disabling the WAL from the config file

[Stefan Comanita <co...@yahoo.com>]

Hi,

I am kinda new to the underlying part of HBase and I have a 
question which seems trivial to me but i wasn't able to find an answer 
for it, so here it goes: "how do I disable the Write Ahead Wall (WAL) 
from the config file ?" i know about the setWriteToWAL(boolean) but i 
would like to do it from a config file.

Setting one or all of the
 parameters hbase.regionserver.logroll.period, 
hbase.regionserver.optionallogflushinterva, 
hbase.regionserver.flushlogentries to 0 will do the trick ?

Thank
 you.

Comanita Stefan


      

Re: disabling the WAL from the config file

[Friso van Vollenhoven <fv...@xebia.com>]

Hi Comanita,

The WAL on/off setting is not global. You need to use the API to enable / disable WAL for each put that you do [ Put#setWriteToWAL(boolean) ]. 

I don't know what will happen when you set the flushlogentries to 0, but those options are not meant for switching off WAL.


Friso



On 5 jan 2011, at 16:26, Stefan Comanita wrote:

> Hi,
> 
> I am kinda new to the underlying part of HBase and I have a 
> question which seems trivial to me but i wasn't able to find an answer 
> for it, so here it goes: "how do I disable the Write Ahead Wall (WAL) 
> from the config file ?" i know about the setWriteToWAL(boolean) but i 
> would like to do it from a config file.
> 
> Setting one or all of the
> parameters hbase.regionserver.logroll.period, 
> hbase.regionserver.optionallogflushinterva, 
> hbase.regionserver.flushlogentries to 0 will do the trick ?
> 
> Thank
> you.
> 
> Comanita Stefan
> 
>