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***Motivated by bug 687367 | ***Motivated by bug 687367 | ||
***This prevents any solution w/multiple I/O threads from working | ***This prevents any solution w/multiple I/O threads from working | ||
**What are the perf characteristics of read/write/seek on eMMC/HDD/SSD? | **What are the perf characteristics of read/write/seek on eMMC/SDCard/HDD/SSD? | ||
***Want these characteristics in similar situations to our cache | ***Want these characteristics in similar situations to our cache | ||
****R/W/S random in large file (simulate block files) | ****R/W/S random in large file (simulate block files) | ||
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***SSD | ***SSD | ||
***eMMC | ***eMMC | ||
***SDCard | |||
***Are there any statistically significant differences in these? | ***Are there any statistically significant differences in these? | ||
**Is there some threshold of device on which turning on the disk cache NEVER makes sense in its current form (or in the form we settle on for the first round) | **Is there some threshold of device on which turning on the disk cache NEVER makes sense in its current form (or in the form we settle on for the first round) |