Re: Speed Problem Copying Files
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
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