Tuning Innostore backend (flush_mode option error)

Sean Cribbs sean at basho.com
Tue May 18 07:36:49 EDT 2010


I'm sorry, that was a typo (that I seem to make frequently).  It's flush_method, not flush_mode.  I've corrected the wiki.

Sean Cribbs <sean at basho.com>
Developer Advocate
Basho Technologies, Inc.
http://basho.com/

On May 18, 2010, at 5:29 AM, Germain Maurice wrote:

> I red this page : https://wiki.basho.com/display/RIAK/Innostore+Configuration+and+Tuning
> Then, I put this configuration to my node :
> 
> {innostore, [
> {data_home_dir, "/reiser/riak/innodb"}, %% Where data files go
> {log_group_home_dir, "/reiser/riak/innodb"}, %% Where log files go
> {log_files_in_group, 6}, % How many files you need — usually, 3 < x < 6
> {log_file_size, 268435456}, % No bigger than 256MB — otherwise recovery takes too long
> {buffer_pool_size, 1073741824} %% 1024MB in-memory buffer in bytes
> ,{flush_mode, "O_DIRECT"} %% Linux specific
> ]}
> 
> But when i launch Riak, i got this error/warning :
> 
> =ERROR REPORT==== 18-May-2010::11:18:14 ===
> Skipping config setting flush_mode; unknown option.
> InnoDB: Mutexes and rw_locks use GCC atomic builtins
> 100518 11:18:18 InnoDB: highest supported file format is Barracuda.
> 100518 11:18:25 Embedded InnoDB 1.0.6.6750 started; log sequence number 110097552195
> 
> Is there a mistake in the option name ?
> 
> Thanks
> Germain
> 
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