<html><head></head><body>The subject line says it all.<br><br><div class="gmail_quote">On March 14, 2021 3:54:01 AM EDT, Tod Fassl via Ale <ale@ale.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">If your database server doesn't need all 24 cores, then just run your <br>print server on there too. Make it your file server, your authentication <br>server, your DNS server, your DHCP server, your NTP server, and while <br>you're at it, your condor central manager too. After all, that is <br>*exactly* what you are doing by running all those virtual machines on <br>there. Only thing is you're adding a $10K licensing fee and a whole lot <br>of other headaches on top of it.<br><br><br>If a single 24-core machine can handle all the stuff I am running on <br>those virtual machines, why in the world would I pay VMWare an extra <br>$10K instead of just running them on a bare metal Linux server? The <br>principle here is that hardware is cheaper than staff time -- which is <br>*exactly* my point! I don't want to have to dick around with VMWare when <br>Linux does everything I need it to do.<br><br><br>On 3/12/21 11:15 AM, DJ-Pfulio via Ale wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">On 3/12/21 11:47 AM, Tod Fassl via Ale wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;">Now, running your vm on someone else's cluster -- that I can<br>understand. But running your own? No, that's dumb.<br></blockquote> Not if your server has 24 cores and the DBMS only needs 2 to work<br> fast.<br> More cores and more RAM doesn't always translate to faster<br> results.<br><br> In a business, there is a trade off in having optimal use for HW.<br> If the DBMS is just 5% slower, but you can get 10 more systems<br> on the same HW for $0, that would be a huge win most places.<br><br> I see people with 16-core systems who decide to run a 16-core VM<br> with 32G of RAM because they can. Then we have them explain their<br> workload and suggest a 4 vCPU and 8GB RAM VM. Crazy, but it runs<br> faster.<br> With Linux, it is usually best to begin with 1-2 vCPUs and only<br> scale up when you know it is actually necessary.<hr> Ale mailing list<br> Ale@ale.org<br> <a href="https://mail.ale.org/mailman/listinfo/ale">https://mail.ale.org/mailman/listinfo/ale</a><br> See JOBS, ANNOUNCE and SCHOOLS lists at<br> <a href="http://mail.ale.org/mailman/listinfo">http://mail.ale.org/mailman/listinfo</a><br></blockquote><hr>Ale mailing list<br>Ale@ale.org<br><a href="https://mail.ale.org/mailman/listinfo/ale">https://mail.ale.org/mailman/listinfo/ale</a><br>See JOBS, ANNOUNCE and SCHOOLS lists at<br><a href="http://mail.ale.org/mailman/listinfo">http://mail.ale.org/mailman/listinfo</a><br></pre></blockquote></div><br>-- <br>Computers amplify human error<br>Super computers are really cool</body></html>