Hi,<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Nov 6, 2012 at 12:27 PM, Soumendu Bhattacharya <span dir="ltr"><<a href="mailto:soumendu_bhattacharya@non.agilent.com" target="_blank">soumendu_bhattacharya@non.agilent.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><p class="MsoNormal"> <br></p><p class="MsoNormal"><u></u></p><p class="MsoNormal">
Can someone please highlight if Varnish can do the following :<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p><u></u><span>1.<span style="font:7.0pt "Times New Roman""> </span></span><u></u>Varnish Cache clustering (ie different physical servers hosting Varnish will share the same cache among them ). If this is doable , can someone give a brief of how they have implemented this. Currently we have only tested Varnish with cache as malloc or file .</p>
</div></blockquote><div>No. Varnish servers can't share cache. You probably don't need this if you set up stuff right. You might want to hash incoming requests on the URL so you don't get any cache duplication. If you are worried about sudden drops in hit rate if a server should fail you might want to look into a setup with some depth (ie two layers of cache). However, my recommendation is to keep things simple. Varnish is fairly robust and once it is up and running it tends to stay that way.</div>
<div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><p> <u></u><u></u></p><p><u></u><span>2.<span style="font:7.0pt "Times New Roman""> </span></span><u></u>Can the above be done if Persistent Store is used (i.e cache clustering using Persistent Store). ? if yes, would be really obliged if someone can provide some pointers as to how to set this up.</p>
</div></blockquote><div>n/a </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><p> <u></u><u></u></p><p><u></u><span>3.<span style="font:7.0pt "Times New Roman""> </span></span><u></u>Is Persistent store an option for a Production environment ? ( read somewhere that its experimental).</p>
</div></blockquote><div><br></div><div>We have people running it in production for certain workloads and it is stable. However, the cache semantics would be FIFO and not LRU and that might not suite your workload.</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><p><u></u><u></u></p><p class="MsoNormal"><u></u> </p></div></blockquote></div>-- <br><div style="font-size:12.727272033691406px;margin:5px 15px 0px 0px;padding-bottom:5px;color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255)">
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