I've got about 1/2 the snapshots and less than 1/10th the data...but my btrfs check times are much shorter than either: 15 minutes and 65 minutes (lowmem).
[chris@f28s ~]$ sudo btrfs fi us /mnt/first Overall: Device size: 1024.00GiB Device allocated: 774.12GiB Device unallocated: 249.87GiB Device missing: 0.00B Used: 760.48GiB Free (estimated): 256.95GiB (min: 132.01GiB) Data ratio: 1.00 Metadata ratio: 2.00 Global reserve: 512.00MiB (used: 0.00B) Data,single: Size:761.00GiB, Used:753.93GiB /dev/mapper/first 761.00GiB Metadata,DUP: Size:6.50GiB, Used:3.28GiB /dev/mapper/first 13.00GiB System,DUP: Size:64.00MiB, Used:112.00KiB /dev/mapper/first 128.00MiB Unallocated: /dev/mapper/first 249.87GiB 146 subvolumes 137 snapshots total csum bytes: 790549924 total tree bytes: 3519250432 total fs tree bytes: 2546073600 total extent tree bytes: 131350528 Original mode check takes ~15 minutes Lowmem mode takes ~65 minutes RAM: 4G CPU: Intel(R) Pentium(R) CPU N3700 @ 1.60GHz Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html