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[Please, CC replies to me directly as I am not subscribed to the
list. Thank you.]<br>
<br>
Joe Landman wrote:<br>
<blockquote type="cite">
<blockquote style="border-left: #5555EE solid 0.2em; margin: 0em;
padding-left: 0.85em">
<pre style="margin: 0em;">As mentioned above, four test-files were used for the benchmark:
1. Small static file - 429 bytes
2. Larger static file - 93347 bytes
3. Small PHP file (a single php call in it – to phpinfo() function).
Although the file is small, its output was over 64Kb.
4. Large PHP file (apc.php). Although the file is larger, its output
was only about 12Kb.
</pre>
</blockquote>
<tt>One of the questions I routinely ask our customers is what
their </tt><tt>definitions of "small" and "large" are, as their
definitions might not </tt><tt>match what I use for these
terms.
</tt><tt>This is directly relevant in your case. What you call
"larger" is </tt><tt>considered small for GlusterFS. You want
MB sized IOs to amortize the </tt><tt>cost of the fuse system
calls.</tt></blockquote>
<div align="justify">But these files are representative of what our
web-servers will be serving -- primarily. Though there may be an
occasional video, mostly it is static HTML and "web-size" images,
plus PHP-scripts...<br>
<br>
Are you saying, GlusterFS is not really for us? We expected to pay
<i>some</i> performance penalty for the features, but the actual
numbers are causing a sticker-shock...<br>
<br>
(Writing to GlusterFS is even more horrid -- extracting
thunderbird-24.0.tar.bz2, for example, on a GlusterFS share takes
almost 30 minutes, instead of seconds on local FS, but we have
very few writes, and so were willing to ignore that.)<br>
</div>
<br>
<blockquote type="cite"><tt> Did you look at </tt><tt>the CSW
number? Is it also high?</tt></blockquote>
Around 8K per second, if I'm reading the output of vmstat correctly.<br>
<blockquote>-mi<br>
</blockquote>
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