Re: failures on machines using jfs

Hannu Krosing wrote:
> Greg Spiegelberg kirjutas E, 12.01.2004 kell 19:03:
>
>>Hannu Krosing wrote:
>>
>>>Spiegelberg, Greg kirjutas P, 11.01.2004 kell 18:21:
>>>
>>>
>>>>It would seem we're experiencing somthing similiar with our scratch
>>>>volume (JFS mounted with noatime).
>>>
>>>
>>>Which files/directories do you keep on "scratch" volume ?
>>>
>>>All postgres files or just some (WAL, tmp) ?
>>
>>No Postgres files are kept in scratch only the files being loaded
>>into the database via COPY or lo_import.
>
>
> then the speedup does not make any sense !
>
> Is reading from jfs filesystem also 5 times faster than reading from
> ext3 ?
>
> The only explanation I can give to filling database from jfs volume to
> be so much faster could be some strange filesystem cache interactions.

http://www.potentialtech.com/wmoran/postgresql.php

--
Bill Moran
Potential Technologies
http://www.potentialtech.com