On Wed, Jul 28, 2010 at 02:56:58PM -0700, Shailendra Mishra wrote:
Hi Niels:
I don't care if the log gets written on table creation. I tried the flag but it didn't do anything. The default value is 0. In the FebPS2 version it's a debug flag - actually setting it to 128 doesn't help. On closer examination it appears that it checks for if (debug & 1) then it would write a log. Setting debug to 128, would imply that debug & 1 = 0 and so no debug output is written. Can you tell me where the log writer code is ? Is it gdk_logger.c ? if yes, which is the function that writes the log_write_format, log_write_string, if not which ones.
Indeed gdk_logger.mx is the file too look at. The log_bat function has code to disable logging, ie
if (lg->debug & 128) { /* logging is switched off */ return LOG_OK; }
Niels
-- Shailendra
------------------------------ Message: 5 Date: Wed, 28 Jul 2010 08:40:06 +0200 From: Niels Nes <Niels.Nes@cwi.nl> Subject: Re: [MonetDB-users] Creating table with nologging. To: Communication channel for MonetDB users <monetdb-users@lists.sourceforge.net> Message-ID: <20100728064006.GA6626@cwi.nl> Content-Type: text/plain; charset=utf-8 On Tue, Jul 27, 2010 at 04:28:56PM -0700, Shailendra Mishra wrote: > I have the need for creating table with nologging enabled. I do > understand that MonetDB is not meant to be used this way. However, I am > trying to use it to ingest data off data-feeds. My db lives on a SSD, > and the only DML that I execute is INSERT. I would appreciate if folks > familiar with the server code could point me source files ?where I > could make the change to achieve this. Thanks in advance for your help. > > -- Shailendra Shailendra I haven't tried this in a while but it used to be possible to switch logging of inserts of using a debug flag (passed to the logger code). See the file src/storage/bat/bat_logger.mx function bl_create. The first argument to logger_create should be 128 to switch off logging. This will only disable that every insert will also write the inserted values to the log. It still creates a log for your initial create table statement. Indeed this is un documented and far from normal supported usage of monetdb. Niels
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