Am 09.05.19 um 14:43 schrieb Lothar Schilling: > Am 09.05.2019 um 13:27 schrieb Martin: >> [..] >>> hdparm -tT /dev/sda >>> /dev/sda: >>> Timing cached reads: 13348 MB in 2.00 seconds = 6683.42 MB/sec >>> Timing buffered disk reads: 1014 MB in 3.00 seconds = 337.72 MB/sec >>> >>> iotop -o (for rsync and cp) >>> Total DISK READ : 0.00 B/s | Total DISK WRITE : 476.15 K/s >>> Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 487.86 K/s >>> TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND >>> 19531 be/4 root 0.00 B/s 476.15 K/s 0.00 % 99.24 % rsync >>> --info=progress2 /daten/testfile /daten/testfile2 >>> >>> iotop -o (for dd) >>> Total DISK READ : 0.00 B/s | Total DISK WRITE : 297.68 M/s >>> Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 297.68 M/s >>> TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND >>> 19557 be/4 root 0.00 B/s 297.68 M/s 0.00 % 99.99 % dd >>> if=/dev/zero of=/daten/testfile bs=1G count=10 oflag=direct >> Show us the 'dd if=/daten/testfile bs=1G oflag=direct of=/dev/null', please. >> If this is as slow as this ~480k/s above, check your disk's health status. >> Like with smartmontools or some disk-utility software. >> >> Martin >> > Fast enough... > > dd if=/daten/testfile bs=1G oflag=direct of=/daten/testfile2 > 10+0 Datensätze ein > 10+0 Datensätze aus > 10737418240 Bytes (11 GB, 10 GiB) kopiert, 72,7297 s, 148 MB/s > > dd if=/daten/testfile of=/dev/null > 20971520+0 Datensätze ein > 20971520+0 Datensätze aus > 10737418240 Bytes (11 GB, 10 GiB) kopiert, 36,6887 s, 293 MB/s >
Well, this looks quite consistent. How does your system load look, like in top? Do you see any high 'wait' or 'system' numbers? Then, I have seen a thing called 'systemd.resource-control'. Which I have close to zero knowledge about. Can systemd throttle a copy command? May be some one from this list can tell.
