On Sun, Jan 16, 2011 at 11:10 PM, Michael Friedrich <
michael.friedr...@univie.ac.at> wrote:
> 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
>
Thanks for this. So in Mysql it's trivial, and in others it's rather complex
:)
I'll look at your code to see the tricks, sounds quite very good :)
>
>
>
>
> 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.
>
Hopefully here the duplicate is not a "huge problem" because it's really the
same data, so it's jsut notice instead of warning. But if we can manage it
in a clean way it's better of course :)
Thanks for all the tips :)
Jean
>
> kind regards,
> Michael
>
>
>
> Jean
>
> On Sun, Jan 16, 2011 at 12:45 PM, Michael Friedrich <
> 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,
>> Michael
>>
>>
>>
>> Jean
>>
>> On Sat, Jan 15, 2011 at 6:04 PM, Michael Friedrich <
>> 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,
>>> Michael
>>>
>>>
>>>
>>>
>>> Jean
>>>
>>> On Fri, Jan 14, 2011 at 5:05 PM, Tanguy von Stebut <
>>> 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' , '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
>>>>
>>>>
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