[dm-devel] Question about iscsi session block

2022-02-15 Thread Zhengyuan Liu
Hi, all We have an online server which uses multipath + iscsi to attach storage from Storage Server. There are two NICs on the server and for each it carries about 20 iscsi sessions and for each session it includes about 50 iscsi devices (yes, there are totally about 2*20*50=2000 iscsi block devi

Re: [dm-devel] Question about iscsi session block

2022-02-15 Thread Mike Christie
On 2/15/22 9:49 AM, Zhengyuan Liu wrote: > Hi, all > > We have an online server which uses multipath + iscsi to attach storage > from Storage Server. There are two NICs on the server and for each it > carries about 20 iscsi sessions and for each session it includes about 50 > iscsi devices (yes,

Re: [dm-devel] Question about iscsi session block

2022-02-15 Thread Zhengyuan Liu
On Wed, Feb 16, 2022 at 12:31 AM Mike Christie wrote: > > On 2/15/22 9:49 AM, Zhengyuan Liu wrote: > > Hi, all > > > > We have an online server which uses multipath + iscsi to attach storage > > from Storage Server. There are two NICs on the server and for each it > > carries about 20 iscsi sessio

Re: [dm-devel] Question about iscsi session block

2022-02-15 Thread Donald Williams
Hello, Something else to check is your MPIO configuration. I have seen this same symptom when the linux MPIO feature "queue_if_no_path" was enabled From the /etc/multipath.conf file showing it enabled. failbackimmediate features"1 queue_if_no_path" A

Re: [dm-devel] Question about iscsi session block

2022-02-15 Thread michael . christie
On 2/15/22 7:28 PM, Zhengyuan Liu wrote: > On Wed, Feb 16, 2022 at 12:31 AM Mike Christie > wrote: >> >> On 2/15/22 9:49 AM, Zhengyuan Liu wrote: >>> Hi, all >>> >>> We have an online server which uses multipath + iscsi to attach storage >>> from Storage Server. There are two NICs on the server an

Re: [dm-devel] Question about iscsi session block

2022-02-27 Thread Mike Christie
On 2/15/22 8:19 PM, michael.chris...@oracle.com wrote: > On 2/15/22 7:28 PM, Zhengyuan Liu wrote: >> On Wed, Feb 16, 2022 at 12:31 AM Mike Christie >> wrote: >>> >>> On 2/15/22 9:49 AM, Zhengyuan Liu wrote: Hi, all We have an online server which uses multipath + iscsi to attach stor

Re: [dm-devel] Question about iscsi session block

2022-05-25 Thread Zhengyuan Liu
Hi, Mike, Sorry for the delayed reply since I have no environment to check your bellow patcheset untile recently https://lore.kernel.org/all/20220226230435.38733-1-michael.chris...@oracle.com/ After applied those series, the total time has dropped from 80s to nearly 10s, it's a great improvemen