Search found 9 matches

by ml70
Tue Jan 21, 2020 12:52 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

First I need to apologize here, because it turned out that the crippling write spikes shown in the picture are not the Cause, but the Effect of something totally else. A rare configuration issue in an upstream router sometimes randomly starved the writer of data, and due to that idleness the cache p...
by ml70
Tue Jan 14, 2020 6:27 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

Writing is very bursty, anything upto 1 gb at a time, but also sustained for long periods of time, in windows task manager terms cpu load 30-80% and same for disk usage at least 6 days a week. I'm afraid i don't know how to obtain the number of write reqs per second, it varies very much anyway so co...
by ml70
Fri Jan 10, 2020 2:40 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

Don't you think it should be using the Defered Write timeout instead? It's a bit of a discrepancy when user intends no writes to hdd for 10801 seconds, but some secret rule overrides it to 120. I'd have nothing against a default of 120 seconds if it was included in the UI and easily permanently over...
by ml70
Wed Jan 08, 2020 3:17 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

Of course I need to verify that i'm talking about the right thing, but when following the Disk tab on Process Hacker 2, these spikes seem to coincide with amount of Defered Blocks getting less, and writes happening to the HDD (following with Task Manager). And the spikes are sometimes huge, closer t...
by ml70
Wed Jan 08, 2020 2:59 am
Forum: Latest News
Topic: [2019-12-31] PrimoCache 3.2.0 and 4.0.0 alpha released!
Replies: 31
Views: 16180

Re: [2019-12-31] PrimoCache 3.2.0 and 4.0.0 alpha released!

2) Consider the L2 SSD writing lifespan, generally we shall reduce the writing on L2. It's kind of waste to transfer all L1 write-data to L2. There are use cases where this would actually be absolutely preferable, if doing heavy caching the cache ssd is an expendable component with a finite lifespa...
by ml70
Wed Jan 08, 2020 2:49 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

Thank you, it'll take a while to rebuild the cache to the point where L2 is full, will follow up on what happens with v3.2.0 at that point. What the UI refers to as "blocks" above, is this some fixed size block or the size configured as block size? So 256 kb, in this case. Trying to understand how m...
by ml70
Fri Jan 03, 2020 2:34 pm
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Re: Power lost, L2 contents lost

Here's the pic and the L2 gather interval is 15 seconds. In general everything is well as long as there is empty space on L2 cache disk. But after it reaches 32 MB funny things start to happen sooner or later. The large empty L2 space right now is because I pre-emptively emptied the cache on reboot,...
by ml70
Sat Dec 28, 2019 8:38 am
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Huge read/write spikes sometimes

What could be the cause of this, huge read/write spikes appearing rarely, less than once a day, during which everything else halts down. Process doing this is System(4). Screenshot from Process Hacker 2. This lasts for 5-6 minutes during which the system is completely unusable. No data goes in/out o...
by ml70
Mon Dec 16, 2019 4:08 pm
Forum: Technical Support
Topic: Power lost, L2 contents lost
Replies: 15
Views: 10792

Power lost, L2 contents lost

Is this how it's supposed to be, or is there something wrong with my setup. Trialing PrimoCache 3.0.9. RAM Read cache on, Write cache off. L2 Read and Write cache on SSD drive, Deferred write on (Intelligent), period Infinite. I mucked up something (unrelated to PrimoCache) and had to force power of...