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busthead

Array Performance Issue?

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Hello, I'm running unRAID v6.6.6 on a HP Compaq 6000 Pro Microtower. I've installed "Community Applications" Plugin and Zoneminder Docker.

 

I appear to be experiencing a performance issue that I don't know how to debug. Any help would be much appreciated.

 

You can see below, I've issued a rsync command to copy from 192.168.0.232 to unRAID and the file transfer speed has slowed to a crawl. I verified that the 192.168.0.232 server is performing well.

 

root@Tower:/# rsync --progress -rltuv root@192.168.0.232:/mnt/Vol1/ /mnt/user/unRAID/
root@192.168.0.232's password:
receiving incremental file list
./
.windows
              0 100%    0.00kB/s    0:00:00 (xfr#1, ir-chk=7016/7018)
Backups/
Backups/.DS_Store
          8,196 100%    7.82MB/s    0:00:00 (xfr#2, ir-chk=7011/7018)
Backups/._.DS_Store
          4,096 100%    3.91MB/s    0:00:00 (xfr#3, ir-chk=7010/7018)
Backups/Amy (Mac Mini)/
Backups/Amy (Mac Mini)/.DS_Store
          6,148 100%    5.86MB/s    0:00:00 (xfr#4, ir-chk=6991/7018)
Backups/Amy (Mac Mini)/._.DS_Store
          4,096 100%    1.95MB/s    0:00:00 (xfr#5, ir-chk=6990/7018)
Backups/Amy (Mac Mini)/._Macintosh HD.dmg
          4,096 100%    1.30MB/s    0:00:00 (xfr#6, ir-chk=6989/7018)
Backups/Amy (Mac Mini)/Macintosh HD.dmg
 20,678,180,864  62%   19.85kB/s  176:00:06
 20,760,494,080  62%   19.85kB/s  174:50:47
 20,763,115,520  62%    7.44kB/s  466:37:33

 20,763,377,664  62%    0.62kB/s 5578:17:22

tower-diagnostics-20190102-2235.zip

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Thank you for the guidance. I wasn't able to reboot or shutdown via the GUI so I had to powerdown from the CLI. Disk 1 filesystem check output is attached. I then tried the rsync again with similar results:

 

Backups/Amy (Mac Mini)/Macintosh HD.dmg
 12,365,856,768  37%   19.85kB/s  292:19:07
 12,387,876,864  37%   19.85kB/s  292:00:17
 12,395,216,896  37%   19.85kB/s  291:53:47

 

 

Disk1_Filesystem_Check.txt

tower-diagnostics-20190104-1244.zip

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Looks like I have a bad stick of RAM. Will try the rsync again and report back.

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Removing the bad RAM fixed the issue. That said, rsync is topping out at approx. 21 MB/s.

 

When I manually copy (SMB) a large file from the same source host to a different destination host, my laptop, I get 120 MB/s. All three systems are connected to the same switch.

 

SMB get from the same source to unRAID averages approx. 65-70 MB/s

 

Why is rsync three times as slow as SMB with the same source and destination and almost six times slower than SMB from the same source to a different destination on the same switch?

 

Thx

 

 

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1 hour ago, busthead said:

SMB get from the same source to unRAID averages approx. 65-70 MB/s

This seems normal. Maybe better than normal. Are you using Turbo Write? Writes to the parity array are slower than single disk write speed due to parity updates.

 

 

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2 hours ago, busthead said:

That said, rsync is topping out at approx. 21 MB/s.

Rsync command line you're using?

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5 hours ago, johnnie.black said:

Rsync command line you're using?

rsync --progress -rltuv root@192.168.0.232:/mnt/Vol1/ /mnt/user/unRAID/

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That should be fine, just checking you weren't using the compression flag, using a different cipher can give a little more performance with rsync but that doesn't explain 20MB/s, so something else is going on, assuming the CPUs in use are powerful enough, i.e., they are not a couple of single core Atom CPUs.

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8 hours ago, johnnie.black said:

assuming the CPUs in use are powerful enough

Intel(R) Core(TM)2 Duo CPU E7600 @ 3.06GHz

 

Neither CPU nor RAM appear to be the issue. Topping out at 23 MB/s. Diagnostics attached.

 

tower-diagnostics-20190110-1001.zip

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