Hi Russell/*, If we run ibdiagnet we get errors/warnings about some (newer) nodes which happen to have a new firmware on the IB interface:
Nodes Information -E- FW Check finished with errors -W- pg-gpu01/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-gpu05/U1 - Node has FW version 2.35.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-gpu06/U1 - Node has FW version 2.35.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-gpu02/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-gpu03/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-gpu04/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- switch-f0cc8e/U1 - Node has FW version 9.2.7300 while the latest FW version, for the same device available on this fabric is 9.2.8000 -W- pg-memory02/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-memory01/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-memory03/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-memory04/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-memory06/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-memory05/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node163/U1 - Node has FW version 2.36.5000 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node164/U1 - Node has FW version 2.36.5000 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node001/U1 - Node has FW version 2.33.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-interactive/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- peregrine/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node004/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node005/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node006/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node007/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node008/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node009/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node010/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node011/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node012/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node013/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node014/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 -W- pg-node015/U1 - Node has FW version 2.32.5100 while the latest FW version, for the same device available on this fabric is 2.36.5150 Could that be problematic/an issue? On Mon, Apr 24, 2017 at 4:27 PM, Russell Dekema <[email protected]> wrote: > Oh, ok, that seems to rule the subnet manager out. > > I mis-read your IP network numbers earlier and thought you had not > tried regular IP-ping across your IPoIB interfaces, but, upon > re-reading your initial message, it seems you have tried this and it > does work, even between a client with non-working Lustre and your > MGS/MDS. > > In this case, I have no further suggestions. > > Best of luck, > Rusty D. > > On Mon, Apr 24, 2017 at 10:19 AM, Strikwerda, Ger > <[email protected]> wrote: > > Hi Russell, > > > > Thanks for the IB subnet clues: > > > > [root@pg-gpu01 ~]# ibv_devinfo > > hca_id: mlx4_0 > > transport: InfiniBand (0) > > fw_ver: 2.32.5100 > > node_guid: f452:1403:00f5:4620 > > sys_image_guid: f452:1403:00f5:4623 > > vendor_id: 0x02c9 > > vendor_part_id: 4099 > > hw_ver: 0x1 > > board_id: MT_1100120019 > > phys_port_cnt: 1 > > port: 1 > > state: PORT_ACTIVE (4) > > max_mtu: 4096 (5) > > active_mtu: 4096 (5) > > sm_lid: 1 > > port_lid: 185 > > port_lmc: 0x00 > > link_layer: InfiniBand > > > > [root@pg-gpu01 ~]# sminfo > > sminfo: sm lid 1 sm guid 0xf452140300f62320, activity count 80878098 > > priority 0 state 3 SMINFO_MASTER > > > > Looks like the rebooted node is able to connect/contact IB/IB > subnetmanager > > > > > > > > > > On Mon, Apr 24, 2017 at 4:14 PM, Russell Dekema <[email protected]> > wrote: > >> > >> At first glance, this sounds like your Infiniband subnet manager may > >> be down or malfunctioning. In this case, nodes which were already up > >> when the subnet manager was working will continue to be able to > >> communicate over IB, but nodes which reboot after the SM goes down > >> will not. > >> > >> You can test this theory by running the 'ibv_devinfo' command on one > >> of your rebooted nodes. If the relevant IB port is in state PORT_INIT, > >> this confirms there is a problem with your subnet manager. > >> > >> Sincerely, > >> Rusty Dekema > >> > >> > >> > >> > >> On Mon, Apr 24, 2017 at 9:57 AM, Strikwerda, Ger > >> <[email protected]> wrote: > >> > Hi everybody, > >> > > >> > Here at the university of Groningen we are now experiencing a strange > >> > Lustre > >> > error. If a client reboots, it fails to mount the Lustre storage. The > >> > client > >> > is not able to reach the MSG service. The storage and nodes are > >> > communicating over IB and unitil now without any problems. It looks > like > >> > an > >> > issue inside LNET. Clients cannot LNET ping/connect the metadata and > or > >> > storage. But the clients are able to LNET ping each other. Clients > which > >> > not > >> > have been rebooted, are working fine and have their mounts on our > Lustre > >> > filesystem. > >> > > >> > Lustre client log: > >> > > >> > Lustre: Lustre: Build Version: 2.5.3-RC1--PRISTINE-2.6.32- > 573.el6.x86_64 > >> > LNet: Added LNI 172.23.54.51@o2ib [8/256/0/180] > >> > > >> > LustreError: 15c-8: MGC172.23.55.211@o2ib: The configuration from log > >> > 'pgdata01-client' failed (-5). This may be the result of communication > >> > errors between this node and the MGS, a bad configuration, or other > >> > errors. > >> > See the syslog for more information. > >> > LustreError: 3812:0:(llite_lib.c:1046:ll_fill_super()) Unable to > process > >> > log: -5 > >> > Lustre: Unmounted pgdata01-client > >> > LustreError: 3812:0:(obd_mount.c:1325:lustre_fill_super()) Unable to > >> > mount > >> > (-5) > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) > >> > 172.23.55.212@o2ib > >> > rejected: consumer defined fatal error > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) Skipped 1 > >> > previous > >> > similar message > >> > Lustre: 3765:0:(client.c:1918:ptlrpc_expire_one_request()) @@@ > Request > >> > sent > >> > has failed due to network error: [sent 1492789626/real 1492789626] > >> > req@ffff88105af2cc00 x1565303228072004/t0(0) > >> > o250->MGC172.23.55.211@[email protected]@o2ib:26/25 lens 400/544 e > 0 to > >> > 1 > >> > dl 1492789631 ref 1 fl Rpc:XN/0/ffffffff rc 0/-1 > >> > Lustre: 3765:0:(client.c:1918:ptlrpc_expire_one_request()) Skipped 1 > >> > previous similar message > >> > LustreError: 3826:0:(client.c:1083:ptlrpc_import_delay_req()) @@@ > send > >> > limit > >> > expired req@ffff882041ffc000 x1565303228071996/t0(0) > >> > o101->MGC172.23.55.211@[email protected]@o2ib:26/25 lens 328/344 e > 0 to > >> > 0 > >> > dl 0 ref 2 fl Rpc:W/0/ffffffff rc 0/-1 > >> > LustreError: 3826:0:(client.c:1083:ptlrpc_import_delay_req()) > Skipped 2 > >> > previous similar messages > >> > LustreError: 15c-8: MGC172.23.55.211@o2ib: The configuration from log > >> > 'pghome01-client' failed (-5). This may be the result of communication > >> > errors between this node and the MGS, a bad configuration, or other > >> > errors. > >> > See the syslog for more information. > >> > LustreError: 3826:0:(llite_lib.c:1046:ll_fill_super()) Unable to > process > >> > log: -5 > >> > > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) > >> > 172.23.55.212@o2ib > >> > rejected: consumer defined fatal error > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) Skipped 1 > >> > previous > >> > similar message > >> > LNet: 3755:0:(o2iblnd_cb.c:475:kiblnd_rx_complete()) Rx from > >> > 172.23.55.211@o2ib failed: 5 > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) > >> > 172.23.55.211@o2ib > >> > rejected: consumer defined fatal error > >> > LNetError: 2882:0:(o2iblnd_cb.c:2587:kiblnd_rejected()) Skipped 1 > >> > previous > >> > similar message > >> > LNet: 2882:0:(o2iblnd_cb.c:2072:kiblnd_peer_connect_failed()) > Deleting > >> > messages for 172.23.55.211@o2ib: connection failed > >> > LNet: 2882:0:(o2iblnd_cb.c:2072:kiblnd_peer_connect_failed()) > Deleting > >> > messages for 172.23.55.212@o2ib: connection failed > >> > LNet: 3754:0:(o2iblnd_cb.c:475:kiblnd_rx_complete()) Rx from > >> > 172.23.55.212@o2ib failed: 5 > >> > LNet: 3754:0:(o2iblnd_cb.c:475:kiblnd_rx_complete()) Skipped 17 > previous > >> > similar messages > >> > LNet: 2882:0:(o2iblnd_cb.c:2072:kiblnd_peer_connect_failed()) > Deleting > >> > messages for 172.23.55.211@o2ib: connection failed > >> > LNet: 3754:0:(o2iblnd_cb.c:475:kiblnd_rx_complete()) Rx from > >> > 172.23.55.212@o2ib failed: 5 > >> > LNet: 2882:0:(o2iblnd_cb.c:2072:kiblnd_peer_connect_failed()) > Deleting > >> > messages for 172.23.55.212@o2ib: connection failed > >> > > >> > LNET ping of a metadata-node: > >> > > >> > [root@pg-gpu01 ~]# lctl ping 172.23.55.211@o2ib > >> > failed to ping 172.23.55.211@o2ib: Input/output error > >> > > >> > LNET ping of the number 2 metadata-node: > >> > > >> > [root@pg-gpu01 ~]# lctl ping 172.23.55.212@o2ib > >> > failed to ping 172.23.55.212@o2ib: Input/output error > >> > > >> > LNET ping of a random compute-node: > >> > > >> > [root@pg-gpu01 ~]# lctl ping 172.23.52.5@o2ib > >> > 12345-0@lo > >> > 12345-172.23.52.5@o2ib > >> > > >> > LNET to OST01: > >> > > >> > [root@pg-gpu01 ~]# lctl ping 172.23.55.201@o2ib > >> > failed to ping 172.23.55.201@o2ib: Input/output error > >> > > >> > LNET to OST02: > >> > > >> > [root@pg-gpu01 ~]# lctl ping 172.23.55.202@o2ib > >> > failed to ping 172.23.55.202@o2ib: Input/output error > >> > > >> > 'normal' pings (on ip level) works fine: > >> > > >> > [root@pg-gpu01 ~]# ping 172.23.55.201 > >> > PING 172.23.55.201 (172.23.55.201) 56(84) bytes of data. > >> > 64 bytes from 172.23.55.201: icmp_seq=1 ttl=64 time=0.741 ms > >> > > >> > [root@pg-gpu01 ~]# ping 172.23.55.202 > >> > PING 172.23.55.202 (172.23.55.202) 56(84) bytes of data. > >> > 64 bytes from 172.23.55.202: icmp_seq=1 ttl=64 time=0.704 ms > >> > > >> > lctl on a rebooted node: > >> > > >> > [root@pg-gpu01 ~]# lctl dl > >> > > >> > lctl on a not rebooted node: > >> > > >> > [root@pg-node005 ~]# lctl dl > >> > 0 UP mgc MGC172.23.55.211@o2ib 94bd1c8a-512f-b920-9a4e-a6aced3d386d > 5 > >> > 1 UP lov pgtemp01-clilov-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 4 > >> > 2 UP lmv pgtemp01-clilmv-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 4 > >> > 3 UP mdc pgtemp01-MDT0000-mdc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 4 UP osc pgtemp01-OST0001-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 5 UP osc pgtemp01-OST0003-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 6 UP osc pgtemp01-OST0005-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 7 UP osc pgtemp01-OST0007-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 8 UP osc pgtemp01-OST0009-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 9 UP osc pgtemp01-OST000b-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 10 UP osc pgtemp01-OST000d-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 11 UP osc pgtemp01-OST000f-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 12 UP osc pgtemp01-OST0011-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 13 UP osc pgtemp01-OST0002-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 14 UP osc pgtemp01-OST0004-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 15 UP osc pgtemp01-OST0006-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 16 UP osc pgtemp01-OST0008-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 17 UP osc pgtemp01-OST000a-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 18 UP osc pgtemp01-OST000c-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 19 UP osc pgtemp01-OST000e-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 20 UP osc pgtemp01-OST0010-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 21 UP osc pgtemp01-OST0012-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 22 UP osc pgtemp01-OST0013-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 23 UP osc pgtemp01-OST0015-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 24 UP osc pgtemp01-OST0017-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 25 UP osc pgtemp01-OST0014-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 26 UP osc pgtemp01-OST0016-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 27 UP osc pgtemp01-OST0018-osc-ffff88206906d400 > >> > 281c441f-8aa3-ab56-8812-e459d308f47c 5 > >> > 28 UP lov pgdata01-clilov-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 4 > >> > 29 UP lmv pgdata01-clilmv-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 4 > >> > 30 UP mdc pgdata01-MDT0000-mdc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 31 UP osc pgdata01-OST0001-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 32 UP osc pgdata01-OST0003-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 33 UP osc pgdata01-OST0005-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 34 UP osc pgdata01-OST0007-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 35 UP osc pgdata01-OST0009-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 36 UP osc pgdata01-OST000b-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 37 UP osc pgdata01-OST000d-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 38 UP osc pgdata01-OST000f-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 39 UP osc pgdata01-OST0002-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 40 UP osc pgdata01-OST0004-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 41 UP osc pgdata01-OST0006-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 42 UP osc pgdata01-OST0008-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 43 UP osc pgdata01-OST000a-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 44 UP osc pgdata01-OST000c-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 45 UP osc pgdata01-OST000e-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 46 UP osc pgdata01-OST0010-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 47 UP osc pgdata01-OST0013-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 48 UP osc pgdata01-OST0015-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 49 UP osc pgdata01-OST0017-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 50 UP osc pgdata01-OST0014-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 51 UP osc pgdata01-OST0016-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 52 UP osc pgdata01-OST0018-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 53 UP osc pgdata01-OST0019-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 54 UP osc pgdata01-OST001a-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 55 UP osc pgdata01-OST001b-osc-ffff88204bab6400 > >> > 996b1742-82eb-281c-c322-e244672d5225 5 > >> > 56 UP lov pghome01-clilov-ffff88204bb50000 > >> > 9ae8f2a9-1cdf-901f-160c-66f70e4c10d1 4 > >> > 57 UP lmv pghome01-clilmv-ffff88204bb50000 > >> > 9ae8f2a9-1cdf-901f-160c-66f70e4c10d1 4 > >> > 58 UP mdc pghome01-MDT0000-mdc-ffff88204bb50000 > >> > 9ae8f2a9-1cdf-901f-160c-66f70e4c10d1 5 > >> > 59 UP osc pghome01-OST0011-osc-ffff88204bb50000 > >> > 9ae8f2a9-1cdf-901f-160c-66f70e4c10d1 5 > >> > 60 UP osc pghome01-OST0012-osc-ffff88204bb50000 > >> > 9ae8f2a9-1cdf-901f-160c-66f70e4c10d1 5 > >> > > >> > Please help, any clues/advice/hints/tips are appricated > >> > > >> > -- > >> > > >> > Vriendelijke groet, > >> > > >> > Ger Strikwerda > >> > Chef Special > >> > Rijksuniversiteit Groningen > >> > Centrum voor Informatie Technologie > >> > Unit Pragmatisch Systeembeheer > >> > > >> > Smitsborg > >> > Nettelbosje 1 > >> > 9747 AJ Groningen > >> > Tel. 050 363 9276 > >> > > >> > "God is hard, God is fair > >> > some men he gave brains, others he gave hair" > >> > > >> > > >> > _______________________________________________ > >> > lustre-discuss mailing list > >> > [email protected] > >> > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org > >> > > > > > > > > > > > -- > > > > Vriendelijke groet, > > > > Ger Strikwerda > > Chef Special > > Rijksuniversiteit Groningen > > Centrum voor Informatie Technologie > > Unit Pragmatisch Systeembeheer > > > > Smitsborg > > Nettelbosje 1 > > 9747 AJ Groningen > > Tel. 050 363 9276 > > > > "God is hard, God is fair > > some men he gave brains, others he gave hair" > -- Vriendelijke groet, Ger StrikwerdaChef Special Rijksuniversiteit Groningen Centrum voor Informatie Technologie Unit Pragmatisch Systeembeheer Smitsborg Nettelbosje 1 9747 AJ Groningen Tel. 050 363 9276 "God is hard, God is fair some men he gave brains, others he gave hair"
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