Search found 21 matches

by steveb
Wed Sep 29, 2021 9:13 am
Forum: Submit Suggestions
Topic: Dynamic L1 Write Cache
Replies: 2
Views: 2051

Re: Dynamic L1 Write Cache

From my understanding L1 read cache is different to how Windows manages its read cache. My limited understanding is that Windows will cache the full file and is not at the block level. Then depending on your use case you might get better hit ratio with PrimoCache using the memory instead.
by steveb
Sun Sep 26, 2021 6:09 pm
Forum: Submit Suggestions
Topic: Linus Tech Tips video mentions PrimoCache
Replies: 1
Views: 2042

Linus Tech Tips video mentions PrimoCache

https://youtu.be/AhvDJaFdmw8?t=1139

It might be worth providing an official recommendation when to use SSD as L2 when direct storage is also a lower tier SSD.
by steveb
Wed Sep 22, 2021 7:41 am
Forum: Bug Report and Suggestion
Topic: UEFI Ram Disk or OS boot loader driver
Replies: 3
Views: 2411

Re: UEFI Ram Disk or OS boot loader driver

Support wrote: Wed Sep 22, 2021 5:57 am Thank you for your suggestion. We do have a project on working this.
Great to hear, do you have any ETA on a beta build?
by steveb
Tue Sep 21, 2021 3:28 pm
Forum: Submit Suggestions
Topic: Improved Cache Algorithm
Replies: 5
Views: 2440

Re: Improved Cache Algorithm

PrimoCache currently uses an LRU (Least Recently Used) algorithm to determine which blocks to discard when full. Older versions (2.x if I recall correctly) gave the choice between LRU and LFU (Least Frequently Used) algorithms. It would be interesting to hear from support why LFU was removed, as th...
by steveb
Tue Sep 21, 2021 3:26 pm
Forum: Technical Support
Topic: Full Boot Drive into RAM?
Replies: 6
Views: 576

Re: Full Boot Drive into RAM?

If i had say 200GB boot drive with 200GB L1 Cache (prefetch enabled) and read all the data. Should i expect to keep having 100% hit rate? Not tested. But theoretically, it will not be 100% but will increase and close to 100%. During the boot phase, some data has to be read from disks because at tha...
by steveb
Tue Sep 21, 2021 3:24 pm
Forum: Bug Report and Suggestion
Topic: UEFI Ram Disk or OS boot loader driver
Replies: 3
Views: 2411

UEFI Ram Disk or OS boot loader driver

Would it be possible for you to add support for installing an OS into a ram disk? I was thinking a UEFI ram disk or OS boot manager ramdisk driver. This would have a decent increase in performance than using primocache 100% l1 cache.
by steveb
Tue Sep 21, 2021 3:19 pm
Forum: Submit Suggestions
Topic: L2 Striped Reading
Replies: 8
Views: 1633

Re: L2 Striped Reading

As it is not increasing the latency until the L2 drive is maxed out, at which point it would be better to use the other drive. Software scheduling/processing also introduces additional latency. The implementation is not simple and ideal. Usually hardware solutions would be faster than software soul...
by steveb
Tue Sep 21, 2021 2:29 am
Forum: Submit Suggestions
Topic: L2 Striped Reading
Replies: 8
Views: 1633

Re: L2 Striped Reading

The feature would not be complex as its just off loading read operations to the lower tier when the active time on l2 is 100%...similar drives have been tested before with Intel VROC raid 0, etc. Sadly they increase the latency by a decent amount. If Intel's VROC increases latency (with hardware su...
by steveb
Mon Sep 20, 2021 3:09 pm
Forum: Submit Suggestions
Topic: Improved Cache Algorithm
Replies: 5
Views: 2440

Re: Improved Cache Algorithm

PrimoCache currently uses an LRU (Least Recently Used) algorithm to determine which blocks to discard when full. Older versions (2.x if I recall correctly) gave the choice between LRU and LFU (Least Frequently Used) algorithms. It would be interesting to hear from support why LFU was removed, as th...
by steveb
Mon Sep 20, 2021 2:56 pm
Forum: Submit Suggestions
Topic: L2 Striped Reading
Replies: 8
Views: 1633

Re: L2 Striped Reading

...raiding the 2 drives would results in lower performance... What type of RAID did you use for your testing? Windows software, motherboard or dedicated RAID controller card? Implementing this feature request would not only seem complex (each drive would need to be benchmarked to determine best spe...