![]() The latency of the optane is by far better than even regular NAND SSDs. What makes them a bottleneck is the delay for the read write head movement when you only want to read small files, i.e. If the number is more than 64MB, you can most likely reduce the cache size.Ĭlick to expand.To boost your 4k reads is the greatest boost you can give to your HDD (or any drive in general), as it should be "sufficiently" fast for larger files / sequential reads. If the value drops to 32MB that means most of the cache is used up and PrimoCache will start to discard or move around some cache blocks according to it's cache algorithm. Trying to find the right balance of cache allocation, block size, app usage and cache hit rate.Īnswering your question on what is the right size of RAM for the SSD/HDD - keep an eye at the Free Cache (L1/ L2) numbers for each drive. Decreasing the block size reduces memory usage and the opposite when increasing block size. Noticed that the app needs around 1GB of memory with this block size. Reaching out to Acronis for answers.Ĭurrently the block size is 64k. When partitioning the SSD into another section to implement Level 2 cache, Acronis boot loader is now giving me an error during start-up. The SSD capacity is small at 120GB and leaving 100GB for the OS. I'm playing around with small Level 2 cache - currently set to 12GB on the SSD. The system has just 16GB of RAM and allocating around 6GB to the Level 1 cache. I'm also using deferred write with a 10s default. The OS has a much lower cache hit rate (7% to 8%) from memory. ![]() Looking at the cache hit rates for the mechanical drives shows between 40% to 60%. Modded Samsung driver on the Corsair MP600 too. Multiply SEQ1M by 0.01 and R4K by 0.6 and look again. R4K: The stuff windows uses 66% of the time, while the large sequential #s advertisers wave around like burning flags is LESS THAN 1% of windows I/O. sys) as I get an extra 100 MB/s of R4K from my Optane (with a mod intel driver) on AMD that way. (You don't even need a SSD as a sys drive with Primocache or Intel RST etc running) Oh and you can back up the sys drive to that same separate drive if you're too lazy to redo all your settings.Īnd it's faster than most realise due to write coalescing etc and saves a ton of writes to your SSD. Self-created files on a separate drive with OneDrive and/or Google drive doing auto backups, plus copy-paste-delete rather than cut-paste Write caching on, buffer flushing disabled, Primocache or similar with deferred writes on at least 10 seconds, extra pagefiles on just about everything Windows install flash drive at the ready: ![]() OneDrive is probably backing all that up for you and anyway. If you have data you created yourself on the system drive you're in the wrong forum! If you give a damn about data you can simply download you're in the wrong forum. Stuff you downloaded off the internet, or files you personally created in a word processor etc or camera? I wonder why this isnt discussed more frequently as a way to increase your drive's read/write in addition to raid? If you guys have extra ram that you arent utilizing, I would highly recommend finding software that allows you to use your ram as a cache for your drives! Total before after, with hdd on left, and ssd on right & before on top, after on bottomĬlearly some massive increases to be had from utilizing your extra ram as a cache. Here are my crystal disk results before and after on each drive.Īfter ram cache (with 10 second deferred write = big performance increase) The hdd was also setup with a defer-write of 10 seconds, since its just a storage drive, and not my main, so the possibility of losing data from volatile ram isnt as concerning. I setup my ssd to have 40gb of read/write lvl 1 cache from my ram, with an 4kb block size, and i setup my hdd to have 20gb of read/write lvl1 cache from my ram, with an 8kb block size. I went ahead and downloaded the program/it comes with a 60day free trial. Since I have 128gb of ram already, and an a 1tb samsung evo and a 8tb seagate barracuda, I figured why not use some of that extra ram as lvl1 cache for both of my drives. It basically lets you utilize your excess ram or drives as lvl 1 or lvl 2 cache for any or all of your drives. I decided to go ahead and give primocache a try: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |