On 10/24/2013 12:15 AM, Matthew Patton wrote:
25 to 30 percent reserve is strongly recommended for any write heavy workload.
The performance improvement will blow your mind.
A 240GB drive is a 256 with 7 percent reserve. Partition your device to 185 GB.
I thought (and maybe I'm wrong) that a good chunk of reserved space was
essential to allow the drive to efficiently manage its read-modify-write
cycles. It was my understanding that bcache was explicitly designed to
fill erase block sized chunks sequentially and discard them in whole
units, negating the requirement for the drive to actually perform RMW
cycles and therefore negating the requirement for the extra free space.
Have I got it wrong?
Regards,
Brad
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