Romex Software Forum

Any word on the next version? It's almost a month overdue now. Even if it's held up due to problems, letting us know how it's going would help a lot.

Other improvements for PrimoCache haven't been integrated into this version 0.9.2. They will come out with next version which is planned on Nov. 29th. Any news on this? It's been almost a week since the planned release date. I'm actually holding on some tests I want to do, waiting for the planned f...

When PrimoCache clears a section of L2 cache (due to file deletion, for example), does it issue a TRIM command to erase the cleared blocks? This could potentially improve L2 cache performance, as it could prevent the cache having to wait for an erase cycle on the SSD it's trying to write to.

Does changing block size have any effect (and are you using the default 4KB size)? Good point. The block size will affect how much memory overhead there is, which is in addition to the set cache size. (I believe it's also proportional to both the cache size and the size of the disks being cached, s...

The write speed gets reduced to about 50-60 percent if the urgent writes start (copy from disk without cache to other disk with write cache and this time without any encryption). So that is a very big performance hit and resource usage if you have write intensive tasks. Sounds to me like you may ha...

In order to implement a "hybrid drive" style solution, as I believe is the intent with L2 cache, the cache should be able to differentiate between large sequential and small random reads. In order to be effective, the cache should restrict itself to small random reads (at least in the L2) ...

I would also suggest that the cache leave some buffer for lazy-writing to the USB device, as they typically have much lower write speeds than read, especially with random writes. Grouping small 4k writes into larger (>512k) writes to the USB would be even more helpful.

8GB could be enough depending on your usage. I use about 8GB of level 2 cache for my games, and it keeps a consistent >90% hit rate. However, I haven't had good luck at all with USB, even USB3. Most USB flash drives have much slower write speeds, and their random 4K write can be truly awful (I'm luc...

Unfortunately, my findings weren't very good. Initial load into a USB drive is painfully slow as it holds up the entire cache while it writes to the drive. Once committed to the L2, things got better, but read speeds on USB just aren't sufficient to make the cache work well. I used Planetside 2 as a...

Of course, SSD or hidden memory are obvious choices for L2 cache, however I was wondering about the viability of USB flash drives. They often have good random read speeds, but their random write tends to be much slower. Does PrimoCache maintain a buffer for transfer to L2 cache to accommodate slower...