Mario Weilguni wrote:
>>>So the question is: has anybody verified, that the log is written to disk
>>>before returning from commit?
>>
>>Some (or all?) IDE disks are known to lie: they report success as
>>soon as the data have reached the drive's RAM.
>
>
> under linux, hdparm -W can turn off the write cache of IDE disk, maybe you
> should try with write-caching turned off.
Yes, that made a big difference. Latency went up to 25-95ms.
Regards,
Matthias Meixner
--
Matthias Meixner meixner@informatik.tu-darmstadt.de
Technische Universität Darmstadt
Datenbanken und Verteilte Systeme Telefon (+49) 6151 16 6232
Wilhelminenstraße 7, D-64283 Darmstadt, Germany Fax (+49) 6151 16 6229
