c84cc71e4df12de399ff9c00bc68faf5b711ed62
max
  Mon May 31 06:54:06 2021 -0700
another gbic docs update, refs #27636

diff --git src/hg/htdocs/goldenPath/help/gbic.html src/hg/htdocs/goldenPath/help/gbic.html
index f12845e..071a3f8 100755
--- src/hg/htdocs/goldenPath/help/gbic.html
+++ src/hg/htdocs/goldenPath/help/gbic.html
@@ -30,41 +30,46 @@
 <a href='mirror.html#considerations-before-installing-a-genome-browser' title=''>Installation of a UCSC Genome Browser on a local machine (mirror)</a>
 page for a summary of installation options, including the pros and cons of using a mirror
 installation via the GBiC program vs. using GBiB.
 </p>
 
 <p>
 The program works by setting up MySQL (MariaDB), Apache, and Ghostscript, and then copying the
 Genome Browser CGIs onto the machine under <code>/usr/local/apache/</code>. Because it also deactivates the
 default Apache htdocs/cgi folders, it is best run on a new machine, or at least a host that is not
 already used as a web server. The tool can also download full or partial assembly databases,
 update the Genome Browser CGIs, and remove temporary files (aka &ldquo;trash cleaning&rdquo;).
 </p>
 
 <p>
 The GBiC program has been tested with Ubuntu 14/16/18/20 LTS, Centos 6/6.7/7.2/8, and Fedora 20.
-It has been tested on virtual machines in Amazon EC2 (Centos 6 and Ubuntu 14) and Microsoft
+</p>
+
+<p>It has been tested on virtual machines in Amazon EC2 (Centos 6 and Ubuntu 14) and Microsoft
 Azure (Ubuntu).</p>
 
 <p>If you want to load data on the fly from UCSC, you need to select the
 data centers &ldquo;US West (N. California)&rdquo; (Amazon) or &ldquo;West US&rdquo; (Microsoft) for best performance.
 Other data centers (e.g. East Coast) will require a local copy of the genome assembly, which
-requires 2TB-7TB of storage for the hg19 assembly. Note that this exceeds the
-current maximum size of a single Amazon EBS volume, so you may need to use RAID
-striping of multiple EBS volumes, or Amazon EFS for the /gbdb files and Amazon
-Aurora for the MySQL tables.
-</p>
+requires 2TB-7TB of storage for the hg19 assembly. Note that if you mirror multiple assemblies, 
+this may in rare cases exceed 16TB, the
+current maximum size of a single Amazon EBS volume. In these cases, may need to
+use RAID striping of multiple EBS volumes, or use Amazon EFS for the /gbdb files
+and Amazon Aurora for the MySQL tables. We have had one report from a user that the 
+MySQL performance is better when served from Aurora instead of being served
+from the same EC2 instance. However, the total cost may be slightly higher in
+Aurora, depending on the type of usage.  </p>
 
 <a name='quick-start-instructions'></a>
 <h2>Quick Start Instructions</h2>
 
 <p>
 Download the GBiC program from the <a href='https://genome-store.ucsc.edu/' title=''>UCSC Genome Browser store</a>.
 </p>
 
 <p>
 Run the program as root, like this:
 </p>
 
 <pre><code>sudo bash browserSetup.sh install</code></pre>
 
 <p>