Convert Cache Pool Back to Single Cache?

[mbc0]

I tried running 2XNVME 1TB Drives as a dual cache pool but suffered terrible performance (yes, tried beta and reformatted to new partition size) 

 

I would like to go back to a single cache drive to regain the performance but googling/faq does not cover this process only how to remove drives from a pool.  

 

I am currently left with 1 drive in the cache pool and still suffering poor performance.

 

 

[trurl]

What you have is already a single drive btrfs cache pool. You could reformat it as XFS but might not improve performance. How are you measuring that anyway?

[mbc0]

15 minutes ago, trurl said:

What you have is already a single drive btrfs cache pool. You could reformat it as XFS but might not improve performance. How are you measuring that anyway?

Before I had a single cache drive and could copy from my Windows Desktop machine at 1000mb/s over my fibre connection, I wanted redundancy so created a cache pool to get only 230mb/s @johnnie.black suggested trying the beta which I installed, freshly formatted both NVME drives (which each are capable and tested at 3000mb/s and sustained a 1000mb/s speed when used as a single cache or unassigned device from my Windows Desktop) and still only get 230mb/s so to regain my speed I wanted to revert back to a single cache drive.

[trurl]

16 minutes ago, mbc0 said:

I wanted to revert back to a single cache drive

You have a single cache drive as shown in the Balance Status section in that screenshot.

18 minutes ago, mbc0 said:

suggested trying the beta

Seem to remember seeing some thread like that, do you have a link?

[mbc0]

2 hours ago, trurl said:

Seem to remember seeing some thread like that, do you have a link?

Hi, yes it is here

 

 

[mbc0]

2 hours ago, trurl said:

You have a single cache drive as shown in the Balance Status section in that screenshot.

I do but it is showing as a pool still instead of a cache drive (2nd screenshot is from my other server)

 

[trurl]

17 minutes ago, mbc0 said:

(2nd screenshot is from my other server)

What is the filesystem of cache on that other server?

[trurl]

Also, have you tried reducing the number of disks allowed in the pool to only one? (stop the array to see what I mean)

[mbc0]

2 minutes ago, trurl said:

What is the filesystem of cache on that other server?

BTRFS

 

1 minute ago, trurl said:

Also, have you tried reducing the number of disks allowed in the pool to only one? (stop the array to see what I mean)

Yes, I have reduced the slots to 1 

 

 

[mbc0]

problem server

 

 

Other Server

[trurl]

If you were trying to demonstrate how many slots you allow for cache that screenshot doesn't do it. 

[JorgeB]

Showing "Pool" for single device cache is normal with the new beta.

[mbc0]

22 minutes ago, johnnie.black said:

Showing "Pool" for single device cache is normal with the new beta.

Thanks for that!

 

 

[mbc0]

9 hours ago, trurl said:

If you were trying to demonstrate how many slots you allow for cache that screenshot doesn't do it. 

now not necassary as per Johnnie's last post, it appears that is normal for the new beta.