On 09/08/2011 04:36 PM, Mike Christie wrote: > On 09/08/2011 02:06 AM, Heinrich Langos wrote: >> Hi htere, >> >> I am using the open-iscsi initiator to access a storage back end for >> my Xen based virtualization infrastructure. >> Since The current 3.0.x Linux kernel finally has everything that I >> need to run the host system (Dom0) without any additional patches I >> thought I'd give it a try and see if I can replace the 2.6.32 hosts >> that cause a lot of trouble when mixing Xen + iSCSI + multipath. >> >> This is raw "dd" throughput for reading ~30GB from an iSCSI storage >> via a dedicated 1GB Ethernet link. >> >> 2.6.32 : 102 MB/s >> 2.6.38 : 100 MB/s >> 2.6.39 : 44 MB/s >> 3.0.1 : 43 MB/s >> > > I can replicate this now. For some reason I only see it with 1 gig. I > think my 10 gig setups that I have been testing with are limited by > something else. > > Doing git bisect now to track down the change that caused the problem. >
I did not find anything really major in the iscsi code. But I did notice that if I just disable iptables throughput goes from about 5 MB/s back up to 85 MB/s. If you disable iptables do you see something similar. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to firstname.lastname@example.org. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.