They also allow the administrator to apply different snapshot policies, set maximum space that each filesystem can use (quotas), optimize properties for different uses (e.g. For example you could create a dataset to store images and disable compression on it and create another dataset to store text files and enable compression on that one. zfs create -p fourth/a/b/c/d/e.īut how are multiple ZFS filesystems useful? Besides logically separating data, they offer a way to set different properties on different datasets. We can automatically create multiple non-existing parents by adding the '-p' switch, e.g. Children filesystems can be added to the parent filesystems with commands like zfs create fourth/images/store1. These look and act in a similar fashion to regular directories. Let's create another ZFS filesystem: zfs create fourth/imagesĪs you can see, the syntax is simple: zfs create name_of_pool/name_of_dataset. Different mount points can also be chosen when the pool is created, by passing option arguments such as in this example: zpool create -m /other_mountpoint -f fourth vdb vdc. When we have created the previous pool, named 'fourth', ZFS already created a dataset for us, as we can see with: zfs listīy default, the filesystem will be mounted in /name_of_pool, although this can be changed later on (example: zfs set mountpoint=/fourth fourth). While we have used the zpool command to interact with pools, for datasets the command is zfs. Of course, a pool is just a building block that wouldn't have much use without datasets such as ZFS filesystems, volumes, snapshots or clones. In the previous tutorial, Use Your Storage Space More Effectively with ZFS - Exploring vdevs, we have explored various types of vdevs that make a ZFS storage pool.

Tech Share is Alibaba Cloud's incentive program to encourage the sharing of technical knowledge and best practices within the cloud community. By Alexandru Andrei, Alibaba Cloud Tech Share Author.

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