Re: Multipath failover handling (Was: Re: 2.6.24-rc3-mm1)

2008-01-07 Thread Mike Christie
James Bottomley wrote: However, there's still devloss_tmo to consider ... even in multipath, I don't think you want to signal path failure until devloss_tmo has fired otherwise you'll get too many transient up/down events which damage performance if the array has an expensive failover model. Ye

Re: Multipath failover handling (Was: Re: 2.6.24-rc3-mm1)

2008-01-07 Thread James Bottomley
On Mon, 2008-01-07 at 15:05 +0100, Hannes Reinecke wrote: > James Bottomley wrote: > > On Fri, 2007-12-14 at 10:00 +0100, Hannes Reinecke wrote: > >> James Bottomley wrote: > >>> On Mon, 2007-11-26 at 22:15 -0800, Andrew Morton wrote: > OK, thanks. I'll assume that James and Hannes have this

Multipath failover handling (Was: Re: 2.6.24-rc3-mm1)

2008-01-07 Thread Hannes Reinecke
James Bottomley wrote: > On Fri, 2007-12-14 at 10:00 +0100, Hannes Reinecke wrote: >> James Bottomley wrote: >>> On Mon, 2007-11-26 at 22:15 -0800, Andrew Morton wrote: OK, thanks. I'll assume that James and Hannes have this in hand (or will have, by mid-week) and I won't do anything her