Romex Software Forum

I don't know internal logic of Primocache, but it is completely feasible that it fills up L2 sequentially, and new data is initially always added to end. This way it'll easily fill up 100%. But, nonetheless, you need to expect for L2 to fill up all space, or underlying device for L2 to be 'full'. Ju...

Ah, you are correct. It is possible to only use one device for caching one volume.

In case of using SS be aware of thin provisioning. When you create volume, leave some free space in pool.
What seems to happen is SS pool runs out of space.

For one, why setup array in storage spaces, and use that for cache? You should use disks themselves, without SS for caching. 2nd - you are confusing some things. Freeing cache on written is freeing cache within L2 cache in Primocache. This will *NOT* free up space in underlying caching device! Espec...

When PrimoCache populates data into L2, if data is cached in L1, PrimoCache will copy data from L1 to L2, otherwise PrimoCache will read data from the source disk. Please note that in order not to affect other applications' tasks, PrimoCache is set by default to fill L2 data when the source disk is...

Solution is somewhat simple.
When reading queue for what needs to be written in L2 grows.
If queue > L2 size, just trim whatever oldest is meant to be written in from queue.

Use Linux. Many options there.

Firstly - PrimoCache is a bit silly with filling L2 cache, as L2 (read) cache is filled by reading from disks, and not by using data in L1 cache. Write cache (if using) is different matter. As for using 80% - some suggest is as PrimoCache does not support TRIM. So leaving extra free space may help w...

... or simply look how ZFS does it, as it combines both MRU (Most Recently Used) and MFU (Most Frequently Used).

Two more things, before declaring issue with CIFS/SMB servers:
1) Did you try iperf between two PC's (client/server)?
2) Maybe try different PCIe slot for 10G card? Might be in x1 PCIe, even if slot is x16. Also, it might be over chipset.

PrimoCache moves data by default when there is no disk activity, so this is I/O you saw initially from HDD&SSD at same time. Now, you need to dig deeper - when copying again, and data is read from SSD cache, is disk at 100% utilization? Is disk at 100% utilization on destination computer? Are an...