3 ms·
I have zero ideas how any of these work underneath, but out of a wild guess, is there any chance that alignment (or similar) is the issue? e.g. maybe RocksDB tr
by mehrdadn 8y ago
I have zero ideas how any of these work underneath, but out of a wild guess, is there any chance that alignment (or similar) is the issue? e.g. maybe RocksDB tries to align its writes to some boundary in a way that's awful for Optane's technology?
- wtallis 8y agoAlignment sounds like a plausible factor, but in my testing I've found that the penalty for unaligned writes on the Optane P4800X is less than a factor of two.
- hyc_symas 8y agoHadn't really thought of that. I suppose we could have retried by making a single partition taking up the entire space, and letting fdisk take care of aligning the start of the partition. But I assumed that alignment wouldn't be an issue when using the unpartitioned block device.