Search found 46 matches

by Nick7
Tue Nov 21, 2023 2:58 pm
Forum: Technical Support
Topic: NVMe characteristics important to PrimoCache?
Replies: 3
Views: 1338

Re: NVMe characteristics important to PrimoCache?

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...
by Nick7
Fri May 12, 2023 2:51 pm
Forum: Technical Support
Topic: caching behavior with windows built-in cache; and other generic questions
Replies: 19
Views: 1584

Re: caching behavior with windows built-in cache; and other generic questions

... or simply look how ZFS does it, as it combines both MRU (Most Recently Used) and MFU (Most Frequently Used).
by Nick7
Wed May 10, 2023 7:08 am
Forum: Technical Support
Topic: Primocache and Network File Transfers
Replies: 17
Views: 1490

Re: Primocache and Network File Transfers

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.
by Nick7
Tue May 09, 2023 12:16 pm
Forum: Technical Support
Topic: Primocache and Network File Transfers
Replies: 17
Views: 1490

Re: Primocache and Network File Transfers

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...
by Nick7
Thu May 04, 2023 8:24 am
Forum: Technical Support
Topic: Primocache and Network File Transfers
Replies: 17
Views: 1490

Re: Primocache and Network File Transfers

Test: I copy a large 15 GB file down from server to client, I get approx. 150 MBps Hoping that this will put it in the SSD cache. Then I delete the file from the client. Thereafter, I copy the same file down from server to client again. The resulting down speed is the same as the first attempt - 16...
by Nick7
Wed May 03, 2023 10:39 am
Forum: Technical Support
Topic: primo cache writing more data at once than the L2 cache size is
Replies: 4
Views: 315

Re: primo cache writing more data at once than the L2 cache size is

'Simple' solution: Verify amount of data to be fetched into L2 is not bigger than L2 size. If it is, discard oldest data to be read, and append new data to be read at end of queue.
Even verifying this (size of queue to be read) every few seconds is good enough.
by Nick7
Tue May 02, 2023 9:47 am
Forum: Technical Support
Topic: primo cache writing more data at once than the L2 cache size is
Replies: 4
Views: 315

Re: primo cache writing more data at once than the L2 cache size is

PrimoCache will read everything it was read, and write (and re-write) data in L2 cache.
It's far from ideal... maybe one day it will be fixed.
by Nick7
Sun Apr 02, 2023 5:42 pm
Forum: Technical Support
Topic: Cache Hit Rate 0%
Replies: 5
Views: 488

Re: Cache Hit Rate 0%

PrimoCache does not write to Level-2 cache immediately. It does it when drives are idle. What happens in your case - you read 80G file (cache still empty), you write new file (cache still empty), etc... When there is no I/O activity, PrimoCache starts filling cache.. possibly even with data that doe...
by Nick7
Sat Apr 01, 2023 9:26 am
Forum: Submit Suggestions
Topic: GpuRamDrive: GPU VRAM as RAMdisk: Game changer!?
Replies: 32
Views: 35919

Re: GpuRamDrive: GPU VRAM as RAMdisk: Game changer!?

No matter what they allow, standard RAM is faster, cheaper.
With PCIe 5.0 x16 you can have theoretical 64GB/s.
But compared to standard RAM, it would still have much higher latency due to PCIe BUS.

Please do not waste time where it's not needed....
by Nick7
Sun Mar 12, 2023 4:19 pm
Forum: Technical Support
Topic: How to set custom, very large block size?
Replies: 7
Views: 570

Re: How to set custom, very large block size?

For PrimoCache to work, you need to pre-cache file. For that, it doesn't matter if block size is 10MB or 4k.

You need to setup some batch file to read&copy file you want to play to some local SSD drive, and play from there. PrimoCache is not answer for your use case.