Re: [CentOS] Multipath and iSCSI Targets

2010-03-20 Thread Ross Walker
On Mar 20, 2010, at 4:52 PM, Drew wrote: >>> Depends on the target and the setup, ideally if you have 4 NICs you >>> should be using at least two different VLANs, and since you have 4 >>> NICs (I assume for iSCSI only) you should use jumbo frames. >> >> Jumbo frames should only be used if your CP

Re: [CentOS] Multipath and iSCSI Targets

2010-03-20 Thread Drew
>> Depends on the target and the setup, ideally if you have 4 NICs you >> should be using at least two different VLANs, and since you have 4 >> NICs (I assume for iSCSI only) you should use jumbo frames. > > Jumbo frames should only be used if your CPU can't keep up with the > load of 4 NICs otherw

Re: [CentOS] Multipath and iSCSI Targets

2010-03-19 Thread Ross Walker
On Mar 19, 2010, at 11:12 AM, "nate" wrote: > Joseph L. Casale wrote: >> Just started messing with multipath against an iSCSI target with 4 >> nics. >> What should one expect as behavior when paths start failing? My lab >> setup >> was copying some data on a mounted block device when I droppe

Re: [CentOS] Multipath and iSCSI Targets

2010-03-19 Thread nate
Joseph L. Casale wrote: > Just started messing with multipath against an iSCSI target with 4 nics. > What should one expect as behavior when paths start failing? My lab setup > was copying some data on a mounted block device when I dropped 3 of 4 paths > and the responsiveness of the server complet

[CentOS] Multipath and iSCSI Targets

2010-03-19 Thread Joseph L. Casale
Just started messing with multipath against an iSCSI target with 4 nics. What should one expect as behavior when paths start failing? My lab setup was copying some data on a mounted block device when I dropped 3 of 4 paths and the responsiveness of the server completely tanked for several minutes.