<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:10pt"><div><span><br></span></div><div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 12pt;"> <div class="y_msg_container"><br><div id="yiv7260768748">


 
 

<title>wod</title>

<style type="text/css">
#yiv7260768748 .yiv7260768748ReadMsgBody {
width:100%;}

#yiv7260768748 .yiv7260768748ExternalClass {
width:100%;}

#yiv7260768748 body {
font-family:Calibri, Helvetica, sans-serif;margin:0;padding:0;background-color:#eee;font-size:16px;}

#yiv7260768748 table {
font-family:Calibri, Helvetica, sans-serif;font-size:16px;}

#yiv7260768748 a {color:#006ba3;text-decoration:underline;}

#yiv7260768748 a img {
border:none;margin:0;padding:0;}
 _filtered #yiv7260768748 {
background-color:#eee;margin:0 !important;padding:0 !important;}
#yiv7260768748 td .filtered99999  {width:320px !important;height:auto !important;padding-top:0 !important;}
#yiv7260768748 table .filtered99999  {width:320px !important;height:auto !important;}
#yiv7260768748 table .filtered99999  {width:280px !important;height:auto !important;}
#yiv7260768748 td .filtered99999  {width:280px !important;height:auto !important;float:left;padding-left:0 !important;padding-bottom:30px !important;}
#yiv7260768748 td .filtered99999  {width:280px !important;height:auto !important;float:left;padding-right:0 !important;border:none !important;padding-bottom:30px !important;}

#yiv7260768748 td .filtered99999 {width:320px !important;height:auto !important;float:left;}
#yiv7260768748 table .filtered99999  {width:300px !important;height:auto !important;}
#yiv7260768748 td .filtered99999  {width:320px !important;height:auto !important;}
#yiv7260768748 img .filtered99999  {height:16px !important;}
#yiv7260768748 td .filtered99999  {display:none;}
#yiv7260768748 td .filtered99999  {padding-bottom:15px;}
#yiv7260768748 

</style>



  <div>
        <table class="yiv7260768748emailwrapto320" cellpadding="0" cellspacing="0" bgcolor="#eee" border="0" width="600">
            
            <tbody><tr>
                <td class="yiv7260768748emailwrapto320" width="600">
    <table class="yiv7260768748emailwrapto320" cellpadding="0" cellspacing="0" bgcolor="#333333" border="0" width="600">
              <tbody><tr>
      <td class="yiv7260768748newsletterTitle" style="color:#ffffff;font-family:calibri, arial, sans-serif;font-size:24px;padding-top:10px;padding-left:10px;" align="left"><b>Word of the Day</b></td>
      <td style="padding-left:10px;padding-right:10px;padding-top:19px;float:right;" align="right" valign="top"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727709/15327947"><img src="http://cdn.ttgtmedia.com/rms/newsletters/whatis/headerLogo_137x21.png" alt="WhatIs.com" class="yiv7260768748logoWidth" border="0"></a></td> 
      </tr>
      <tr>
      <td colspan="2" style="color:#ccc;font-family:calibri, arial, sans-serif;font-size:12px;padding-left:10px;padding-bottom:10px;" align="left"><i>Daily updates on the latest technology terms</i> | May 28, 2014</td>
      </tr> 
    </tbody></table>
    </td>
   </tr>
            <tr>
                <td class="yiv7260768748emailwrapto320">
    <table class="yiv7260768748emailwrapto320" style="font-size:17px;" cellpadding="20" cellspacing="0" align="center" bgcolor="#fff" border="0" width="600">
                                   
                        <tbody><tr>
                            <td style="margin:20px 20px 20px 20px;padding-top:10px;border:1px solid #ccc;border-top:none;" bgcolor="#ffffff" width="558">
                                <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" align="center" bgcolor="#ffffff" border="0">
                                    <tbody><tr>
          <td colspan="2" style="font-family:Calibri, arial, sans-serif;font-size:32px;font-weight:bold;padding:0 0 5px 0;color:#04aca0;">memory ballooning</td>
          </tr>
         <tr>
           <td colspan="2" style="color:#333;font-family:calibri, arial, sans-serif;font-size:17px;padding:7px 0 40px 0;">
              <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727711/15327947">Memory ballooning</a> is a memory management technique that allows a physical host to take advantage of unused memory on its guest virtual machines (VMs).</div>
              <div>When a host OS is short on physical memory, the hypervisor polls balloon drivers installed on the guests to request available memory. The guests respond by using page-reclaiming algorithms to determine which pages are available and can be assigned to the balloon drivers. The process of assigning available pages to the driver is known as inflating the balloon. Releasing available pages is known as deflating the balloon. </div>
              <div><span style="margin-top:0;margin-bottom:0;">In a positive sense, memory ballooning allows that the total amount of RAM required by guest virtual machines to exceed the amount of physically available RAM on the host.</span> A problem can occur, however, when a balloon driver inflates to the point where the guest VM no longer has the memory it needs to run processes within the guest. In such a scenario, the guest operating system will start swapping things out to deal with its
 memory issues. This swap activity can negatively affect performance, depending upon the amount of memory to recoup and/or the quality of the storage IOPS delivered to the VM. </div>
              <div>Other memory-reclaiming techniques include memory overcommit, memory paging, memory mirroring and transparent page sharing. <br>
              </div>
              
<div class="yiv7260768748luna-Ent"><span class="yiv7260768748dnindex"><span id="yiv7260768748hotword"><span id="yiv7260768748hotword" class="yiv7260768748hwc"></span></span></span>
  
</div>

           </td>
          </tr>
                                    <tr>
                                      <td style="padding:0 20px 10px 0;border-right:1px dotted #ccc;" class="yiv7260768748emailcolsplit_leftCol" valign="top" width="50%">
                                      <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" border="0" width="100%">
                                        <tbody><tr class="yiv7260768748emailwrapto280">
                                          <td colspan="2" style="font-family:Calibri, arial, sans-serif;font-size:21px;color:#333;font-weight:bold;border-bottom:5px solid #8dcfc8;padding-bottom:2px;"><div style="margin-top:0;margin-bottom:0;">Quote of the Day</div></td>
                                        </tr>
                                        <tr class="yiv7260768748emailwrapto280">
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:14px;padding-left:10px;padding-top:15px;" valign="top"><div style="margin-top:0;margin-bottom:0;"><img src="http://itknowledgeexchange.techtarget.com/overheard/files/2014/05/ericshanks.jpg" height="78" width="60"><br>
                                          </div></td>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:14px;padding-left:10px;padding-top:15px;" valign="top"><div>"Memory Ballooning is a technique that is only engaged when the host is running low on physical memory.  If you have a host with 60 GB of physical memory available and the virtual machines are only allocated a total of 30GB of memory, then you may never need to know what memory ballooning is all about." - <a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727712/15327947">Eric Shanks</a><br>
                                          </div></td>
                                        </tr>
