<div dir="ltr"><p style="font-family:arial,sans-serif;font-size:14px">Hello. </p><p style="font-family:arial,sans-serif;font-size:14px">My name is Rucia for Samsung SDS.</p><p style="font-family:arial,sans-serif;font-size:14px">
<br></p><p style="font-family:arial,sans-serif;font-size:14px">I had in truouble in volume deleting.</p><p style="font-family:arial,sans-serif;font-size:14px">I am developing for supporting big data storage such as hadoop in lvm.</p>
<p style="font-family:arial,sans-serif;font-size:14px"><br></p><p style="font-family:arial,sans-serif;font-size:14px">it use as a full disk io for deleting of cinder lvm volume because of dd the high disk I/O affects the other hadoop instance on same host.</p>
<p style="font-family:arial,sans-serif;font-size:14px"><br></p><p style="font-family:arial,sans-serif;font-size:14px">If using dd for deleting the volume, it takes too much time for deleting of cinder lvm volume because of dd.</p>
<div style="font-family:arial,sans-serif;font-size:14px"><font face="arial, sans-serif">Cinder volume is 200GB for supporting hadoop master data.</font></div><div style="font-family:arial,sans-serif;font-size:14px"><font face="arial, sans-serif"><br>
</font></div><div style="font-family:arial,sans-serif;font-size:14px"><font face="arial, sans-serif">When i delete cinder volume in using 'dd if=/dev/zero of $cinder-volume count=1000000 bs=1M' it takes about 30 minutes.</font></div>
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So When I delete the volume, i added disk id scheduler, ionice.</p><p id="yui_3_10_3_1_1388042957699_1246" style="margin:0px 0px 1.2em;padding:0px;width:auto;max-width:45em;color:rgb(51,51,51);font-family:sans-serif;line-height:18px">
Thanks.</p><p><font face="arial, sans-serif"><span style="font-size:14px"><a href="https://blueprints.launchpad.net/cinder/+spec/when-deleting-volume-dd-performance">https://blueprints.launchpad.net/cinder/+spec/when-deleting-volume-dd-performance</a></span></font><br>
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