# BeeGFS Storage Pool Tests

From [BeeGFS Architecture Overview](https://doc.beegfs.io/latest/architecture/overview.html):

> The most intuitive way to present the **storage pools** to a user is by using **a single directory per pool**. This gives the user a straightforward way to assign files to different pools just by placing them into different directories.

Add a **storage target** to create a new **storage pool**:

beegfs-ctl --addstoragepool --desc="<pool description>" --targets=<target id>

Instruct BeeGFS to place everything under a **directory** to a specific **storage pool**:

beegfs-ctl --setpattern --storagepoolid=<pool id> <directory path>

Example:

[root@vm-master ~]# beegfs-df
METADATA SERVERS:
TargetID   Cap. Pool        Total         Free    %      ITotal       IFree    %
========   =========        =====         ====    =      ======       =====    =
       2      normal       3.9GiB       3.6GiB  93%        0.3M        0.2M  75%

STORAGE TARGETS:
TargetID   Cap. Pool        Total         Free    %      ITotal       IFree    %
========   =========        =====         ====    =      ======       =====    =
      31      normal      28.0GiB      27.8GiB  99%       14.7M       14.7M 100%
      32      normal      32.0GiB      31.7GiB  99%       16.8M       16.8M 100%
[root@vm-master ~]# beegfs-ctl --liststoragepools
Pool ID   Pool Description                      Targets                 Buddy Groups
======= ================== ============================ ============================
      1            Default 31,32
[root@vm-master ~]# beegfs-ctl --addstoragepool --desc="Warm pool consisting SSDs" --targets=31
Successfully created storage pool.

ID: 2; Description: Warm pool consisting SSDs
[root@vm-master ~]# beegfs-ctl --addstoragepool --desc="Cool pool consisting HDDs" --targets=32
Successfully created storage pool.

ID: 3; Description: Cool pool consisting HDDs
[root@vm-master ~]# beegfs-ctl --liststoragepools
Pool ID   Pool Description                      Targets                 Buddy Groups
======= ================== ============================ ============================
      1            Default
      2 Warm pool consisting SSDs 31
      3 Cool pool consisting HDDs 32
[root@vm-master ~]# cd /mnt/beegfs
[root@vm-master beegfs]# mkdir warm cool
[root@vm-master beegfs]# beegfs-ctl --setpattern --storagepoolid=2 /mnt/beegfs/warm
New storage pool ID: 2
[root@vm-master beegfs]# beegfs-ctl --setpattern --storagepoolid=3 /mnt/beegfs/cool
New storage pool ID: 3
[root@vm-master beegfs]# ll
total 0
drwxr-xr-x 2 root root 0 Jul 17 03:40 cool
drwxr-xr-x 2 root root 0 Jul 17 03:40 warm
[root@vm-master beegfs]# cd cool
[root@vm-master cool]# dd if=/dev/zero of=./cool.bin bs=1024 count=102400
102400+0 records in
102400+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.600183 s, 175 MB/s
[root@vm-master cool]# ll
total 102400
-rw-r--r-- 1 root root 104857600 Jul 17 03:44 cool.bin
[root@vm-master cool]# beegfs-ctl --getentryinfo cool.bin
Entry type: file
EntryID: 0-60F1E168-2
Metadata node: vm-storage.localdomain [ID: 2]
Stripe pattern details:
+ Type: RAID0
+ Chunksize: 512K
+ Number of storage targets: desired: 4; actual: 1
+ Storage targets:
  + 32 @ vm-storage.localdomain [ID: 3]
[root@vm-master cool]# cd ../warm
[root@vm-master warm]# dd if=/dev/zero of=./warm.bin bs=1024 count=102400
102400+0 records in
102400+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.574062 s, 183 MB/s
[root@vm-master warm]# ll
total 102400
-rw-r--r-- 1 root root 104857600 Jul 17 03:46 warm.bin
[root@vm-master warm]# beegfs-ctl --getentryinfo warm.bin
Entry type: file
EntryID: 0-60F1E1E0-2
Metadata node: vm-storage.localdomain [ID: 2]
Stripe pattern details:
+ Type: RAID0
+ Chunksize: 512K
+ Number of storage targets: desired: 4; actual: 1
+ Storage targets:
  + 31 @ vm-storage.localdomain [ID: 3]