Alan Dayley wrote: > Maybe http://www.otisworldwide.com/ ? > > (Sorry, couldn't resist.) > > Side track: What does the word "elevator" mean in the context of RAID? > > Alan > > On Tue, Sep 28, 2010 at 8:59 AM, Eric Shubert > wrote: > > Is there a particular elevator that generally works best with > software raid-1? > > (More generally, what is the relationship, if any, between elevators > and sw raid?) > > -- > -Eric 'shubes' > > --------------------------------------------------- Ha! In the linux kernel, the I/O scheduler is referred to as the elevator. It can be set to one of 4 values in the 2.6 kernel using the elevator= kernel parameter at boot time. Each block device's scheduler is determined by the value in /sys/block//queue/scheduler $ cat /sys/block/sda/queue/scheduler noop anticipatory deadline [cfq] You can change a device's elevator on the fly by doing: # echo deadline >/sys/block/sda/queue/scheduler I'm just wondering which value gives the best performance when using software raid-1, or if the choice depends more on the type of load that's being processed. -- -Eric 'shubes' --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss