Solaris Practice-1 [ zfs ]

                          PRACTICE WORK-SHEET-1 [zfs]

Well, learned Solaris ?

OK…

Now time to have some Practice to check How Frequently or without looking to our notebook we can solve the things OR how much command we have on the Topics.

Let’s start with ZFS…

1.      What is zfs?

2.      List some benefits of zfs

3.      Compare ufs & zfs

4.      Why we should move to zfs?

5.      What is the basic requirement for zfs?

6.      Limitations of zfs

7.      What is “COW” in zfs?

8.      What is “dataset” and how many datasets zfs can support?

9.      What is zpool and how many datasets zpool can support?

10.  What is “vdev” in zfs and also define the types of vdevs?

11.  What is clone in zfs?

12.  Create a stripe volume “zstripe” with 2 disks                    [raid0]

13.  Create a mirrored volume “zmirror” with 2 disks                        [raid1]

14.  Run “zpool list” and “zpool status” to verify the creation

15.  Add 2 disks to “zmirror” to make it raid1+0 volume.       [raid1+0]

16.  Destroy the “zstripe” & “zmirror”

17.  Again using 4 disks create “zraid” pool with raid1+0       [raid1+0]

18.  Create a raidz1 volume “zm1” with 3 disks                       [raidz/raidz1]

19.  Create a raidz1 volume “zm2” with 6 disks                       [raidz2]

20.  Create a raidz1 volume “zm3” with 9 disks                       [raidz3]

21.  List & define the stats in “zpool status” command

22.  Add a spare disk to volume “zm1”

23.  Fire the command to check all the properties of zpool “zm1”

24.  Make the autoreplace flag on for “zm1”

25.  Remove one disk from “zm1” & reboot (from vm only, don’t remove from physical system)

26.  Now see the status of spare disk in ‘zpool status’ of zpool “zm1”

27.  Now reattach the disk in vm and replace in “zm1” and see the status of spare disk.

28.  Create a root mirror

29.  Create a snapshot for zpool “zm1”

30.  Create a file system “myfs” within “zm1”

31.  Take snapshot of zm1/myfs then Create some files within zm1/myfs and then restore from snapshot

32.  Find where your snapshot is located?

33.  Create 2 files within zm1/myfs then take snapshot, again create 2 files then again take snapshot, again create 2 files then take snapshot

34.  List all the snapshots

35.  Try to find out the differences between snapshots

36.  Try to roll back on first snapshot and see what it is saying

37.  List the snapshots

38.  Migrate a ufs root disk to zfs

39.  How to patch a zfs file system, explain in detail

40.  Make a dry run for creating a mirror zpool

41.  Define quota & refquota

42.  Create 2 FS zm1/myfs/test1 & zm1/myfs/test2 and set quota of 20mb on each with compression off

43.  Check the quota is working or not then remove quota from both FS’s.

44.  Now set the refquota of 30mb on 1 FS and check refquota is working or not?

45.  Create a zfs ‘zm1/home’ and set reservation on entire file system ‘zm1/home’

46.  Remove all quotas

47.  Share the FS ‘zm1/home’ to other systems

48.  Unshared the ‘zm1/home’

49.  Replace the faulty disk with new one.

50.  We had created snapshot zm1/myfs/test1@test1bkp, now restore this snapshot to zm1/home and see the results.

51.  Delete the zm1/home and the recover it

52.  What is Emulated Volume in zfs, create a 500mb emulated volume and use it as swap

53.  In similar way create a dump device

54.  Create a 100m FS zm1/scsivol2 and use it as iscsi volume on other system

55.  Rename the zm1/scsivol2 to zm1/scsiNEW

56.  What is clone in zfs? And how it is related with snapshot?

57.  Create a FS zm1/ctest, create two 10m files f1&f2 inside, create clone of ctest in zm1/myfs2

58.  Now we had cloned ctest at zm1/myfs2/ctestclone, restore the clone to ctestclone and rename it to ctest

59.  Send the snapshot to other system using zfs via ssh

60.  Make device c1t9d0 zm1 offline temporarily & make it online also do the clearing of device

61.  Command to display pool statistics

62.  Suppose you had migrated a zpool from older version of solaris, and in zpool status it is showing that some features are unavailable, what is the cause and solution?

63.  How to see the current version of zfs running on system?

64.  How to check the pool’s integrity and pool with detailed error?

SOME TROUBLE SHOOTING…………

65.  How to recover lost root password in zfs system?

66.  How to stop ongoing scrub operation?

67.  Newly created Pool “testpool” having some error and inaccessible, diagnose and figure out the solution.

68.  Here is a situation, I created a mirror vol named “testpool” with 2gb disks, now I realize that 2gb space is not enough for me, so I want to increase the disk capacity. How can I do that?

69.  What to do in system panic/reboot/pool import case

70.  One disk is suddenly got faulty in your zfs root mirror disk, and u found this in o/p

71.