Is that in lustre 2.5.3? the lctl --device=xx deactivate is what sets an ost to read-only mode, it doesn't permanently disable int in the system... or have I missed something?
w/r, Kurt ----- Original Message ----- From: "Chris Hunter" <[email protected]> To: "Kurt Strosahl" <[email protected]> Cc: [email protected] Sent: Thursday, January 21, 2016 4:13:35 PM Subject: Re: [lustre-discuss] Inactivated ost still showing up on the mds Hi Kurt, AFAIK when you set active=0 on the MDS it means "don't write new files to this OST but still read files". If what you really want is "don't try to read files from this OST", then you have to flip the active=0 bit on all your clients. I've never used the llite.lazystatfs option but it may do the same thing. FWIW, an alternative command to deactivate an OST is command "lctl --device=XX deactivate". regards, chris hunter On 01/21/2016 01:09 PM, Kurt Strosahl wrote: > Good Afternoon Chris, > > I have already run the active=0 command on the mds, is there another > step? From my testing under 2.5.3 the clients will hang indefinitely without > using the lazystatfs=1. > > Our major issue at present is that when the OST died it had a fair amount > of data on in (closing in on 2M files lost), and it seems like the client > gets into a bad state when calls re made repeatedly to files that are lost > (but still have their ost index information). As the crawl has unlinked > files the number of errors has dropped, as have client crashes. > > w/r, > Kurt > > ----- Original Message ----- > From: "Chris Hunter" <[email protected]> > To: [email protected] > Cc: "Kurt Strosahl" <[email protected]> > Sent: Thursday, January 21, 2016 12:50:03 PM > Subject: [lustre-discuss] Inactivated ost still showing up on the mds > > Hi Kurt, > For reference when an underlying OST object is missing, this is the > error message generated on our MDS (lustre 2.5): >> Lustre: 12752:0:(mdd_object.c:1983:mdd_dir_page_build()) build page failed: >> -5! > > I suspect until you update the MGS info the MDS will still connect to > the deactive OST. > > My experience is sometimes the recipe to deactivate an OST works > flawlessly sometimes other times the clients hang on "df" command and > timeout on file access. I guess the order which you run the commands > (ie. client vs server) is important. > > regards, > chris hunter > >> From: Kurt Strosahl <[email protected]> >> To: [email protected] >> Subject: [lustre-discuss] Inactivated ost still showing up on the mds >> >> All, >> >> Continuing the issues that I reported yesterday... I found that by >> unlinking lost files that I was able to stop the below error from occurring, >> this gives me hope that systems will stop crashing once all the lost files >> are scrubbed. >> >> LustreError: 7676:0:(sec.c:379:import_sec_validate_get()) import >> ffff880623098800 (NEW) with no sec >> LustreError: 7971:0:(sec.c:379:import_sec_validate_get()) import >> ffff880623098800 (NEW) with no sec >> >> I do note that the inactivated ost doesn't seem to ever REALLY go away. >> After I removed an ost from my test system I noticed that the mds still >> showed it... >> >> On a client hooked up to the test system... >> client: lfs df >> UUID 1K-blocks Used Available Use% Mounted on >> testL-MDT0000_UUID 1819458432 10112 1819446272 0% >> /testlustre[MDT:0] >> testL-OST0000_UUID 57914433152 12672 57914418432 0% >> /testlustre[OST:0] >> testL-OST0001_UUID 57914433408 12672 57914418688 0% >> /testlustre[OST:1] >> testL-OST0002_UUID 57914433408 12672 57914418688 0% >> /testlustre[OST:2] >> OST0003 : inactive device >> testL-OST0004_UUID 57914436992 144896 57914290048 0% >> /testlustre[OST:4 >> >> on the mds it still shows as up when I do lctl dl: >> mds: lctl dl | grep OST0003 >> 22 UP osp testL-OST0003-osc-MDT0000 testL-MDT0000-mdtlov_UUID 5 >> >> So I stopped the test system, ran lctl dl again (getting no results), and >> restarted it. Once the system was back up I still saw OST3 marked as UP >> with lctl dl: >> mds: lctl dl | grep OST0003 >> 11 UP osp testL-OST0003-osc-MDT0000 testL-MDT0000-mdtlov_UUID 5 >> >> Why does the mds still think that this OST is up? >> _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
