MapR-FS to ONTAP NFS
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This section provides the detailed steps needed to move MapR-FS data into ONTAP NFS by using NetApp XCP.
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Provision three LUNs for each MapR node and give the LUNs ownership of all MapR nodes.
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During installation, choose newly added LUNs for MapR cluster disks that are used for MapR-FS.
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Install a MapR cluster according to the MapR 6.1 documentation.
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Check the basic Hadoop operations using MapReduce commands such as
hadoop jar xxx. -
Keep customer data in MapR-FS. For example, we generated approximately a terabyte of sample data in MapR-FS by using Teragen.
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Configure MapR-FS as NFS export.
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Disable the nlockmgr service on all MapR nodes.
root@workr-138: ~$ rpcinfo -p program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper 100003 4 tcp 2049 nfs 100227 3 tcp 2049 nfs_acl 100003 4 udp 2049 nfs 100227 3 udp 2049 nfs_acl 100021 3 udp 55270 nlockmgr 100021 4 udp 55270 nlockmgr 100021 3 tcp 35025 nlockmgr 100021 4 tcp 35025 nlockmgr 100003 3 tcp 2049 nfs 100005 3 tcp 2049 mountd 100005 1 tcp 2049 mountd 100005 3 udp 2049 mountd 100005 1 udp 2049 mountd root@workr-138: ~$ root@workr-138: ~$ rpcinfo -d 100021 3 root@workr-138: ~$ rpcinfo -d 100021 4 -
Export specific folders from MapR-FS on all MapR nodes in the
/opt/mapr/conf/exportsfile. Do not export the parent folder with different permissions when you export sub folders.[mapr@workr-138 ~]$ cat /opt/mapr/conf/exports # Sample Exports file # for /mapr exports # <Path> <exports_control> #access_control -> order is specific to default # list the hosts before specifying a default for all # a.b.c.d,1.2.3.4(ro) d.e.f.g(ro) (rw) # enforces ro for a.b.c.d & 1.2.3.4 and everybody else is rw # special path to export clusters in mapr-clusters.conf. To disable exporting, # comment it out. to restrict access use the exports_control # #/mapr (rw) #karthik /mapr/my.cluster.com/tmp/testnfs /maprnfs3 (rw) #to export only certain clusters, comment out the /mapr & uncomment. #/mapr/clustername (rw) #to export /mapr only to certain hosts (using exports_control) #/mapr a.b.c.d(rw),e.f.g.h(ro) # export /mapr/cluster1 rw to a.b.c.d & ro to e.f.g.h (denied for others) #/mapr/cluster1 a.b.c.d(rw),e.f.g.h(ro) # export /mapr/cluster2 only to e.f.g.h (denied for others) #/mapr/cluster2 e.f.g.h(rw) # export /mapr/cluster3 rw to e.f.g.h & ro to others #/mapr/cluster2 e.f.g.h(rw) (ro) #to export a certain cluster, volume or a subdirectory as an alias, #comment out /mapr & uncomment #/mapr/clustername /alias1 (rw) #/mapr/clustername/vol /alias2 (rw) #/mapr/clustername/vol/dir /alias3 (rw) #only the alias will be visible/exposed to the nfs client not the mapr path, host options as before [mapr@workr-138 ~]$
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Refresh the MapR-FS NFS service.
root@workr-138: tmp$ maprcli nfsmgmt refreshexports ERROR (22) - You do not have a ticket to communicate with 127.0.0.1:9998. Retry after obtaining a new ticket using maprlogin root@workr-138: tmp$ su - mapr [mapr@workr-138 ~]$ maprlogin password -cluster my.cluster.com [Password for user 'mapr' at cluster 'my.cluster.com': ] MapR credentials of user 'mapr' for cluster 'my.cluster.com' are written to '/tmp/maprticket_5000' [mapr@workr-138 ~]$ maprcli nfsmgmt refreshexports
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Assign a virtual IP range to a specific server or a set of servers in the MapR cluster. Then the MapR cluster assigns an IP to a specific server for NFS data access. The IPs enable high availability, which means that, if a server or network with a particular IP experiences failure, the next IP from the range of IPs can be used for NFS access.
If you would like to provide NFS access from all MapR nodes, then you can assign a set of virtual IPs to each server, and you can use the resources from each MapR node for NFS data access. 
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Check the virtual IPs assigned on each MapR node and use them for NFS data access.
root@workr-138: ~$ ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens3f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:5d:f9 brd ff:ff:ff:ff:ff:ff inet 10.63.150.138/24 brd 10.63.150.255 scope global noprefixroute ens3f0 valid_lft forever preferred_lft forever inet 10.63.150.96/24 scope global secondary ens3f0:~m0 valid_lft forever preferred_lft forever inet 10.63.150.97/24 scope global secondary ens3f0:~m1 valid_lft forever preferred_lft forever inet6 fe80::921b:eff:fed1:5df9/64 scope link valid_lft forever preferred_lft forever 3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:af:b4 brd ff:ff:ff:ff:ff:ff 4: ens3f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:5d:fa brd ff:ff:ff:ff:ff:ff 5: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000 link/ether 90:1b:0e:d1:af:b5 brd ff:ff:ff:ff:ff:ff [root@workr-138: ~$ [root@workr-140 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens3f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:5e:03 brd ff:ff:ff:ff:ff:ff inet 10.63.150.140/24 brd 10.63.150.255 scope global noprefixroute ens3f0 valid_lft forever preferred_lft forever inet 10.63.150.92/24 scope global secondary ens3f0:~m0 valid_lft forever preferred_lft forever inet6 fe80::921b:eff:fed1:5e03/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:af:9a brd ff:ff:ff:ff:ff:ff 4: ens3f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 90:1b:0e:d1:5e:04 brd ff:ff:ff:ff:ff:ff 5: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000 link/ether 90:1b:0e:d1:af:9b brd ff:ff:ff:ff:ff:ff [root@workr-140 ~]# -
Mount the NFS- exported MapR-FS using the assigned virtual IP for checking the NFS operation. However, this step is not required for data transfer using NetApp XCP.
root@workr-138: tmp$ mount -v -t nfs 10.63.150.92:/maprnfs3 /tmp/testmount/ mount.nfs: timeout set for Thu Dec 5 15:31:32 2019 mount.nfs: trying text-based options 'vers=4.1,addr=10.63.150.92,clientaddr=10.63.150.138' mount.nfs: mount(2): Protocol not supported mount.nfs: trying text-based options 'vers=4.0,addr=10.63.150.92,clientaddr=10.63.150.138' mount.nfs: mount(2): Protocol not supported mount.nfs: trying text-based options 'addr=10.63.150.92' mount.nfs: prog 100003, trying vers=3, prot=6 mount.nfs: trying 10.63.150.92 prog 100003 vers 3 prot TCP port 2049 mount.nfs: prog 100005, trying vers=3, prot=17 mount.nfs: trying 10.63.150.92 prog 100005 vers 3 prot UDP port 2049 mount.nfs: portmap query retrying: RPC: Timed out mount.nfs: prog 100005, trying vers=3, prot=6 mount.nfs: trying 10.63.150.92 prog 100005 vers 3 prot TCP port 2049 root@workr-138: tmp$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda7 84G 48G 37G 57% / devtmpfs 126G 0 126G 0% /dev tmpfs 126G 0 126G 0% /dev/shm tmpfs 126G 19M 126G 1% /run tmpfs 126G 0 126G 0% /sys/fs/cgroup /dev/sdd1 3.7T 201G 3.5T 6% /mnt/sdd1 /dev/sda6 946M 220M 726M 24% /boot tmpfs 26G 0 26G 0% /run/user/5000 gpfs1 7.3T 9.1G 7.3T 1% /gpfs1 tmpfs 26G 0 26G 0% /run/user/0 localhost:/mapr 100G 0 100G 0% /mapr 10.63.150.92:/maprnfs3 53T 8.4G 53T 1% /tmp/testmount root@workr-138: tmp$
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Configure NetApp XCP to transfer data from the MapR-FS NFS gateway to ONTAP NFS.
