密鑰空間，並且未使用單引號，則CQL在創建名稱之前會將其轉換為小寫。
http://www.datastax.com/documentation/cassandra/1.2/webhelp/index.html#cassandra/cql_reference/cql_lexicon_c.html#reference_ds_b4h_gx5_yj

嘗試在phpcassa中使用“ testapp”作為名稱進行連接。