sourcenouveau's questions

I am planning to purchase a server (Dell PowerEdge R740) with SSDs in RAID 10, and my priorities are write performance and data integrity. It will be running Linux. The SSDs have write caches with power loss protection.

It seems like these are my RAID options:

• PERC H330 (no cache), software RAID (pass-through)
• PERC H330 (no cache), hardware RAID (write-through)
• PERC H730P (2 Gb NV cache), hardware RAID (write-through)
• PERC H740P (8 Gb NV cache), hardware RAID (write-through)

My questions:

• Are any of these configurations at risk for data loss or corruption on power loss?
• Which configuration should I expect to have the best write performance?
• Are there any other benefits to an NV cache that I haven't considered?

Related questions:

• Software vs hardware RAID performance and cache usage
• How is LSI FastPath different from Software RAID?

I have a Windows box running Bamboo, a continuous integration server. I can download files from it over HTTP, but they're really slow, like 80 kbps slow. I don't have any speed issues copying files between the machine and network shares.

What are some steps I can take to debug this problem? I really don't know where to start.

Ubuntu/Lighttpd is not serving my UTF-8 encoded files with the correct Content-Type header. It's sending Content-Type: text/html rather than Content-Type: text/html; charset=UTF-8. How do I configure Lighttpd to send the correct headers?

I didn't see any useful settings in the default lighttpd.conf and am having trouble finding information in the documentation.