How do I list ZFS snapshots?

To list the snapshots created for a specific file system, enter zfs list -r -t snapshot followed by the file system name. In the example above, the snapshots created for the file system rpool/export/home are listed. This information is displayed by using the name and creation properties.

How do I check my ZFS snapshot status?

Snapshots of file systems are accessible in the . zfs/snapshot directory within the root of the file system. For example, if tank/home/ahrens is mounted on /home/ahrens , then the tank/home/ahrens@thursday snapshot data is accessible in the /home/ahrens/. zfs/snapshot/thursday directory.

How much space does a ZFS snapshot take?

The actual meta-data of snapshots are negligible. As a copy-on-write file system, ZFS snapshots only require space for modified data; creating a snapshot does not immediately duplicate everything. If you have a snapshot of given size, and then add or modify files summing up to 100GB, the snapshot will “cost” you 100GB.

How do I set quota in ZFS?

You can use the quota property to set a limit on the amount of disk space a file system can use. In addition, you can use the reservation property to guarantee that a specified amount of disk space is available to a file system.

What are ZFS snapshots?

A snapshot is a read-only copy of a file system or volume. Snapshots consume disk space directly from the same storage pool as the file system or volume from which they were created. Recursive snapshots are created quickly as one atomic operation.

What is a snapshot in ZFS?

A snapshot is a read-only copy of a file system or volume. Snapshots use no separate backing store. Snapshots consume disk space directly from the same storage pool as the file system or volume from which they were created.

How does ZFS snapshot work?

A snapshot is a read-only copy of a file system or volume. Snapshots can be created almost instantly, and they initially consume no additional disk space within the pool.

How do I increase the volume of my ZFS?

How to grow a ZFS volume

1. Display file system mount status.
2. Display current ZFS volume size and reservation properties.
3. Change the volsize ZFS property for fort/vol1 to 2Gig.
4. Confirm the changes were made by displaying the volsize and reservation ZFS properties.
5. Run growfs to expand mounted file system.

How do I increase ZFS file system?

You can add the 5 Gb space in your current size (12Gb). In above command you can reserve the 17G space to root filesystem. You can check the new filesystem space using “zfs get quota” command.

How is a snapshot of a ZFS file created?

A zfs snapshot is a read-only copy of a Solaris ZFS file system or volume. Snapshots can be created almost instantly and initially consume no additional disk space within the pool.

Which is the most powerful feature of ZFS?

Snapshot, clone. and replication are the most powerful features of the ZFS filesystem. Snapshot is one of the most powerfull features of ZFS, a snapshot provides a read-only, point-in-time copy of a file system or volume that does not consume extra space in the ZFS pool. The snapshot uses only space when the block references are changed.

How does the user reference count change in ZFS?

Each snapshot has an associated user-reference count, which is initialized to zero. This count increases by 1 whenever a hold is put on a snapshot and decreases by 1 whenever a hold is released.

How does ZFS replication work and why is it important?

The basis for this ZFS replication is a snapshot, we can create a snapshot at any time, and we can create as many snapshots as we like. By continually creating, transferring, and restoring snapshots, you can provide synchronization between one or more machines.