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cluster:151 [2016/11/04 15:23]
hmeij07 		cluster:151 [2016/11/10 20:34]
hmeij07 [Meta Bakcup/Restore]
Line 24: Line 24:
  
   * ''cottontail:/usr/local/bin/beegfs-admin-gui''   * ''cottontail:/usr/local/bin/beegfs-admin-gui''
 +
 +==== Resync Data ====
 +
 +[[http://www.beegfs.com/wiki/StorageSynchronization|StorageSynchronization Link]]
 +
 +//If the primary storage target of a buddy group is unreachable, it will get marked as offline and a failover to the secondary target will be issued. In this case, the former secondary target will become the new primary target.//
 +
 +Testing out fail over and deletion of data on secondary then a full resync process:
 +
 + 
 +  * started a full --resyncstorage --mirrorgroupid=101 --timestamp=0
 +  * got --getentryinfo EntryID for a file in my /mnt/beegfs/home/path/to/file and did the same for the directory the file was located in
 +  * did a cat /mnt.beegfs/home/path/to/file on a client (just fine)
 +  * brought primary storage down
 +  * redid the cat above (it hangs for a couple of minutes, then displays the file content)
 +  * while primary down, I ran rm -rf   /mnt/beegfs/home/path/to/ removing directory holding file
 +  * a cat now generates the expected file not found error
 +  * brought up primary and started a full --resyncstorage --mirrorgroupid=101 --timestamp=0
 +  * the nr of files and dirs discovered is as expected lower by the correct values
 +  * when I now search for the EntryIDs obtained before they are gone from /data/beegfs-storage (as expected).
 +
 +Nice that it works.
 +
 +So you can full storage content mirror. You'll still need rsnapshots to recover lost data or point in time restores.
  
 ==== Mirror Data ==== ==== Mirror Data ====
Line 109: Line 133:
 [root@petaltail chroots]# ls -lh /var/chroots/data/beegfs_storage/buddymir/u2018/5817/9/60-58179513-30/178-581797C8-30 [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 -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 # copy on secondary
Line 115: Line 140:
 [root@swallowtail ~]# ls -lh /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 -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 # seems to work, notice the ''buddymir'' directory on primary/secondary
Line 140: Line 166:
    Ports: UDP: 8005; TCP: 8005    Ports: UDP: 8005; TCP: 8005
    Interfaces: ib1(RDMA) ib1(TCP) eth1(TCP) eth0(TCP)    Interfaces: ib1(RDMA) ib1(TCP) eth1(TCP) eth0(TCP)
 +               ^^^
  
 </code> </code>
Line 153: Line 179:
     * seems straightforward     * seems straightforward
   * do BEFORE populating XFS file systems   * do BEFORE populating XFS file systems
 +
 +==== Meta Backup/Restore =====
 +
 +[[http://www.fhgfs.com/wiki/wikka.php?wakka=FAQ#ea_backup|External Link]]
 +
 +<code>
 +
 +# latest tar
 +rpm -Uvh /sanscratch/tmp/beegfs/tar-1.23-15.el6_8.x86_64.rpm
 +
 +# backup
 +cd /data; tar czvf /sanscratch/tmp/beegfs/meta-backup/n38-meta.tar.gz beegfs_meta/ --xattrs
 +
 +# restore
 +cd /data;  tar xvf /sanscratch/tmp/beegfs/meta-backup/n38-meta.tar.gz --xattrs
 +
 +# test
 +cd /data; diff -r beegfs_meta beegfs_meta.orig
 +# no results
 +
 +</code>
 +
 +
 +
 +==== Resync Meta ====
 +
 +[[http://www.beegfs.com/wiki/AboutMirroring2012#hn_59ca4f8bbb_4|External Link]]
  
 ==== Mirror Meta ==== ==== Mirror Meta ====
 +
 +//Metadata mirroring can currently not be disabled after it has been enabled for a certain directory//
  
 Definitely want Meta content mirrored, that way I can use the n38-n45 nodes with local 15K disk, plus maybe cottontail2 (raid 1 with hot and cold spare). Definitely want Meta content mirrored, that way I can use the n38-n45 nodes with local 15K disk, plus maybe cottontail2 (raid 1 with hot and cold spare).
Line 182: Line 237:
 [root@sharptail ~]# ssh n38 find /data/beegfs_meta -name 3-581392E1-31 [root@sharptail ~]# ssh n38 find /data/beegfs_meta -name 3-581392E1-31
 /data/beegfs_meta/mirror/49.dentries/54/6C/0-581392F0-30/#fSiDs#/3-581392E1-31 /data/beegfs_meta/mirror/49.dentries/54/6C/0-581392F0-30/#fSiDs#/3-581392E1-31
-                  ^^^^^^+                  ^^^^^^ ^^
 # and find # and find
 [root@sharptail ~]# ssh n39 find /data/beegfs_meta -name 3-581392E1-31 [root@sharptail ~]# ssh n39 find /data/beegfs_meta -name 3-581392E1-31
cluster/151.txt ยท Last modified: 2016/12/06 20:14 by hmeij07

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