[OpenAFS] freezes acessing /afs/.git

Wed, 6 Aug 2014 15:32:34 +0200

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Hi!

I am getting very annoying freezes on the terminal from time to time. Today=
 I was able to trace them back to a git branch call for my fancy bash promp=
t. Normally it takes 0.06s to call git branch in my $HOME on afs but someti=
mes it takes about 54s. Tracing git branch showed me it is always hanging a=
t stat /afs/.git
I was also able to reproduce the hangs with:

while [ 1 ]; do /usr/bin/time test -d /afs/.git/; done

Playing around with the afsd options I found out that -afsdb was the root o=
f the problem. For the moment I have removed the -afsdb option to solve the=
 problem on my host. It also takes only 0.002s now to call git branch in my=
 $HOME.

What exactly may be the problem with -afsdb. Are my SRV records wrong or is=
 there a problem with my name server?
I am happy for any hints because removing the -afsdb option is complicated.=
=2E.

regards
Markus K=C3=B6berl
=2D-=20
Markus Koeberl
Graz University of Technology
Signal Processing and Speech Communication Laboratory
E-mail: markus.koeberl@tugraz.at

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<html><head><meta name=3D"qrichtext" content=3D"1" /><style type=3D"text/cs=
s">
p, li { white-space: pre-wrap; }
</style></head><body style=3D" font-family:'DejaVu Sans Mono'; font-size:9p=
t; font-weight:400; font-style:normal;">
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Hi!</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I am gettin=
g very annoying freezes on the terminal from time to time. Today I was able=
 to trace them back to a git branch call for my fancy bash prompt. Normally=
 it takes 0.06s to call git branch in my $HOME on afs but sometimes it take=
s about 54s. Tracing git branch showed me it is always hanging at stat /afs=
/.git</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I was also =
able to reproduce the hangs with:</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">while [ 1 ]=
; do /usr/bin/time test -d /afs/.git/; done</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Playing aro=
und with the afsd options I found out that -afsdb was the root of the probl=
em. For the moment I have removed the -afsdb option to solve the problem on=
 my host. It also takes only 0.002s now to call git branch in my $HOME.</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">What exactl=
y may be the problem with -afsdb. Are my SRV records wrong or is there a pr=
oblem with my name server?</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I am happy =
for any hints because removing the -afsdb option is complicated...</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">regards</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Markus K=C3=
=B6berl</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">-- </p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Markus Koeb=
erl</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Graz Univer=
sity of Technology</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Signal Proc=
essing and Speech Communication Laboratory</p>
<p style=3D" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-rig=
ht:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">E-mail: mar=
kus.koeberl@tugraz.at</p>
<p style=3D"-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; ma=
rgin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; ">&nb=
sp;</p></body></html>
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