On 16.01.2011 13:57, nap wrote:
But the unique need a select before, so it's too performance impacting, especially with "this" database schema. In fact the only part where we have duplication are the "common parts" : at the begining of all "configuration" incorporation, there are a big "clean all my instance" pass, so the only part that do not have a instance_id will have problem, like contacts or groups if I'm not wrong. So the insert with duplication are really the same value, so insert/delete or replace are the same thing. Of source only for mysql, other will still have problems for this.
the unique doesn't necessarily need a select before, you can also rebuild the logic of the 'on duplicate key' feature from mysql, basically sort of 'upsert'. this has been discussed all over the place on postgres mailinglists, and also oracle (but oracle is kind of 'special'). on oracle you might find the merge trick, which idoutils is using currently (where doing a merge on a single table, matching on the unique constraint and doing an insert or update either way). on postgresql you are required to build your own logic - or risk two queries. i have that currently implemented the way: try an update, if no rows affected, do an insert (which is rather bad in that situation). better would be a stored procedure for that, doing the exact same thing as mysql does internally when hitting the insert ... on duplicate key update ... i've been keeping something like that on my todo list for a while now, but not yet implemented. https://dev.icinga.org/issues/146
For Centreon I think it will have an impact for this, after all, here the problem is delete/insert or replace the same data, it's not like anothers values are impacted, so there won't be (bad) impacts, just less warning for the more common case (mysql), and others (Oracle, Postgresql) won't change (do they support ON DUPLICATE ?).
If postgres/oracle have the unique constraint set like mysql, they will surely spit out the same errors on unique constraint violation then. it depends how you handle that over there, as mentioned above with an upsert logic.
kind regards, Michael
JeanOn Sun, Jan 16, 2011 at 12:45 PM, Michael Friedrich <michael.friedr...@univie.ac.at <mailto:michael.friedr...@univie.ac.at>> wrote:On 16.01.2011 08:33, nap wrote:Oh thanks a lot, so I'll make it mysql backend only :)you might check the unique key instead and adapt the schema a bit then (not causing duplicate key violations), if it's not up to major changes/many rows then. but i am not sure how the centreon select logic works, so i'd vote for a clean (old grown compatible) solution then. kind regards, MichaelJean On Sat, Jan 15, 2011 at 6:04 PM, Michael Friedrich <michael.friedr...@univie.ac.at <mailto:michael.friedr...@univie.ac.at>> wrote: On 15.01.2011 13:31, nap wrote:I think I'll change the insert into replace. There are some tables that don't have an id for the configuration instance, and so duplicate cannot be avoid.consider that replace into is not available for postgres/oracle. you'll need kind of an upsert logic either realized by merge in oracle, or straight upsert procedures. mysql is simple with the insert on duplicate key update statement as an alternative, but this is non sql standard. kind regards, MichaelJean On Fri, Jan 14, 2011 at 5:05 PM, Tanguy von Stebut <tanguy.von.ste...@gmail.com <mailto:tanguy.von.ste...@gmail.com>> wrote: Hello folks, I've been trying to use Shinken with Centreon 2 as it is actually "wired" with a NdoDB over MySQL by default, and I also needed to produce a PoC of Shinken with a DB broker. For sure Centreon is still attractive for my boss... So, I configured the broker to connect to a Centreon - ndo - db that resides on an other VM. I could verify a simple command line connection with the user centreon. But now, when looking at the broker' logs, I can see Database integrity Warning returned by the remote MySQL DB. Ok, staying positive, I can say the broker' conf is good, but I'm worrying about the do-ability of the solution. Please let me know if you have some clue :) Here comes an extract of the broker o' log : {code}[CODE] IOError: [Errno 2] No such file or directory: '/usr/local/shinken/var/archives/nagios-01-14-2011- 00.log' /usr/lib/python2.6/site-packages/Shinken-0.4-py2.6.egg/shinken/db_mysql.py:58: Warning: Out of ra nge value adjusted for column 'last_command_check' at row 1 self.db_cursor.execute(query) /usr/lib/python2.6/site-packages/Shinken-0.4-py2.6.egg/shinken/db_mysql.py:58: Warning: Out of ra nge value adjusted for column 'last_log_rotation' at row 1 self.db_cursor.execute(query) [MysqlDB] Warning : a query raise an integrity error : INSERT INTO nagios_contacts (instance_id , alias , contact_object_id , host_notifications_enabled , pager_address , service_notifications_enabled , email_address , contact_id ) VALUES ('2' , 'none' , '2' , '1' , 'none' , '1' , 'napar...@gmail.com <mailto:napar...@gmail.com>' , '2' ), (1062, "Duplicate entry '2' for key 1") [MysqlDB] Warning : a query raise an integrity error : INSERT INTO nagios_contactgroups (contactgroup_id , instance_id , config_type , alias , contactgroup_object_id ) VALUES ('1' , '2' , '0' , 'admins' , '1' ), (1062, "Duplicate entry '1' for key 1") [MysqlDB] Warning : a query raise an integrity error : INSERT INTO nagios_hostgroups (instance_id , alias , config_type , hostgroup_id , hostgroup_object_id ) VALUES ('2' , 'Serveurs de la bulle M' , '0' , '1' , '75' ), (1062, "Duplicate entry '1' for key 1") [/CODE]{code} Regards, Tanguy von Stebut ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. 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