On 08/09/11 11:07, Kjell Rilbe wrote:
> Den 2011-08-09 08:54 skrev Alex Peshkoff såhär:
>>   On 08/08/11 19:10, Dimitry Sibiryakov wrote:
>>> 08.08.2011 16:57, Kjell Rilbe wrote:
>>>> So, I ask you in the devel team: is the shadow file feature going to go
>>>> away or will you make sure it stays functional?
>>>     If discussion about dropping of shadow is ever raised I will vote 
>>> against.
>>>
>> +1
> OK, so it seems the feature will stay. Will it be "modernized"? I recall 
> that Helen or Ann has stated that the feature has some severe 
> performance issues. I don't know the details, but can and will anything 
> be done that would be relevant in a RAM disk + regular disk setup (or 
> otherwise)?

The only known for me currently problem is that shadows are not
supported in nbackup. What about performance - it might be good to set
FW mode for main file and mirror separately. Not sure how much FW
affects SSD in your case, but on posix systems there is a workaround:
mount ssd async, regular disk for shadow - sync and set FW off for
database. As the result main file and shadow will have different FW modes.


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