Re: [ovirt-users] High latency on storage domains and sanlock renewal error

sorry to jump in, but what kernel version are you using? had similar issue with kernel 4.10/4.11 2017-05-12 16:36 GMT-03:00 Stefano Bovina <bovy89(a)gmail.com&gt;: > Hi, > a little update: > > The command multipath -ll hung when executed on the host while the > problem occur (nothing logged in /var/log/messages or dmesg). > > I tested latency with ioping: > ioping /dev/6a386652-629d-4045-835b-21d2f5c104aa/metadata > > Usually it return "time=15.6 ms", sometimes return "time=19 s" (yes, > seconds) > > Systems are up to date and I tried both path_checker (emc_clariion and > directio), without results. > (https://access.redhat.com/solutions/139193, it refers to the Rev A31 of > EMC document; last is A42 and suggest emc_clariion). > > Any idea or suggestion? > > Thanks, > > Stefano > > 2017-05-08 11:56 GMT+02:00 Yaniv Kaul <ykaul(a)redhat.com&gt;: > >> >> >> On Mon, May 8, 2017 at 11:50 AM, Stefano Bovina <bovy89(a)gmail.com&gt; >> wrote: >> >>> Yes, >>> this configuration is the one suggested by EMC for EL7. >>> >> >> https://access.redhat.com/solutions/139193 suggest that for alua, the >> patch checker needs to be different. >> >> Anyway, it is very likely that you have storage issues - they need to be >> resolved first and I believe they have little to do with oVirt at the >> moment. >> Y. >> >> >>> >>> By the way, >>> "The parameters rr_min_io vs. rr_min_io_rq mean the same thing but are >>> used for device-mapper-multipath on differing kernel versions." and >>> rr_min_io_rq default value is 1, rr_min_io default value is 1000, so it >>> should be fine. >>> >>> >>> 2017-05-08 9:39 GMT+02:00 Yaniv Kaul <ykaul(a)redhat.com&gt;: >>> >>>> >>>> On Sun, May 7, 2017 at 1:27 PM, Stefano Bovina <bovy89(a)gmail.com&gt; >>>> wrote: >>>> >>>>> Sense data are 0x0/0x0/0x0 >>>> >>>> >>>> Interesting - first time I'm seeing 0/0/0. The 1st is usually 0x2 (see >>>> [1]), and then the rest [2], [3] make sense. >>>> >>>> A google search found another user with Clarion with the exact same >>>> error[4], so I'm leaning toward misconfiguration of multipathing/clarion >>>> here. >>>> >>>> Is your multipathing configuration working well for you? >>>> Are you sure it's a EL7 configuration? For example, I believe you >>>> should have rr_min_io_rq and not rr_min_io . >>>> Y. >>>> >>>> [1] http://www.t10.org/lists/2status.htm >>>> [2] http://www.t10.org/lists/2sensekey.htm >>>> [3] http://www.t10.org/lists/asc-num.htm >>>> [4] http://www.linuxquestions.org/questions/centos-111/multi >>>> path-problems-4175544908/ >>>> >>> >>> >> > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > >