Forward to the correct mailing list. jim is the most qualified for any pnfs-blocks issues cheer Boaz On 03/28/2011 03:35 PM, Phil C wrote: > > I was able to get the pNFS file-layout code functioning with 1 DS, and a MDS and > 1 Client. I need to get block layout working for a research project I am > working on, however have so far been unable to get this working. > > I would very much appreciate help or suggestions (or a kick in the head if I'm > doing something stupid). > > I referenced the wiki pages on client and DS setup and referenced the two > threads I saw on this topic, however cannot get block-layout working. > > Below I have shown the steps I have taken to try and get this working (sorry for > the long list). > > I have also shown the testing and troubleshooting I have undertaken, and the > results there-of. > > Data Server: 192.168.1.2 MDS: 192.168.1.1 Client: 192.168.1.3 > > On Data-server(s) create folder with mkdir /pnfs > > On Data-server(s) Edit /etc/exports. Add the string: > /pnfs *(rw, sync,fsid=0,insecure,no_subtree_check,pnfs,no_root_squash) > > On Data-server(s) type parted /dev/sdb > (parted) mklabel gpt > (parted) mklabel 1 <Provide ext4 file-system, and partition start and end> > (parted> print > Model: ATA SSDSA2SH06â (scsi) > Disk /dev/sdb: 64.0GB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > Number Start End size File system Name Flags > 1 1049kB 64.0GB 64.0GB ext4 1 > > On Data-server(s) type mkfs.ext4 âb 4096 /dev/sdb1 > > On Data-server(s) type /etc/init.d/iptables stop > > On Data-server(s) type /etc/init.d/tgtd start > > On Data-server(s) type: > tgtadm âlld iscsi âop new âmode target âtid 1 âT > iqn.2011-03.com.intel:openblock > > On Data-server(s) type > tgtadm âlld iscsi âmode logicalunit âop new âtid 1 âlun 1 âbacking-store /dev/sdb1 > > On Data-server(s) type > tgtadm âlld iscsi âmode target âop bind âtid 1 âinitiator-address ALL > > On Data-server(s) type tgtadm âlld iscsi âop show âmode target > > On Data-server(s) type mount /dev/sdb1 /pnfs > > On Data-server(s) type service nfs restart > > On Data-server(s) cd to the ctl directory and type ./ctl âu & > See: âProcessing: MSG_VERS : Version: 8 > > On MDS copy the spnfsd.conf file from pNFS_Packages/pnfs-nfs-utils/utils to > /etc/spnfsd.conf and edit it for 1 DS and the proper DS-Mount-Directory, DS1_IP, > and DS1_Root. > [General] > Verbosity = 1 > Stripe-size = 8192 > Dense-striping = 0 > Pipefs-Directory = /var/lib/nfs/rpc_pipefs > DS-Mount-Directory = /spnfs > [DataServers] > NumDS = 1 > DS1_IP= 192.168.1.2 > DS1_PORT= 2049 > DS1_ROOT = /pnfs > DS1_ID = 1 > > On MDS create the /spnfs/192.168.1.2 folder > > On MDS edit /etc/exports and add below string: > / *(rw, sync,fsid=0,insecure,no_subtree_check,pnfs,no_root_squash) > > On MDS type mount 192.168.1.2:/pnfs /spnfs/192.168.1.2 > See on the DS â the ctl application prints out: > Processing: MSG_VERS : Version: 8 > > On MDS disable iptables with /etc/init.d/iptables stop > > On MDS type service nfs restart â See: > Starting NFS services: [ OK ] > Starting NFS quotas: [ OK ] > Starting NFS daemon: [ OK ] > Starting NFS mountd: [ OK ] > > On MDS type modprobe nfsd to start the NFS daemon > > On MDS type spnfsd to start service on MDS server. > See recapitulation of /etc/spnfsd.confâ; > > On the Client disable iptables with /etc/init.d/iptables stop > > On the Client log onto the Data-Server iSCSI target by typing: > iscsi âm discovery ât st âp 192.168.1.2 âl > > On the Client start the blkmapd service by typing service blkmapd start > > On the Client run /usr/sbin/blkmapd âf > > On the Client mount MDS server by typing: > mount ât nfs4 âo minorversion =1 192.168.1.1:/spnfs /mnt > > TESTING: > On the Client generate some activity in /mnt (copy file from local client disk > to /mnt) > > On the Client cat /proc/self/mountstats and look for LAYOUT and see: > nfsv4: bm0=0xfdffbfff,bm1=0x40f9be3e,acl=0x3,sessions,pnfs=not configured > LAYOUTGET: 0 0 0 0 0 0 0 0 > LAYTOUTCOMMIT: 0 0 0 0 0 0 0 0 > LAYOUTRETURN: 0 0 0 0 0 0 0 0 > > On the Client I see in /mnt the file I copied > On the MDS I see in /spnfs (note: not /spnfs/192.168.1.2) the file I copied > from the Client > On the MDS I see in /spnfs/192.168.1.2 a file called 2359299.1868952557 > On the DS I see in /pnfs a file called 2359299.1868952557 > > TROUBLESHOOTING: > Read the new-ish trouble shooting information on the wiki-page. > > 1 â Ran more traffic and still see the same information from the clientâs > /proc/self/mountstats > > 2 â Ran /usr/sbin/blkmapd âf on the Client and saw no output > > 3 â Looked at /var/log/messages on all 3 machines. > Saw nothing on either the MDS or the DS. > On the Client I see the innocuous: > âFS-Cache: Loadedâ > Registering the id_resolver key type > FS-Cache: Netfs ânfsâ registered for caching > > 4 â On the Client I ran âmountâ and see I have: > 192.168.1.1:/spnf on /mnt type nfs4 > (rw,minorversion=1,addr192.168.1.1,clientaddr=192.168.1.3) > > <Note: no output from the running â/usr/sbin/blkmapd âfâ when I ran the mount > command> > > 5 â On the Client I verified I have an iSCSI target attached. > > 6 â On the Client I did an lsmod|grep bllock to see I had blocklayoutdriver > loaded and used by nfs and sunrpc > > QUESTIONS: > 1 â do you see anything missing or wrong about my procedure? > > 2 â The MDS mounts the DS using âmount 192.168.1.2:/pnfs /spnfs/192.168.1.2â. > Does the MDS also/instead need to act as an iSCSI initiator and discover/logon > to the DS iSCSI target? > > 3 â from /proc/self/mountstats on the client I see I do NOT in fact have > pnfs=LAYOUT_BLOCK_VOLUEM so I assume we can suspect we do not have a pNFS mount. > What does this mean and how can I address the issue? > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
