rsync slowdown - 2 TB external USB 3.0

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rsync slowdown - 2 TB external USB 3.0

Postby serene » Sat Mar 08, 2014 10:16 am

Hi.

Problem:
Rsync drops from 80 Meg/sec to 3-10 Meg/sec

80 Megs/Sec
From laptop to external USB 3.0, 2 TB Western Digital
$ rsync -avP --stats -h /media/Laptop01/ /media/USB3/Backup01

3-10 Megs/Sec
When I want to do a snapshot, it bottlenecks...
$ rsync -avP --stats -h --link-dest=/media/USB3/Backup01/ /media/Laptop01/ /media/USB3/Snapshot01/

I've tried;
-forcing each of the (3) rsync processes to individual cpus
--no-compress --no-blocking-io
--temp-dir=/media/Laptop/Cache/
--bwlimit=30000
-disabling legacy usb
-temporary disalbe acpi /sys/firmware/acpi/interrupts...

I noticed the disk is stuck with 100 % usage;
$ iostat -xd 2

I've read tons of others with this problem, no solution has worked for me so far.

Might anyone have an idea for a solution ?

Thank you.
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serene
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Postby serene » Tue Mar 11, 2014 3:17 am

One of those unresolved mysteries...

Some bizzare foreign music filename characters were removed and now rsync behaves.

I couldn't find enough information on the --iconv=CONVERT_SPEC to make it useful so I just hunted down the culprits.

All seems OK now.

Cheers.

[SOLVED]
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serene
LXF regular
 
Posts: 111
Joined: Sun Jun 19, 2005 12:43 pm


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