Zfl list says that the data-set is referring to 7,83G of data, and that includes snapshots & clones. Df does not include snapshots/clones in its calculations and only shows 32K, likely the minimum size. So some version of your data should be there, but my understanding is limited beyond that. This is used to designate a set of devices to be used as a spare in case too many errors are reported on a device in a data vdev. We can see that there’s a 1GB file in datapool/bob.
By turning on the compression property, all new blocks written will be compressed while the existing blocks will remain in their original state. To set quotas and reservations, use the zfs set command. Now, instead Create a Movie Video Streaming Website Medium of mounting the second SMB share onto solaris11-2 using the Oracle Solaris 11.1 command line, let’s accomplish this task using Microsoft Windows. Notice that when the pool is imported, the NFS shares come back.
File-system/Volume related commands
Unlike other file system and volume managers, ZFS provides hierarchical datasets , allowing a single pool to provide many storage choices. As before, we have created a simple mirrored pool of two disks. In this case, the disk devices are real disks, not files. In this case we’ve told ZFS to use the entire disk . If the disk was not labeled, ZFS will write a default label.
Oracle Solaris 11 allows us to share a ZFS file system using the Server Message Block protocol that was originally created by Microsoft. The procedure for sharing files using SMB is similar to sharing files using NFS and, honestly, it’s so easy. I have attached the old drive image to the new solaris 11.3 vm and have booted the vm. Nothing appears auto-mounted (though, there are a lot of items listed when I type ‘mount’). Connect and share knowledge within a single location that is structured and easy to search. Since the data errors were injected silently, we had to tell ZFS to compare all of the replicas.
- Expanding a volume is just a matter of setting the dataset property volsize to a new value.
- The root password is the password you defined when you have imported Oracle Solaris 11 VM appliance into Oracle VM VirtualBox.
- You can also set the default mount point for a pool’s file system at creation time by using zpool create’s -m option.
- Let’s begin by creating a simple zpool, called datapool.
- For more information about creating pools, see Creating ZFS Storage Pools.
In the next example, let’s move datapool/fred to a directory just called /fred. ZFS dataset quotas are used to limit the amount of space consumed by a dataset and all of its children. These properties are all described in the zpool man page.
ZFS I/O performance
In this part of the lab we are going to create a mirrored pool and place some data in it. We will then force some data corruption by doing some really dangerous things to the underlying storage. Once we’ve done this, we will watch ZFS correct all of the errors. There are now 2 different 1GB files in /datapool/bob, but df only says 1GB is used. It turns out that mkfile creates a file filled with zeroes.
To prevent a file system from being mounted, set the mountpoint property tonone. In addition, the canmount property can be used to control whether a file system can be mounted. For more information about the canmount property, seeThe canmount Property. For example, if pool/home has the mountpointproperty set to /export/stuff, then pool/home/user inherits /export/stuff/user for its mountpoint property value.
To view contents of zoned dataset you need to start zone or mount it directly. If you are making use of snapshots, You are not able to mount a snapshot created using Purity, due to it having a duplicate GUID. It is recommened that if you need to use snapshots of ZFS volumes, then use ZFS internal snapshot feature.
These pools provide all of the storage allocations that are used by the file systems and volumes that will be allocated from the pool. Let’s begin by creating a simple zpool, called datapool. Now that we can create these point in time snapshots, we can use them to create new datasets.
Set ZFS file system properties
They are datasets, just like any other, but start off with the contents from the snapshot. Even more interesting, these clones only require space for the data that’s different than the snapshot. That means that if 5 clones are created from a single snapshot, only 1 copy of the common data is required. As we saw in the earlier exercise, a default dataset is automatically created when creating a zpool.
Note that not all properties can be changed (ex. version, free, allocated). Without an argument, ZFS will look at all of the disks attached to the system and will provide a list of pool names that it can import. If it finds two pools of the same name, the unique identifier can be used to select which pool you want imported. See that a second vdev (mirror-1) has been added to the pool.
Configuring ZFS SMB Sharing
Expanding a volume is just a matter of setting the dataset property volsize to a new value. Be careful when lowering the value as this will truncate the volume and you could https://topbitcoinnews.org/ lose data. In this next example, let’s grow our volume from 2GB to 4GB. Since there is a UFS file system on it, we’ll use growfs to make the file system use the new space.
When it finds an error, it generates an FMA error report and then tries to correct the error by rewriting the block, and reading it again. If too many errors are occuring, or the rewrite/reread cycle still fail, a hot spare is requested, if available. Notice that the hot spare is automatically resilvered and the pool is returned to the desired availability. ZFS provides the ability to preserve the contents of a dataset through the use of snapshots. All of these properties are preserved across exporting and importing of zpools. When you patch or upgrade Oracle Solaris, a new version of the zpool may be available.
Create a simple pool called datapool with 3 datasets, fred, barney and dino. Notice that not only did it change datapool/fred, but also all of its children. The first thing to notice is that the available space for datapool/fred and all of its children is now 2GB, which was the quota we set with the command above. Also notice that the quota is inherited by all of the children. A dataset can have children, just as a directory can have subdirectories.
All of this is done when the pool is created, making ZFS much easier to use than traditional file systems. What we can see from this output that our new pool called datapool has a single ZFS virtual device called raidz1-0. That vdev is comprised of our four disk files that we created in the previous step. File systems can also be explicitly managed through legacy mount interfaces by usingzfs set to set the mountpoint property to legacy.
If you want to change one, like quota, you have to create a child dataset. We can use zfs list to get basic information about all of our ZFS datasets. And that’s it – nothing more complicated than zpool upgrade. Now you can use features provided in the newer zpool version, like log device removal , snapshot user holds , etc. We will create 4 files and use them for our first pool. When you change the mountpoint property from legacy or none to a specific path, ZFS automatically mounts the file system.
It is simple to upgrade an existing pool, adding the new functionality. In order to do that, let’s create a pool using an older version number , and then upgrade the pool. Notice that you don’t have to grow file systems when the pool capacity increases. File systems can use whatever space is available in the pool, subject to quota limitations, which we will see in a later exercise. Now the vdev name has changed to mirror-0 to indicate that data redundancy is provided by mirroring instead of parity as it was in our first example. Before looking at some other types of vdevs, let’s destroy the datapool, and see what happens.