Run first IOs with WekaFS

A filesystem must reside in a filesystem group, so first, create a filesystem group:

# to create a new filesystem group
$ weka fs group create my_fs_group
FSGroupId: 0

# to view existing filesystem groups details in the Weka system
$weka fs group
FileSystem Group ID | Name        | target-ssd-retention | start-demote
--------------------+-------------+----------------------+-------------
FSGroupId: 0        | my_fs_group | 1d 0:00:00h          | 0:15:00h

Then, you can create a filesystem within that group:

# to create a new filesystem
$ weka fs create new_fs my_fs_group 1TiB
FSId: 0

# to view existing filesystems details in the Weka system
$ weka fsFilesystem ID | Filesystem Name | Group       | Used SSD (Data) | Used 
--------------+-----------------+-------------+---------------------------------
0             | new_fs          | my_fs_group | 0 B             | 4.09


SSD (Meta) | Used SSD | Free SSD | Available SSD (Meta) | Available SSD
+-----------------+----------+----------+------------------------------
KB         | 4.09 KB  | 1.09 TB  | 274.87 GB            | 1.09 TB     


 | Used Total (Data) | Used Total | Free Total | Available Total |  
+---------------+-------------------+------------+-----------------
 | 0 B               | 4.09 KB    | 1.09 TB    | 1.09 TB         | 


Max Files | Status | Encrypted | Object Storages | Auth Required
+-----------------+-----------+--------+-----------+------------
22107463  | READY  | False     |                 | False

For creating an additional filesystem, it is first needed to decrease the default filesystem SSD size:

# to reduce the size of the default filesystem
$ weka fs update default --total-capacity 1GiB

# to create a new filesystem in the default group
$ weka fs create new_fs default 1GiB

# to view existing filesystems details in the Weka system
$ weka fs
Filesystem ID | Filesystem Name | Group   | Used SSD (Data) | Used SSD 
--------------+-----------------+---------+---------------------------
0             | default         | default | 0 B             | 4.09 KB 
1             | new_fs          | default | 0 B             | 4.09 KB    


(Meta) | Used SSD | Free SSD | Available SSD (Meta) | Available SSD | +-----------------+----------+----------+------------------------------
       | 4.09 KB  | 1.07 GB  | 268.43 MB            | 1.07 GB       |  
       | 4.09 KB  | 1.09 TB  | 274.87 GB            | 1.09 TB       |    


Used Total (Data) | Used Total | Free Total | Available Total | Max +-----------------+-----------+--------+-----------+-----------------
0 B               | 4.09 KB    | 1.07 GB    | 1.07 GB         | 21589    0 B               | 4.09 KB    | 1.09 TB    | 1.09 TB         | 22107463  


 Files | Status | Encrypted | Object Storages | Auth Required
+-------------------------------------------------------------
       | READY  | False     |                 | False
       | READY  | False     |                 | False

For more information about filesystems and filesystem groups, refer to Managing Filesystems, Object Stores & Filesystem Groups.

You can mount a filesystem by creating a mount point and calling the mount command:

$ sudo mkdir -p /mnt/weka
$ sudo mount -t wekafs new_fs /mnt/weka

To check the filesystem is mounted:

# using the mount command
$ mount | grep new_fs
new_fs on /mnt/weka type wekafs (rw,relatime,writecache,inode_bits=64,dentry_max_age_positive=1000,dentry_max_age_negative=0)

For more information about mounting filesystems and mount options, refer to Mounting Filesystems.

Now everything is set up, and you can write some data to the filesystem:

# to perform random writes
$ sudo dd if=/dev/urandom of=/mnt/weka/my_first_data bs=4096 count=10000
10000+0 records in
10000+0 records out
40960000 bytes (41 MB) copied, 4.02885 s, 10.2 MB/s

# to see the new file creted
$ ll /mnt/weka
total 40000
-rw-r--r-- 1 root root 40960000 Oct 30 11:58 my_first_data

# to check the WekaFS filesystems via the CLI shows the used SSD capacity:
$ weka fs
Filesystem ID | Filesystem Name | Group   | Used SSD (Data) | Used SSD (Meta) | Used SSD | Free SSD | Available SSD (Meta) | Available SSD | Used Total (Data) | Used Total | Free Total | Available Total | Max Files | Status | Encrypted | Object Storages | Auth Required
--------------+-----------------+---------+-----------------+-----------------+----------+----------+----------------------+---------------+-------------------+------------+------------+-----------------+-----------+--------+-----------+-----------------+--------------
0             | default         | default | 40.95 MB        | 180.22 KB       | 41.14 MB | 1.03 GB  | 268.43 MB            | 1.07 GB       | 40.95 MB          | 41.14 MB   | 1.03 GB    | 1.07 GB         | 21589     | READY  | False     |                 | False

This has completed the check that the Content Software for File cluster is configured and IOs can be performed to it.

To make sure that the Content Software for File cluster and the IT environment are well configured, more complex IO patterns and benchmark tests should be conducted using the FIO utility.

Although results can vary using different hosts and networking, it is not expected to be very different than what we and many other customers achieved. A properly configured Weka cluster and IT environment should yield similar results as described in Testing Content Software for File Performance.