slow blob storage

Question

Hello good afternoon!

My BlockBlobStorage of the premium storage account with private link is very slow, the storage container is mounted on the linux VM with blobfuse2, and the reading/writing process is very slow. Can you help me with this?

region: South Africa North

Answer 1

Hello good day!

I attach a simplified diagram where I use VMSS in my Web layer, a Mysql PaaS and a blob with a private link, with a mount point configured with blobfuse2.

-If you have configured local file-caching for Blobfuse and if so, are you caching small or large files?

• Yes, I initially configured the ephemeral disk cache in path: /mnt/resource/blobfuse2tmp, and configured it for smaller files as shown in my conf.yaml below: -`file_cache:
  path: /mnt/resource/blobfuse2tmp
  timeout-sec: 120
  max-size-mb: 4096
  no-symlinks: true

-Have you tried using an SSD for caching for high performance?

• SSD ephemeral disks

I performed a "time cp -Rpv" test between the VMSS and the Blob of an ~80Mb directory with several small files, and I got a time of approximately:

real 0m38.500s

With this result my application is extremely slow:

I will activate Blobfuse2 Health Monitor as you suggested.

Answer 2

I got good performance with the following scenario:

1- I created a Proximity Placement Groups

2- Added VMSS in PPG

3- I created a new VM in place of the storage, configured it as an NFS server with a Premium SSD disk, presented an NFS mount point to the VMSS and added it to the PPG

4- Enabled accelerated networking on VMSS and VM Storage

I did a new test "time cp -Rpv", and got very good results as below:

real 0m8.500s
user 0m0.284s
sys 0m2.065s

But I would like to use blob storage instead of VM, it seems to me that there is no way to insert storage in PPG

With this test it seems to me a latency problem with the storage, is there a way to improve this?