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--- linux_storage_zfs [2020/02/06 17:45] – andonovj
+++ linux_storage_zfs [2020/02/13 18:26] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 =====Overview=====
+ZFS stands for Zettabyte File system and to save you a lot of boring reading it is a file system which protects agains data corruption provide high redundancy and high availability. It was designed by Sun Microsystems and there are two implementations in nutshell:
+  * Oracle ZFS
+  * OpenProject ZFS
+Both implementations are pretty close to each other and both are widely used in the IT world to provide availability FS with high protection and performance.
 ZFS is native to Oracle NAS Storage Appliance. With ZFS you can create a pool which you can share with out appliances through either NFS or Samba.
@@ Line 15: / Line 21: @@
 </code>
-The following command, will create you a pool comprised by 10 disks in raid-5 configuration with double parity. The pool name is called: "tank".
+The following command, will create you a pool comprised by 10 disks in raid-5 configuration with double parity. The pool name is called: "tank" and with compression lz4. You can choose one of these compression algorithms by the way :)
+  * On
+  * Off
+  * lzjb
+  * gzip
+  * gzip[1-9]
+  * zle
+  * lz4 <- The one used here and it is pretty good
 You can also list the status of the created pool as follows:
@@ Line 39: / Line 53: @@
 <code:none| Check Integrity>
-[root@hostname ~]# zpool status -v tank
+[root@hostname ~]# zpool scrub tank
+[root@hostname ~]# zpool status
   pool: tank
  state: ONLINE
- scrub: scrub completed after 0h7m with 0 errors on Tue Tue Feb  2 12:54:00 2010
+  scan: scrub repaired 0B in 0h56m with 0 errors on Mon Aug 12 12:40:46 2019
 config:
         NAME        STATE     READ WRITE CKSUM
         tank        ONLINE       0     0     0
-         raidz2:
+          raidz2-0  ONLINE       0     0     0
-		disk1      ONLINE 	0	0	0
+            disk1   ONLINE       0     0     0
-		disk2      ONLINE 	0	0	0
+            disk2   ONLINE       0     0     0
-		disk3      ONLINE 	0	0	0
+            disk3   ONLINE       0     0     0
-		disk4      ONLINE 	0	0	0
+            disk4   ONLINE       0     0     0
-		disk5      ONLINE 	0	0	0
+            disk5   ONLINE       0     0     0
-		disk6      ONLINE 	0	0	0
+            disk6   ONLINE       0     0     0
-		disk7      ONLINE 	0	0	0
+            disk7   ONLINE       0     0     0
-		disk8      ONLINE 	0	0	0
+            disk8   ONLINE       0     0     0
-		disk9      ONLINE 	0	0	0
+            disk9   ONLINE       0     0     0
-		disk10     ONLINE 	0	0	0
+            disk10  ONLINE       0     0     0
 errors: No known data errors
@@ Line 62: / Line 78: @@
 P.S. you can stop the scrubbing with: zpool scrub -s tank
+[root@hostname ~]# zpool scrub -s tank
 </code>
@@ Line 67: / Line 84: @@
 ====Create file system====
-The ZFS will be shared either over SMB (Samba) or NFS(Network File system) to other machines. NFS is create way to setup Oracle RAC (with Direct NFS of course) and Samba is great way for a backup solution.
+The ZFS will be shared either over SMB (Samba) or NFS(Network File system) to other machines. NFS is great way to setup Oracle RAC (with Direct NFS of course) and Samba is great way for a backup solution.
 So let's create NFS :)
@@ Line 121: / Line 138: @@
 It is uselessly to say that the NFS port (111) should be allowed both ways :)
 For example: server_one (111) <-> (111) Oracle_NAS_Server (111) <-> (111) server_two
 Of course, such configuration (with READ-ONLY) isn't suitable for RAC, if you don't want to hit your head in the wall long time. If you wish, to do so, please go ahead and try to install RAC on that :)
@@ Line 148: / Line 169: @@
 Cheers and enjoy :)
+=====Compression Options=====
+For more info you can check here :) [[https://www.servethehome.com/the-case-for-using-zfs-compression/ | Compression Algorithms]]