                                      </tbody></table>
                                      <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" border="0" width="100%">
                                        <tbody><tr class="yiv7260768748emailwrapto280">
                                          <td style="font-family:Calibri, arial, sans-serif;font-size:21px;color:#333;font-weight:bold;border-bottom:5px solid #8dcfc8;padding-bottom:2px;"><div style="margin-top:0;margin-bottom:0;"> </div>
                                          <div style="margin-top:0;margin-bottom:0;">Fun Fact</div></td>
                                        </tr>
                                        <tr class="yiv7260768748emailwrapto280">
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:14px;padding-left:10px;padding-top:15px;" valign="top"><div>In a VMware environment, the balloon driver only activates when memory becomes 
scarce. In a Windows Server 
environment, the balloon driver allocates RAM to the VM on-demand. <br>
                                          </div></td>
                                        </tr>
                                      </tbody></table>
                                      </td>
                                      <td style="padding:0 0 10px 20px;" class="yiv7260768748emailcolsplit_rightCol" valign="top" width="50%">
                                      <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" border="0" width="100%">
                                        <tbody><tr>
                                          <td style="font-family:Calibri, arial, sans-serif;font-size:21px;color:#333;font-weight:bold;border-bottom:5px solid #8dcfc8;padding-bottom:2px;">Related Terms</td>
                                        </tr>
                                        <tr>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:12px;font-weight:bold;padding:15px 0 0 0;" valign="top">Related Terms </td>
                                        </tr>
                                        <tr></tr>
                                        <tr>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:13px;padding:7px 0 0 10px;" valign="top"><div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727713/15327947">hypervisor</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727714/15327947">memory overcommit</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727715/15327947">memory mirroring</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727716/15327947">memory paging</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727717/15327947">transparent page sharing</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727718/15327947">memory management</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727719/15327947">virtual memory</a></div>
                                            <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727720/15327947">paging</a></div>
                                          <div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://searchsolidstatestorage.techtarget.com/definition/IOPS-Input-Output-Operations-Per-Second?track=NL-1823&ad=893917">IOPS</a></div></td>
                                        </tr>
                                        <tr>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:12px;font-weight:bold;padding:15px 0 0 0;" valign="top"><div style="margin-top:0;margin-bottom:0;">Related Tags</div></td>
                                        </tr>
                                        <tr>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:13px;padding:7px 0 0 10px;" valign="top"><div style="margin-top:0;margin-bottom:0;"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727721/15327947">Capacity planning for virtualization</a>, <a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727722/15327947">Virtual machine provisioning and
 configuration</a></div></td>
                                        </tr>
                                      </tbody></table>
                                      </td>
                                  </tr>
                                    <tr><td colspan="2" class="yiv7260768748noDisplay" height="20px"> </td></tr>

