CUBRID Q&A http://www.cubrid.org/?mid=questions CUBRID Q&A en Fri, 21 Oct 2011 02:37:10 -0800 Mon, 20 May 2013 01:15:17 -0800 XpressEngine 1.4.4.1 Join between multiple Shard http://www.cubrid.org/questions/617483 http://www.cubrid.org/questions/617483 Hi,

I might miss this out when skimming tru the docs. How do we run query (join) accross multiple shard? if I had few tables in the join that is sharded and they are shard base on different columns, how will the performance like? any best practices or things to avoids?

]]> Wed, 20 Mar 2013 20:17:56 -0800 Sharding 1 Strange behavior in HA mode http://www.cubrid.org/questions/541665 http://www.cubrid.org/questions/541665 Hi!

I setup a ha cluster with master+slave following this tutorial: http://www.cubrid.org/manual/843/en/CUBRID%20HA.

I called my nodes : cubrid and cubrid2.

All nodes have this in cubrid.conf:

[@demodb]
ha_mode=on
force_remove_log_archives=no
log_max_archives=100

cubrid_ha.conf:

[common]
ha_copy_sync_mode=sync:sync
ha_port_id=59901
ha_node_list=demodb@cubrid:cubrid2
ha_db_list=demodb
ha_apply_max_mem_size=500


cubrid@cubrid:~$ cubrid heartbeat status
@ cubrid heartbeat list
 HA-Node Info (current cubrid, state master)
   Node cubrid2 (priority 2, state slave)
   Node cubrid (priority 1, state master)
 HA-Process Info (master 882, state master)
   Applylogdb demodb@localhost:/var/opt/cubrid/databases/demodb_cubrid2 (pid 3342, state registered)
   Copylogdb demodb@cubrid2:/var/opt/cubrid/databases/demodb_cubrid2 (pid 3340, state registered)
   Server demodb (pid 3123, state registered_and_active)


cubrid@cubrid2:~$ cubrid heartbeat status
@ cubrid heartbeat list

 HA-Node Info (current cubrid2, state slave)
   Node cubrid2 (priority 2, state slave)
   Node cubrid (priority 1, state master)
 HA-Process Info (master 2478, state slave)
   Applylogdb demodb@localhost:/var/opt/cubrid/databases/demodb_cubrid (pid 2704, state registered)
   Copylogdb demodb@cubrid:/var/opt/cubrid/databases/demodb_cubrid (pid 2702, state registered)
   Server demodb (pid 2485, state registered)

When I do some benchmark on the node "cubrid2", I can see node "cubrid" sending the data to cubrid2 then cubrid2 to my client. Using "top" command I can see node "cubrid" becomes busy with many INSERT, where as node "cubrid2" idle.

When I shutdown the node "cubrid", "cubrid2" becomes the new master but I can't send any query to cubrid2, it times out (trying to fetch data from node "cubrid"). When node "cubrid" is back, cubrid2 answer (I have to reload the heartbeat).

I'm using CUBRID version 8.4.3 from Ubuntu (12.04) repository

Thanks!

]]> Wed, 02 Jan 2013 00:54:07 -0800 HA 3 cubrid shard start: fail: failed to connect database lzfcome http://www.cubrid.org/questions/507666 http://www.cubrid.org/questions/507666
sh> cubrid shard start@ cubrid shard startfailed to connect database. [shard]
please check your $CUBRID/conf/shard.conf or database status.
[%shard]
SHARD_DB_NAME        = shard1
SHARD_DB_USER        = shard
++ cubrid shard start: fail

My shard_connection.txt :

 # cubrid

0               shard1          10.34.64.220

1               shard1          10.34.64.220

2               shard1          localhost

3               shard1          localhost

The database shard1 in localhost and the database shard1 in 10.4.64.220 are OK,  I can connect to either.

The error_log/shard_1_0_1.err:

[tobi@NC-PL-DEV001 conf]$ tail ../log/broker/error_log/shard_1_1_1.err 

Server bit platform (64) is different from client bit platform (32).

Time: 05/15/06 04:28:50.048 - ERROR *** file ../../src/transaction/boot_cl.c, line 1453 ERROR CODE = -677 Tran = -1, EID = 206

Failed to connect to database server, 'shard1', on the following host(s): 10.34.64.220

Time: 05/15/06 04:28:50.048 - ERROR *** file ../../src/transaction/boot_cl.c, line 1468 ERROR CODE = -677 Tran = -1, EID = 207

Failed to connect to database server, 'shard1', on the following host(s): 10.34.64.220:10.34.64.220

*** The previous error message is the last one. ***

Can you help me? thanks.

]]> Mon, 26 Nov 2012 22:06:13 -0800 HA Sharding 1 "ha_node_list": Unknown system parameter or bad value. http://www.cubrid.org/questions/472808 http://www.cubrid.org/questions/472808 I'am trying to configure HA with CentOS5/CUBRID 9.0 Beta. All configs are filled according to manual, but both servers print error on start:

Time: 10/30/12 02:33:30.825 - ERROR *** file ../src/executables/master_heartbeat.c, line 3164 ERROR CODE = -839 Tran = -1, EID = 1
"ha_node_list": Unknown system parameter or bad value.


cubrid_ha.conf contains line:
ha_node_list=cubrid@nodeA:nodeB

nodeA and nodeB are described in /etc/hosts
]]> Mon, 29 Oct 2012 22:45:26 -0800 HA 3 How to find out the Charset CUBRID uses ? ovidiuv http://www.cubrid.org/questions/431786 http://www.cubrid.org/questions/431786 Hello,

I want to find out the charset used in CUBRID using SQL. In MySQL it is possible to perform this operation by running "SHOW VARIABLES LIKE 'character_set%'". Is there anything similar for CUBRID ?

Best regards,

Ovidiu

]]> Wed, 19 Sep 2012 04:54:59 -0800 SQL CUBRID charset 1 Does Cubrid support Master:Master replication http://www.cubrid.org/questions/414266 http://www.cubrid.org/questions/414266 In my use case I require every node to be a master node, accept reads and writes is this possible with cubrid?

As it says on http://www.cubrid.org/key_features

"Reduced hardware costs with the configuration of multiple master database nodes and one or more slave database nodes."

Thanks,

Duarte

]]> Thu, 23 Aug 2012 04:01:50 -0800 HA 2 Multiple CUBRID Instances dolph http://www.cubrid.org/questions/235384 http://www.cubrid.org/questions/235384 I can see in jdbc help manual that you can login to alternative servers.

Can multiple instances of CUBRID run on the same machine? Also, can you please describe the setup?

]]> Sat, 05 Nov 2011 11:13:29 -0800 JDBC HA alternative host 1