On 2017-02-28 06:52, L A Walsh wrote:
Carlos E. R. wrote:
Like I said, gzip -0 is "too much" -- any compression will be slower. 'grep' from a file in memory @2.7GB -- takes 1.24s. That gives 2.12TB/s. So far none of the compress utils exceed ~100MB/s
There is something wrong somewhere. My tests are old, anyway.
Really depends on your disks and backup media.
Yes, it does. For instance, with this laptop I have to backup via usb cable, which is slow. Compressing does make a difference.
--- Have you run 'dd' tests to see what max speeds are? remember to use direct i/o for writes, though best to test
USB 2, remember. That makes about 20..30 MB/s, IIRC. can be tested with "hdparm -tT", but I don't have the disk connected now. -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" (Minas Tirith))