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10.5: How to create a RAM disk larger than 2.2GB
Instead of creating a stripe RAID, I'd suggest creating a concat RAID. The difference is that on a striped RAID (RAID 1), the operating system has more work to do (send block 1 to disk 1, block 2 to disk 2, block 3 to disk 1, block 4 to disk 2, and so on) than on a concatenated RAID (send the first 2.2GB to the first disk and the second 2.2GB to the second disk).
I am not sure if that'll solve the performance issue described by robg, but in theory, a concat RAID is faster than a stripe RAID.
10.5: How to create a RAM disk larger than 2.2GB
Would this help speed up transcoding with a utility like HandBrake?
10.5: How to create a RAM disk larger than 2.2GB
Generally speaking, any computation you can do in ram exclusively will help immenseley. I have mounted whole ISO's and used OSeX for various transcoding operations and it does help. For streaming or doing screen capture sessions, ram disks help a lot as well. Generally if you are coming from the dvd to the HDD, the dvd will be so slow that going from a previously captured iso copied to ram, then transcoded to ram disk would be much faster. You will have to get the initial iso from the slower dvd, but once it is saved you can transcode much faster if it is coming from HDD or ram into the cpu. I would go from HDD to another HDD, or HDD to ram , or RAM to RAM to be the fastest. I am not sure though that the HDD would be the bottleneck in this case since processing speeds may not be fast enough to starve from the data flow of an HDD? that would be a good test to perform!
10.5: How to create a RAM disk larger than 2.2GB
I thought I was logged in when I made the original post, but I guess I wasnt!
10.5: How to create a RAM disk larger than 2.2GB
The "concat" verb in place of "stripe" works, and it eliminates the soft raid bottlenecks. Thanks guys for the tips! |
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