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Configure the catalog location for XCP.
[root@hdp2 linux]# cat /opt/NetApp/xFiles/xcp/xcp.ini # Sample xcp config [xcp] #catalog = 10.63.150.51:/gpfs1 catalog = 10.63.150.213:/nc_volume1
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Copy the license file to
/opt/NetApp/xFiles/xcp/.root@workr-138: src$ cd /opt/NetApp/xFiles/xcp/ root@workr-138: xcp$ ls -ltrha total 252K drwxr-xr-x 3 root root 16 Apr 4 2019 .. -rw-r--r-- 1 root root 105 Dec 5 19:04 xcp.ini drwxr-xr-x 2 root root 59 Dec 5 19:04 . -rw-r--r-- 1 faiz89 faiz89 336 Dec 6 21:12 license -rw-r--r-- 1 root root 192 Dec 6 21:13 host -rw-r--r-- 1 root root 236K Dec 17 14:12 xcp.log root@workr-138: xcp$
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Activate XCP using the
xcp activatecommand. -
Check the source for NFS export.
[root@hdp2 linux]# ./xcp show 10.63.150.92 XCP 1.4-17914d6; (c) 2019 NetApp, Inc.; Licensed to Karthikeyan Nagalingam [NetApp Inc] until Wed Feb 5 11:07:27 2020 getting pmap dump from 10.63.150.92 port 111... getting export list from 10.63.150.92... sending 1 mount and 4 nfs requests to 10.63.150.92... == RPC Services == '10.63.150.92': TCP rpc services: MNT v1/3, NFS v3/4, NFSACL v3, NLM v1/3/4, PMAP v2/3/4, STATUS v1 '10.63.150.92': UDP rpc services: MNT v1/3, NFS v4, NFSACL v3, NLM v1/3/4, PMAP v2/3/4, STATUS v1 == NFS Exports == Mounts Errors Server 1 0 10.63.150.92 Space Files Space Files Free Free Used Used Export 52.3 TiB 53.7B 8.36 GiB 53.7B 10.63.150.92:/maprnfs3 == Attributes of NFS Exports == drwxr-xr-x --- root root 2 2 10m51s 10.63.150.92:/maprnfs3 1.77 KiB in (8.68 KiB/s), 3.16 KiB out (15.5 KiB/s), 0s. [root@hdp2 linux]# -
Transfer the data using XCP from multiple MapR nodes from multiple source IPs and multiple destination IPs (ONTAP LIFs).
root@workr-138: linux$ ./xcp_yatin copy --parallel 20 10.63.150.96,10.63.150.97:/maprnfs3/tg4 10.63.150.85,10.63.150.86:/datapipeline_dataset/tg4_dest XCP 1.6-dev; (c) 2019 NetApp, Inc.; Licensed to Karthikeyan Nagalingam [NetApp Inc] until Wed Feb 5 11:07:27 2020 xcp: WARNING: No index name has been specified, creating one with name: autoname_copy_2019-12-06_21.14.38.652652 xcp: mount '10.63.150.96,10.63.150.97:/maprnfs3/tg4': WARNING: This NFS server only supports 1-second timestamp granularity. This may cause sync to fail because changes will often be undetectable. 130 scanned, 128 giants, 3.59 GiB in (723 MiB/s), 3.60 GiB out (724 MiB/s), 5s 130 scanned, 128 giants, 8.01 GiB in (889 MiB/s), 8.02 GiB out (890 MiB/s), 11s 130 scanned, 128 giants, 12.6 GiB in (933 MiB/s), 12.6 GiB out (934 MiB/s), 16s 130 scanned, 128 giants, 16.7 GiB in (830 MiB/s), 16.7 GiB out (831 MiB/s), 21s 130 scanned, 128 giants, 21.1 GiB in (907 MiB/s), 21.1 GiB out (908 MiB/s), 26s 130 scanned, 128 giants, 25.5 GiB in (893 MiB/s), 25.5 GiB out (894 MiB/s), 31s 130 scanned, 128 giants, 29.6 GiB in (842 MiB/s), 29.6 GiB out (843 MiB/s), 36s …. [root@workr-140 linux]# ./xcp_yatin copy --parallel 20 10.63.150.92:/maprnfs3/tg4_2 10.63.150.85,10.63.150.86:/datapipeline_dataset/tg4_2_dest XCP 1.6-dev; (c) 2019 NetApp, Inc.; Licensed to Karthikeyan Nagalingam [NetApp Inc] until Wed Feb 5 11:07:27 2020 xcp: WARNING: No index name has been specified, creating one with name: autoname_copy_2019-12-06_21.14.24.637773 xcp: mount '10.63.150.92:/maprnfs3/tg4_2': WARNING: This NFS server only supports 1-second timestamp granularity. This may cause sync to fail because changes will often be undetectable. 130 scanned, 128 giants, 4.39 GiB in (896 MiB/s), 4.39 GiB out (897 MiB/s), 5s 130 scanned, 128 giants, 9.94 GiB in (1.10 GiB/s), 9.96 GiB out (1.10 GiB/s), 10s 130 scanned, 128 giants, 15.4 GiB in (1.09 GiB/s), 15.4 GiB out (1.09 GiB/s), 15s 130 scanned, 128 giants, 20.1 GiB in (953 MiB/s), 20.1 GiB out (954 MiB/s), 20s 130 scanned, 128 giants, 24.6 GiB in (928 MiB/s), 24.7 GiB out (929 MiB/s), 25s 130 scanned, 128 giants, 29.0 GiB in (877 MiB/s), 29.0 GiB out (878 MiB/s), 31s 130 scanned, 128 giants, 33.2 GiB in (852 MiB/s), 33.2 GiB out (853 MiB/s), 36s 130 scanned, 128 giants, 37.8 GiB in (941 MiB/s), 37.8 GiB out (942 MiB/s), 41s 130 scanned, 128 giants, 42.0 GiB in (860 MiB/s), 42.0 GiB out (861 MiB/s), 46s 130 scanned, 128 giants, 46.1 GiB in (852 MiB/s), 46.2 GiB out (853 MiB/s), 51s 130 scanned, 128 giants, 50.1 GiB in (816 MiB/s), 50.2 GiB out (817 MiB/s), 56s 130 scanned, 128 giants, 54.1 GiB in (819 MiB/s), 54.2 GiB out (820 MiB/s), 1m1s 130 scanned, 128 giants, 58.5 GiB in (897 MiB/s), 58.6 GiB out (898 MiB/s), 1m6s 130 scanned, 128 giants, 62.9 GiB in (900 MiB/s), 63.0 GiB out (901 MiB/s), 1m11s 130 scanned, 128 giants, 67.2 GiB in (876 MiB/s), 67.2 GiB out (877 MiB/s), 1m16s
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Check the load distribution on the storage controller.
Hadoop-AFF8080::*> statistics show-periodic -interval 2 -iterations 0 -summary true -object nic_common -counter rx_bytes|tx_bytes -node Hadoop-AFF8080-01 -instance e3b Hadoop-AFF8080: nic_common.e3b: 12/6/2019 15:55:04 rx_bytes tx_bytes -------- -------- 879MB 4.67MB 856MB 4.46MB 973MB 5.66MB 986MB 5.88MB 945MB 5.30MB 920MB 4.92MB 894MB 4.76MB 902MB 4.79MB 886MB 4.68MB 892MB 4.78MB 908MB 4.96MB 905MB 4.85MB 899MB 4.83MB Hadoop-AFF8080::*> statistics show-periodic -interval 2 -iterations 0 -summary true -object nic_common -counter rx_bytes|tx_bytes -node Hadoop-AFF8080-01 -instance e9b Hadoop-AFF8080: nic_common.e9b: 12/6/2019 15:55:07 rx_bytes tx_bytes -------- -------- 950MB 4.93MB 991MB 5.84MB 959MB 5.63MB 914MB 5.06MB 903MB 4.81MB 899MB 4.73MB 892MB 4.71MB 890MB 4.72MB 905MB 4.86MB 902MB 4.90MB
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