Search found 692 matches

by Jaga
Mon Aug 20, 2018 9:46 pm
Forum: Technical Support
Topic: Block size vs sector size
Replies: 5
Views: 6704

Re: Block size vs sector size

If your DB file has smaller record/field accesses, then yes - a smaller sector and block size would be better for performance (but higher on overhead in Primocache). Normally software pre-allocates new large files when creating them - it all depends on the software though. In the case of pre-allocat...
by Jaga
Mon Aug 20, 2018 8:13 am
Forum: Technical Support
Topic: How much L2 cache? Backups?
Replies: 14
Views: 10971

Re: How much L2 cache? Backups?

Yep, speeds get pretty darn good. And yes - that's why I don't rely on just file duplication across the drives. I still have the SnapRAID parity I made the night before so I can restore a file if needed. It's not a true backup, but it's lightweight and easy on space. True backups are still a good id...
by Jaga
Mon Aug 20, 2018 7:21 am
Forum: Technical Support
Topic: How much L2 cache? Backups?
Replies: 14
Views: 10971

Re: How much L2 cache? Backups?

Now go and turn on 2x folder duplication for one of the folders you are testing with your copy, wait for the duplication to finish, then re-start the copy from that folder. Speeds should go up even higher due to multitasking the drives. I have 4x duplication set on my most important stuff, to guard ...
by Jaga
Mon Aug 20, 2018 7:16 am
Forum: Technical Support
Topic: Block size vs sector size
Replies: 5
Views: 6704

Re: Block size vs sector size

Drives (especially spinners) typically read/write that data faster with smaller sectors. But when you have a lot to read (possibly even fragmented on the drive due to smaller chunks) the larger sectors are better, though sometimes more space inefficient. When Primocache is told to "go fetch thi...
by Jaga
Mon Aug 20, 2018 5:59 am
Forum: Technical Support
Topic: Block size vs sector size
Replies: 5
Views: 6704

Re: Block size vs sector size

The block size you give Primocache to use needs to be a multiple of the sector size on the disk. For optimal performance, setting it equal to sector size is best, but it has the highest overhead in terms of memory use. When caching the boot drive with Primocache, I typically use a 4k sector size and...
by Jaga
Mon Aug 20, 2018 3:33 am
Forum: Technical Support
Topic: Does it cache windows pagefile?
Replies: 2
Views: 2725

Re: Does it cache windows pagefile?

From Support elsewhere on the forums : Yes, since version 2.5.0, paging files also get cached. Since you've added more memory to your system than Windows can see, it's probably time to upgrade the operating system. Better security, better compatibility with newer software, and more memory to give bo...
by Jaga
Sun Aug 19, 2018 12:48 pm
Forum: Technical Support
Topic: How much L2 cache? Backups?
Replies: 14
Views: 10971

Re: How much L2 cache? Backups?

RAMbo wrote:BTW I'm now investigating DrivePool and the other Stablebit programs. Really intesting stuff. I can even use it as part of my backup strategy.
It's excellent software, with a first class and very active development team. Can't go wrong there.
by Jaga
Sun Aug 19, 2018 9:55 am
Forum: Technical Support
Topic: L1 + L2 tasks and RAM allocation
Replies: 3
Views: 3253

Re: L1 + L2 tasks and RAM allocation

A RAID 0 stripe of SSDs working as a L2 is very advantageous, yes. You get enhanced read/write speeds, and the benefit of using cheaper/smaller drives. That's how I'm handling my 2x1TB SSDs for the Drivepool. I used a Primo Ram Disk for my temp folders and browser cache, though you have to be carefu...
by Jaga
Sun Aug 19, 2018 9:48 am
Forum: Technical Support
Topic: How much L2 cache? Backups?
Replies: 14
Views: 10971

Re: How much L2 cache? Backups?

I install PrimoCache. From that point on it starts learning and figures out file XYZ is extremly often accessed. So that file gets a very high access count. Doesn't that mean, the next time PrimoCache starts is pre-loads those blocks because it knows those blocks are so frequently accessed? Or does...
by Jaga
Sun Aug 19, 2018 8:08 am
Forum: Technical Support
Topic: L1 + L2 tasks and RAM allocation
Replies: 3
Views: 3253

Re: L1 + L2 tasks and RAM allocation

OTOH if PrimoCache just looks at how often blocks are accessed the situation may not be ideal either. Does a block from a 10x slower HDD count 10x more compared to a block from a fast SSD? Nope - different disk technologies aren't weighed differently. Any disk in the Cache Task is eligible for equa...