From: Joshua D. Drake <jd@commandprompt.com>
To: Brandon Shalton <brandon@cydataservices.com>
Cc: me@benjaminarai.com, PostgreSQL <pgsql-general@postgresql.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Partioning tsearch2 a table into chunks and accessing via views
Date: Fri, 24 Aug 2007 18:29:18 -0700
Message-ID: <46CF85EE.5040805@commandprompt.com> (raw)
In-Reply-To: <0be901c7e6cb$a2b13320$c901a8c0@blaptop>
References: <3147EF26-2649-4FDF-BD86-2DB0AF8460FC@benjaminarai.com>
<0be901c7e6cb$a2b13320$c901a8c0@blaptop>
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Brandon Shalton wrote:
> Benjamin,
>
>
>>
>> In order to avoid the re-indexing I was thinking of instead creating
>> a new
>> table each month (building its indexes and etc) and accessing them all
>> through a view. This way I only have to index the new data each month.
>>
>
> Take a look at bizgres.org (based on postgres).
>
> They have a parent-child structure.
>
> The way i use it, is I have about 30M records a day that are inserted
> into the database.
>
> Each day is a "child" table to the "parent".
>
> so example:
>
> the parent table is called "logfile"
>
> each day, is a child, with the structure like "logfile_YYMMDD"
>
> the "child" inherits the table structure of the parent, such that you
> could query the child table name directly, or you run the query against
> the parent (ie. logfile table) and get all the data.
>
> the indexes are done on a per table basis, so new data that comes in, is
> a lesser amount, and doesn't require re-indexing.
PostgreSQL can do all of this too.
Sincerely,
Joshua D. Drake
>
>
> example:
>
> select * from logfile_070825 where datafield = 'foo'
>
> if i knew i wanted to specifically go into that child, or:
>
> select * from logfile where datafield = 'foo'
>
> and all child tables are searched and results merged. You can perform
> any kind of sql query and field structures are you normally do.
>
> the downside is that the queries are run sequentially.
>
> so if you had 100 child tables, each table is queried via indexes, then
> results are merged.
>
> but, this approach does allow me to dump alot of data in, without having
> the re-indexing issues you are facing.
>
> at some point, you could roll up the days, in to weekly child tables,
> then monthly tables, etc.
>
> I believe Bizgres has a new version of their system that does parallel
> queries which would certainly speed things up.
>
> For your documents, you can do it by the day it was checked in, or maybe
> you have some other way of logically grouping, but the parent/child
> table structure really helped to solve my problem of adding in millions
> of records each day.
>
> The closest thing in mysql is using merge tables, which is not really
> practical when it comes time to do the joins to the tables.
>
> -brandon
>
> http://www.t3report.com - marketing intelligence for online marketing
> and affiliate programs
>
>
>
>
>
>
>
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend
>
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Subject: Re: [PERFORM] Partioning tsearch2 a table into chunks and accessing via views
In-Reply-To: <46CF85EE.5040805@commandprompt.com>
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