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<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>Please let me know your inputs on the
following,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>1) Under all path failure condition or the
device is removed from array (using management station), IO continues if
"queue_if_no_path" feature is enabled. As all the requests are cached
all the memory gets used out for this. Can there be any mechanism where the all
path failure is detected and marked, devices can be suspended or removed after
some time (user configurable). By doing this the OS stalling can be avoided
when the LUN is in dead state for prolonged period of time.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>2) I am not able to give partial product ID
string (substring) in /etc/multipath.conf as DM expects complete product
string. This requirement is needed to cater different product id strings for
same product. The XP array has the ids based on the emulation type of each LUN.
With the current settings available in /etc/multipath.conf, the
only option is to have separate “device” structs mentioning about
the policies/features for each LUN.<o:p></o:p></span></font></p>
<p><font size=2 face="Microsoft Sans Serif"><span style='font-size:10.0pt;
font-family:"Microsoft Sans Serif"'>Thanks<br>
-Murthy<o:p></o:p></span></font></p>
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