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--- cluster:151 [2016/10/31 17:04]
hmeij07 [/mnt/beegfs/]
+++ cluster:151 [2016/11/03 13:45]
hmeij07 [Mirror Data]
@@ Line 25: / Line 25: @@
   * ''cottontail:/usr/local/bin/beegfs-admin-gui''
-==== Quota Enable and Enforce ====
+==== Mirror Data ====
+** Before **
+<code>
+[root@cottontail2 ~]# beegfs-df
+METADATA SERVERS:
+TargetID        Pool        Total         Free    %      ITotal       IFree    %
+========        ====        =====         ====    =      ======       =====    =
+         low      29.5GiB      23.3GiB  79%        1.9M        1.5M  82%
+         low      29.5GiB      23.1GiB  78%        1.9M        1.5M  82%
+         low     122.3GiB     116.7GiB  95%        7.8M        7.6M  98%
+STORAGE TARGETS:
+TargetID        Pool        Total         Free    %      ITotal       IFree    %
+========        ====        =====         ====    =      ======       =====    =
+         low     291.4GiB      50.6GiB  17%       18.5M       18.4M 100%
+         low     291.2GiB      61.8GiB  21%       18.5M       15.8M  85%
+</code>
+** Before **
+<code>
+# define buddygroup - these are storage target IDs
+[root@n7 ~]# beegfs-ctl --addmirrorgroup --primary=13601 --secondary=21701 --groupid=101
+Mirror buddy group successfully set: groupID 101 -> target IDs 13601, 21701
+[root@n7 ~]# beegfs-ctl --listmirrorgroups
+     BuddyGroupID   PrimaryTargetID SecondaryTargetID
+     ============   =============== =================
+             13601             21701
+# enable mirroring for data by directory -numTargets needs to be set to max nr of storage servers?
+[root@n7 ~]# beegfs-ctl --setpattern --buddymirror /mnt/beegfs/hmeij-mirror-data --chunksize=512k --numtargets=2
+New chunksize: 524288
+New number of storage targets: 2
+Path: /hmeij-mirror-data
+Mount: /mnt/beegfs
+# copy some contents in (~hmeij is 10G)
+[root@n7 ~]# rsync -vac --bwlimit /home/hmeij /mnt/beegfs/hmeij-mirror-data/
+</code>
+** After **
+<code>
+[root@n7 ~]# beegfs-df
+METADATA SERVERS: (almost no changes...)
+STORAGE TARGETS: (each target less circa 10G)
+TargetID        Pool        Total         Free    %      ITotal       IFree    %
+========        ====        =====         ====    =      ======       =====    =
+         low     291.4GiB      40.7GiB  14%       18.5M       18.4M  99%
+         low     291.2GiB      51.9GiB  18%       18.5M       15.8M  85%
+# lets find an object
+[root@n7 ~]# beegfs-ctl --getentryinfo /mnt/beegfs/hmeij-mirror-data/hmeij/xen/bvm1.img
+Path: /hmeij-mirror-data/hmeij/xen/bvm1.img
+Mount: /mnt/beegfs
+EntryID: 178-581797C8-30
+Metadata node: n38 [ID: 48]
+Stripe pattern details:
++ Type: Buddy Mirror
++ Chunksize: 512K
++ Number of storage targets: desired: 2; actual: 1
++ Storage mirror buddy groups:
+  + 101
+# original
+[root@n7 ~]# ls -lh /mnt/beegfs/hmeij-mirror-data/hmeij/xen/bvm1.img
+-rwxr-xr-x 1 hmeij its 4.9G 2014-04-07 13:39 /mnt/beegfs/hmeij-mirror-data/hmeij/xen/bvm1.img
+# copy on primary
+[root@petaltail chroots]# ls -lh /var/chroots/data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30
+-rw-rw-rw- 1 root root 4.9G Apr  7  2014 /var/chroots/data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30
+# copy on secondary
+[root@swallowtail ~]# find /data/beegfs_storage -name 178-581797C8-30
+/data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30
+[root@swallowtail ~]# ls -lh /data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30
+-rw-rw-rw- 1 root root 4.9G Apr  7  2014 /data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30
+# seems to work, notice the ''buddymir'' directory on primary/secondary
+</code>
+==== Quota ====
   * [[http://www.beegfs.com/wiki/EnableQuota|External Link]]

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