Re: IB server hardware question

Bill Todd

Delphi Developer

Re: IB server hardware question

2007-12-17 07:56:35 PM
delphi223
SimonW writes:

Quote

Excuse my ignorance regarding RAID, but doesn't this conflict with
the requirement to have all disk caching turned off so that commits
get written to oxide immediately ?
Read cache is good.

Write cache is bad.
--
Bill Todd (TeamB)

Sean Leyne

Delphi Developer

2007-12-18 01:39:28 AM

Re: IB server hardware question

Bill,

Quote

>Excuse my ignorance regarding RAID, but doesn't this conflict with
>the requirement to have all disk caching turned off so that commits
>get written to oxide immediately ?

Read cache is good.
Write cache is bad.
I think you meant:

Read cache is good.
Write cache *with* battery backup module and OS disk caching set to
"write-back" is very good.
Write cache *with* battery backup module is good.
Write cache *without* battery backup module is very bad.
Sean

Bill Todd

Delphi Developer

2007-12-18 06:06:31 AM

Re: IB server hardware question

Sean Leyne writes:

Quote

Read cache is good.
Write cache with battery backup module and OS disk caching set to
"write-back" is very good. Write cache with battery backup module is
good. Write cache without battery backup module is very bad.
Or, write caching in any environment where any failure can leave writes

in the cache is bad. All other caching is good.<g>
--
Bill Todd (TeamB)