Preparing SSDs

This section describes how to format NVMe SSDs and mount them to storage directories on storage nodes.

Check drives that can be mounted.

lsblk

Command output:

# NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
# ... 
# nvme0n1                   259:0    0  2.9T  0 disk 
# nvme1n1                   259:1    0  2.9T  0 disk  
# nvme2n1                   259:2    0  2.9T  0 disk 
# nvme3n1                   259:3    0  2.9T  0 disk  
# nvme4n1                   259:4    0  2.9T  0 disk 
# nvme5n1                   259:5    0  2.9T  0 disk 
# nvme6n1                   259:6    0  2.9T  0 disk 
# nvme7n1                   259:7    0  2.9T  0 disk  
# ...

Create directories.

mkdir -p /storage/data{0..7} 
mkdir -p /var/log/3fs

Format the drives and mount them.

for i in {0..7};do mkfs.xfs -L data${i} /dev/nvme${i}n1;mount -o noatime,nodiratime -L data${i} /storage/data${i};done 
mkdir -p /storage/data{0..7}/3fs

The eight NVMe drives in this document are numbered from 0 to 7. You can adjust the numbering as required.

Check the formatting and mounting results.

lsblk

Command output:

# NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS 
# ... 
# nvme0n1                   259:0    0  2.9T  0 disk /storage/data0 
# nvme1n1                   259:1    0  2.9T  0 disk /storage/data1 
# nvme2n1                   259:2    0  2.9T  0 disk /storage/data2 
# nvme3n1                   259:3    0  2.9T  0 disk /storage/data3 
# nvme4n1                   259:4    0  2.9T  0 disk /storage/data4 
# nvme5n1                   259:5    0  2.9T  0 disk /storage/data5 
# nvme6n1                   259:6    0  2.9T  0 disk /storage/data6 
# nvme7n1                   259:7    0  2.9T  0 disk /storage/data7 
# ...

Increase the maximum number of asynchronous I/O (AIO) requests.
```
sysctl -w fs.aio-max-nr=67108864
```

Parent topic: Deploying the Storage Service