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<div class=Section1>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>I am actually working on a multi-log
multi-host monitoring (and reacting) system, made in erlang and I need some
advice:<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>I would like to read logs file as soon
as data is written to them. I actually have found 2 ways for this purpose:<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>- With Io module, pooling (each time I
get an <span class=GramE>eof,</span> I wait a small time then try again).<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>- With ports, spawning "tail -f -n
1 /path/to/file", which is the method I currently use.<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>Is there <span class=GramE>a</span>
other way to "receive" news lines as they are written in the file
without pooling or using an external application? I read few messages saying
that there was no blocking IO in <span class=SpellE>erlang</span>, but I think
this was mainly from a VM perspective. (I will have few hundreds logs to
monitor)<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>I currently use the port solution and I
sometimes have a "broken pipe" error, I think this is because of the
"in" parameter in <span class=SpellE>open_port</span>, but I hat it
sometime without this parameter, anybody have a more detailed explanation of
what could happen ?<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
class=GramE><font size=2 face="Courier New"><span lang=EN-US style='font-size:
10.0pt;font-family:"Courier New";mso-ansi-language:EN-US'>Regards.</span></font></span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><span
class=SpellE><span class=GramE><font size=2 face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";mso-ansi-language:
EN-US'>Raphaël</span></font></span></span><span class=GramE><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US'>.</span></font></span><font size=2 face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";mso-ansi-language:
EN-US'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'>Ps: the subject is directly taken from a
point in the <span class=SpellE>erlang</span> PLEAC which is still empty.<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>Raphaël Bellec<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>Manobi </span></font><st1:country-region><st1:place><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";mso-ansi-language:EN-US;mso-no-proof:yes'>France</span></font></st1:place></st1:country-region><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>Cap Alpha<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>Avenue de l'Europe, Clapiers<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>34940 </span></font><st1:City><st1:place><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New";mso-ansi-language:EN-US;mso-no-proof:yes'>Montpellier</span></font></st1:place></st1:City><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";mso-ansi-language:EN-US;mso-no-proof:yes'> Cedex 09<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";
mso-ansi-language:EN-US;mso-no-proof:yes'>Tél : + 33 (0) 4 67 59 36 56<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none'><font size=2
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
mso-no-proof:yes'>Fax : + 33 (0) 4 67 59 30 10<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";mso-no-proof:yes'>E-mail : raphael.bellec@manobi.net</span></font><span
style='mso-no-proof:yes'><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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