Search found 550 matches

by Jaga
Sun Sep 27, 2020 9:31 am
Forum: Technical Support
Topic: [Request] Flush only oldest blocks on cache resize
Replies: 0
Views: 16

[Request] Flush only oldest blocks on cache resize

It would be a really nice change to Primocache if upon resizing the cache, that it not completely dump it's contents (i.e. reset). Instead, how about dumping the least used blocks that can no longer fit, and allow the rest to stay in the newly sized cache. It would save quite a bit of effort in re-p...
by Jaga
Sat Sep 26, 2020 3:02 pm
Forum: Technical Support
Topic: Decreased speed with PrimoCache task
Replies: 14
Views: 217

Re: Decreased speed with PrimoCache task

I'd recommend disabling Windows prefetch, but if you use Windows Search then leave indexing on.
by Jaga
Sat Sep 26, 2020 4:51 am
Forum: Technical Support
Topic: Decreased speed with PrimoCache task
Replies: 14
Views: 217

Re: Decreased speed with PrimoCache task

You can email Support and as for a renewal on the trial once you get all the new hardware in place later on, they're usually pretty forgiving on that and willing to help. As for your last question, "Prefetch last cache" looks up blocks to populate the L1 cache at boot from a block index Primocache k...
by Jaga
Sat Sep 26, 2020 4:47 am
Forum: Technical Support
Topic: Windows Write-caching Policy
Replies: 2
Views: 58

Re: Windows Write-caching Policy

My personal opinion is that it has no bearing on Primocache's effectiveness. I leave "Enable write caching on the device" turned on, and have never had any issues. I do not however turn off "Windows write-cache buffer flushing". Both are at Windows default settings.
by Jaga
Wed Sep 23, 2020 2:52 am
Forum: Technical Support
Topic: Decreased speed with PrimoCache task
Replies: 14
Views: 217

Re: Decreased speed with PrimoCache task

Your software solution overhead CPU, and it sound almost the same as Windows pool management. Not really. Windows storage spaces sucks compared to Drivepool. Tested them both in a production environment, won't ever go back to storage spaces. :) You must have misunderstand me as I won't put any SSD ...
by Jaga
Wed Sep 23, 2020 2:35 am
Forum: Technical Support
Topic: Data loss with defer write
Replies: 6
Views: 99

Re: Data loss with defer write

I'm just not sure what journaling would do to the performance on Primocache. And I don't think Windows itself has a very robust system in place, since I've run into loss of data countless times on ungraceful shutdowns with Windows on pretty much every desktop version over the years. Primocache uses ...
by Jaga
Tue Sep 22, 2020 4:26 pm
Forum: Technical Support
Topic: Data loss with defer write
Replies: 6
Views: 99

Re: Data loss with defer write

If you hit the power button when Windows is writing to disk actively (no disk caching software) you risk corrupting that data or losing the write entirely. Doesn't matter if you have caching on or off, or are even using it. Even Windows has a warning on drive policies in the management area (Enable ...
by Jaga
Mon Sep 21, 2020 11:41 pm
Forum: Technical Support
Topic: Decreased speed with PrimoCache task
Replies: 14
Views: 217

Re: Decreased speed with PrimoCache task

I have 64GB of RAM installed here, and it works beautifully with high-use apps and Primocache (a 34GB L1 does nicely on the system/app drive). So yes, I'd recommend that configuration if you can afford it and want your hit rate with Primocache to increase. Sounds like the larger SSD would be a good ...
by Jaga
Sun Sep 20, 2020 4:57 pm
Forum: Technical Support
Topic: Decreased speed with PrimoCache task
Replies: 14
Views: 217

Re: Decreased speed with PrimoCache task

If it will not show any performance gains in benchmarks, why it decreased in benchmarks then? Overhead. Imo it's decreased too but need more time to check it. Using a properly configured L2 on a decent SSD will always give better performance than a spinner drive. No testing necessary. I'd suggest e...
by Jaga
Sat Sep 05, 2020 6:14 pm
Forum: Technical Support
Topic: Raid-0 with 4 drives for L2 Cache
Replies: 11
Views: 599

Re: Raid-0 with 4 drives for L2 Cache

My past experience with RAID (mostly with spinners in the past) has held that RAID 1 benefits from multiple read requests at the same time, when compared to RAID 0 (which has better single-request performance). It's going to depend for you on your delivery app (that requests data from the drive and ...