<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Jul 16, 2012, at 10:28 PM, Ryan Kubica wrote:</div><blockquote type="cite"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: arial, helvetica, sans-serif; font-size: 10pt; position: static; z-index: auto; "><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">I've never run
into this issue before (and store a <span style="font-weight: bold;">lot</span> of data) and on 64bit hosts, but:</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-tab-span" style="white-space:pre"> </span>a) I always compile rrdtool not use stock OS rpm</div></div></div></blockquote><div><br></div>This isn't a common situation -- most people use RPMs, and that means that this is broken for most people. Also we are using a package that bundles a binary image of rrdtool, another situation where many people won't or can't change it out.</div><div><br><blockquote type="cite"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: arial, helvetica, sans-serif; font-size: 10pt; position: static; z-index: auto; "><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-tab-span" style="white-space:pre"> </span>b) It is compiled with mmap()</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-tab-span" style="white-space:pre"> </span>c) I only resize an rrdtool file when it's not being written to (my apps write daemon does the resize in place as a task.)</div></div></div></blockquote><div><br></div>That's not a choice I get. This system is too critical to stop updates long enough for that to happen. (although I have been digging around in the code to see if there is any locking mechanism that rrdtool will honor)</div><div><br><blockquote type="cite"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: arial, helvetica, sans-serif; font-size: 10pt; position: static; z-index: auto; "><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; ">and it works for resizes just fine (just tested manually), I grew RRA 0 by 2x.</div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div><div><span style="font-size: 13px;">[tmp]$ grep 1340865780 *xml</span></div><div><span style="font-size: 13px;">Epic_io_90.xml:<span class="Apple-tab-span" style="white-space:pre"> </span><!-- 2012-06-28 06:43:00 UTC / 1340865780 --> <row><v>9.7033939036e+04</v></row></span></div><div><span style="font-size: 13px;">resize.xml:<span class="Apple-tab-span" style="white-space:pre"> </span><!-- 2012-06-28 06:43:00 UTC / 1340865780 --> <row><v>9.7033939036e+04</v></row></span></div><div><span style="font-size: 13px;"><br></span></div><div><span style="font-size: 13px;">[tmp]$ grep 1340865840 *xml</span></div><div><span style="font-size: 13px;">Epic_io_90.xml:<span class="Apple-tab-span" style="white-space:pre"> </span><!-- 2012-06-28 06:44:00 UTC / 1340865840 --> <row><v>9.7633476991e+04</v></row></span></div><div><span style="font-size: 13px;">resize.xml:<span class="Apple-tab-span" style="white-space:pre"> </span><!-- 2012-06-28 06:44:00 UTC / 1340865840 --> <row><v>9.7633476991e+04</v></row></span></div></div></div></div></blockquote><div><br></div>Curious, what OS / kernel are you using?</div><div><br></div><div>
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