                                    <tr>
                                      <td style="padding:0 20px 10px 0;border-right:1px dotted #ccc;" class="yiv7260768748emailcolsplit_leftCol" valign="top" width="50%">
                                      <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" border="0" width="100%">
                                        <tbody><tr>
                                          <td colspan="2" style="font-family:Calibri, arial, sans-serif;font-size:21px;color:#333;font-weight:bold;border-bottom:5px solid #8dcfc8;padding-bottom:2px;">Required Reading</td>
                                        </tr>
                                        <tr>
                                          <td style="color:#666;font-family:Calibri, arial, sans-serif;font-size:13px;padding:15px 0 0 0;" valign="top"><div><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727723/15327947">Virtual memory management techniques: A beginner's guide</a><br>
                                            Learn six virtual memory management techniques for improving memory sharing, preventing shortages and resolving memory overutilization.</div>
                                            <div><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727724/15327947">Optimizing resources with vSphere memory management techniques</a><br>
                                            Learn about VMware's vSphere memory management techniques and how they can help you over-allocate memory in a vSphere environment.</div>
                                            <div><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727725/15327947">Memory methods still differ for Microsoft and VMware</a><br>
                                              Dig deep into the memory management differences that still remain between Microsoft Hyper-V R2 SP1 and VMware ESX server virtualization.</div></td>
                                        </tr>
                                      </tbody></table>
                                      </td>
                                      <td style="padding:0 0 10px 20px;" class="yiv7260768748emailcolsplit_rightCol" valign="top" width="50%">
                                      <table class="yiv7260768748emailwrapto280" cellpadding="0" cellspacing="0" border="0" width="100%">
                                        <tbody><tr>
                                          <td colspan="2" style="font-family:Calibri, arial, sans-serif;font-size:21px;color:#333;font-weight:bold;border-bottom:5px solid #8dcfc8;padding-bottom:2px;">Stay In Touch</td>
                                        </tr>
                                        <tr>
                                          <td colspan="2" style="color:#333;font-family:Calibri, arial, sans-serif;font-size:12px;font-weight:bold;padding:10px 0 0 0;" valign="top">FOLLOW WHATIS.COM</td>
                                        </tr>
                                        <tr>
                                          <td colspan="2" style="color:#333;font-family:Calibri, arial, sans-serif;font-size:13px;padding:7px 0 0 0;" valign="top"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727726/15327947"><img src="http://cdn.ttgtmedia.com/rms/newsletters/whatis/button_twitter_25x25.png" alt="Twitter"></a><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727727/15327947" style="padding-left:5px;"><img src="http://cdn.ttgtmedia.com/rms/newsletters/whatis/button_rss_24x25.png" alt="RSS"></a></td>
                                        </tr>
                                        <tr>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:12px;font-weight:bold;padding:30px 0 0 0;" valign="top" width="25%"><img src="http://itknowledgeexchange.techtarget.com/overheard/files/2014/02/margaret_rouse_bw1.jpg" height="53" width="60"></td>
                                          <td style="color:#333;font-family:Calibri, arial, sans-serif;font-size:12px;font-weight:bold;padding:30px 0 0 0;" valign="top" width="75%">  <div style="margin-top:0;margin-bottom:0;"> </div>
                                          <div style="margin-top:0;margin-bottom:0;">CONTACT US</div></td>
                                        </tr>
                                        <tr>
                                          <td colspan="2" style="color:#666;font-family:Calibri, arial, sans-serif;font-size:13px;padding:3px 0 0 0;"><div style="margin-top:0;margin-bottom:0;">For feedback about any of our definitions or to send us ideas for new definitions, please contact us at: <a rel="nofollow" ymailto="mailto:mrouse@techtarget.com" target="_blank" href="mailto:mrouse@techtarget.com">editor@techtarget.com</a></div></td>
                                        </tr>
                                      </tbody></table>
                                      </td>
                                  </tr>
                                </tbody></table>
                            </td>
                        </tr>
                    </tbody></table>
                    <table class="yiv7260768748emailwrapto320" cellpadding="0" cellspacing="0" border="0" width="600">
                        <tbody><tr>
 <td style="color:#666666;font-family:calibri, arial, sans-serif;font-size:13px;padding-top:10px;padding-left:10px;" class="yiv7260768748colwrapto320" width="492"><b>About This E-Newsletter</b>
  <br>
  This e-newsletter is published by the TechTarget network. To unsubscribe from Whatis.com, <a rel="nofollow" target="_blank" href="http://searchtechtarget.techtarget.com/u/?track=NL-1823&ad=893917&em=amarandu%40yahoo.co.uk&uid=15327947&eid=893917&" style="color:#003399;">click here</a>. Please note, this will not affect any other subscriptions you have signed up for.
 </td>
 <td style="padding-left:10px;padding-right:10px;padding-top:10px;" class="yiv7260768748colwrapto320" align="right" valign="top" width="96"><a rel="nofollow" target="_blank" href="http://go.techtarget.com/r/29727728/15327947"><img src="http://media.techtarget.com/digitalguide/images/Misc/techtarget_logo_86x45.png?track=NL-1823&ad=893917" alt="TechTarget"></a></td> 
</tr>
<tr><td colspan="2" style="color:#666666;font-family:calibri, arial, sans-serif;font-size:13px;padding-bottom:10px;padding-left:10px;" class="yiv7260768748colwrapto320">
<br>
  TechTarget, Whatis, 275 Grove Street, Newton, MA 02466. Contact: <a rel="nofollow" ymailto="mailto:webmaster@techtarget.com" target="_blank" href="mailto:webmaster@techtarget.com" style="color:#003399;">webmaster@techtarget.com </a>
   <br><br>
  Copyright 2013 TechTarget. All rights reserved.</td>
</tr>

                    </tbody></table>
                </td>
            </tr>
        </tbody></table>

 
<img src="http://go.techtarget.com/clear.jpg?g=554896&u=15327947" height="1" width="1"></div>
 



</div><br><br></div> </div><div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 10pt;"> </div>  </div></body></html>