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Hi,<br>
<br>
in general, programs use stderr (which you see after <err>) to
output miscellaneous information. You can see here that "dd" is an
example of this behaviour. While it exited successfully, it also
wrote non-essential information to its secondary output. You do not
see stdout (the primary channel) in the log because "dd" doesn't use
it in this case.<br>
<br>
Cheers,<br>
Ondra<br>
<br>
<div class="moz-cite-prefix">On 2.3.2016 17:41, <a class="moz-txt-link-abbreviated" href="mailto:paf1@email.cz">paf1@email.cz</a> wrote:<br>
</div>
<blockquote cite="mid:56D717BA.2080706@email.cz" type="cite">
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Hi, next explanation<br>
VDSM log give me following message<br>
Is this live checking for storage availability ? If "SUCCESS"
then why "<err> " ???<br>
<br>
regs.<br>
Pavel<br>
<br>
Thread-233::DEBUG::2016-03-02
17:31:55,275::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
SUCCESS: <err> = '0+1 records in\n0+1 records out\n346 bytes
(346 B) copied, 0.00022692 s, 1.5 MB/s\n'; <rc> = 0<br>
Thread-299::DEBUG::2016-03-02
17:31:57,870::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
/usr/bin/dd
if=/rhev/data-center/mnt/glusterSD/localhost:_2KVM12__P4/300e9ac8-3c2f-4703-9bb1-1df2130c7c97/dom_md/metadata
iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
Thread-299::DEBUG::2016-03-02
17:31:57,886::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
SUCCESS: <err> = '0+1 records in\n0+1 records out\n734 bytes
(734 B) copied, 0.000391403 s, 1.9 MB/s\n'; <rc> = 0<br>
Thread-209::DEBUG::2016-03-02
17:31:58,301::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
/usr/bin/dd
if=/rhev/data-center/mnt/glusterSD/localhost:_1KVM12-BCK/0fcad888-d573-47be-bef3-0bc0b7a99fb7/dom_md/metadata
iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
Thread-209::DEBUG::2016-03-02
17:31:58,318::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
SUCCESS: <err> = '0+1 records in\n0+1 records out\n335 bytes
(335 B) copied, 0.00048095 s, 697 kB/s\n'; <rc> = 0<br>
Thread-198::DEBUG::2016-03-02
17:31:58,885::fileSD::262::Storage.Misc.excCmd::(getReadDelay)
/usr/bin/dd
if=/rhev/data-center/mnt/installshare:_DATA3/7f334c9d-ac01-4b2a-9f29-af1d2f24c3e0/dom_md/metadata
iflag=direct of=/dev/null bs=4096 count=1 (cwd None)<br>
<br>
dist = RHEL - 7 - 2.1511<br>
kernel = 3.10.0 - 327.10.1.el7.x86_64<br>
KVM = 2.3.0 - 29.1.el7<br>
libvirt = libvirt-1.2.17-13.el7_2.3<br>
vdsm = vdsm-4.16.30-0.el7<br>
GlusterFS = glusterfs-3.7.8-1.el7<br>
<br>
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<br>
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