Similarities

• Both Solr and Sphinx satisfy all of your requirements. They're fast and designed to index and search large bodies of data efficiently.
• Both have a long list of high-traffic sites using them (Solr, Sphinx)
• Both offer commercial support. (Solr, Sphinx)
• Both offer client API bindings for several platforms/languages (Sphinx, Solr)
• Both can be distributed to increase speed and capacity (Sphinx, Solr)

Here are some differences

• Solr, being an Apache project, is obviously is Apache2-licensed. Sphinx is GPLv2. This means that if you ever need to embed or extend (not just "use") Sphinx in a commercial application, you'll have to buy a commercial license.
• Solr is easily embeddable in Java applications.
• Solr is built on top of Lucene, which is a proven technology over 7 years old with a huge user base (this is only a small part). Whenever Lucene gets a new feature or speedup, Solr gets it too. Many of the devs committing to Solr are also Lucene committers.
• Sphinx integrates more tightly with RDBMSs, especially MySQL.
• Solr can be integrated with Hadoop to build distributed applications
• Solr can be integrated with Nutch to quickly build a fully-fledged web search engine with crawler.
• Solr can index proprietary formats like Microsoft Word, PDF, etc. Sphinx can't.
• Solr comes with a spell-checker out of the box.
• Solr comes with facet support out of the box. Faceting in Sphinx takes more work.
• Sphinx doesn't allow partial index updates for field data.
• In Sphinx, all document ids must be unique unsigned non-zero integer numbers. Solr doesn't even require a unique key for many operations, and unique keys can be either integers or strings.
• Solr supports field collapsing to avoid duplicating similar results. Sphinx doesn't seem to provide any feature like this.

Related questions

• http://stackoverflow.com/questions/1284083/choosing-a-stand-alone-full-text-search-server-sphinx-or-solr
• http://stackoverflow.com/questions/1132284/full-text-searching-with-rails
• http://stackoverflow.com/questions/737275/pros-cons-of-full-text-search-engine-lucene-sphinx-postgresql-full-text-searc

Conclusion

In my experience, Solr is very-very fast on the query side. It is also very powerful. The indexing side is very CPU and memory intensive and is an unfortunate side effect of having such a feature-rich, fast application. Nevertheless, I highly recommend Solr.

For disclaimer purposes, I have not had much experience with Sphinx and, again, all credit for this comparison goes to mausch.

By the way, here's a really good resource for Solr 1.4 that just came out: Solr 1.4 Enterprise Search. I have this book and it's quite helpful in explaining such topics as multicore setup, search methods, replication, etc.

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My fiancée Emilie has had her Palm Pre for about 2 weeks now, and one specific problem that started showing up last week has been incredibly annoying, causing us all kinds of trouble.

After Emilie got the phone, she added 3 email accounts – Gmail, Hotmail, and Yahoo. One day, after sending an email through the Pre, a popup showed up that said "Error sending" followed by the subject of that specific email. Swiping the error away didn't help – it just came back 5 minutes later. In fact, it has been coming back every 5 minutes of every day since, lighting up the screen each time. Thus, not only it was annoying, but it was running down the battery like crazy – a full charge lasted between 1/2 and 3/4 of the day with very mild usage.

I deleted the problematic message from the Outbox a long time ago. The error didn't disappear and kept popping up. Additionally, whichever Outbox clicking on the annoying popup led to was having trouble refreshing, even though it wouldn't display what the error actually was – just a yellow exclamation sign would show up. Refreshing the folder didn't help and would take an unusually long time.

Well, finally, I got sick of waiting for Palm to update its OS with possible fixes and set out to find one myself.

Turns out a ton of people are having the same issue, as evident in all Palm Pre forums. For example, Palm.com forum or Precentral.net forum. I really didn't like the common suggestion to delete and re-add the problematic account because

• that just most likely temporarily pushes the problem back as I'm sure it would come back again to haunt me
• this could potentially erase or disconnect all contacts associated with that account
• my engineering mind would be left puzzled
• I wasn't sure which account was having the problem (later it turned out the culprit was Yahoo)

Surprisingly, I found the clue that led me to the solution on Yahoo Answers – yeah, that place where nothing intelligent is allowed to exist (with certain exceptions).

The Solution

To make a long story short, Pre messed up Yahoo's outgoing mail settings. My particular problem was the SMTP (that's the outgoing mail server) port was set to 995, which is in fact an incoming POP3 mail server port. I don't know how it happened or if it even worked in the first place but the fact is: the right outgoing port for secure (SSL) SMTP connections is 465. Also, for some reason the SMTP username was blank but the password was filled in. WTF, Pre?

When I changed SMTP port to 465 and entered the username, as specified in that Yahoo Answers post (without the @yahoo.com part), the error message went away and the Outbox refreshed just fine. BTW, my Pre has the incoming mail server set to POP3, while the Yahoo Answers post was set to IMAP – again, why the differences? I'd frankly prefer IMAP anyway.

To get to your mail account settings, open up your email application, go to the Email menu in Pre's top left corner, tap Preferences & Accounts, then tap the offending account, scroll down, and tap Change Login Settings. When you are done, just swipe back (half swipe from right to left in the gesture area). Here's a handy screenshot I took of the relevant area:

->

If you are experiencing the same symptoms, check ALL your mail settings, not just the ones I mentioned. Who knows what else your Pre may have messed up?

Update: if you are having trouble sending your mail only while on WiFi, it is possible that your home broadband router is blocking the needed ports. Try to edit the router configuration and open the ports used by your Pre's mail configuration – hopefully the problem will be solved.

Conclusion

Palm, are you hearing us? We are not happy with the bugs and the unhelpful error messages (or lack thereof altogether)! 3 measly updates in the last 2 months is quite pathetic. I hope you are working on a much bigger update behind the scenes.

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I know that a multi-disk RAID array with a bunch of fast disks (15k RPM?) is probably the most important method of improving performance, followed by the amount of RAM, so I'm trying to find the best combination/balance of the two. However, server prices on the Internet range so much that I don't even know where to begin to tell a good deal from a bad one. I don't think SSDs can play a role here, because we need at least 200GB of usable space per machine. For comparison, we currently use the following spec: Dual quadcore Intel, 16GB RAM, 200GB RAID1 + 1TB RAID1 using SATA drives (eww?) in a 2U rack (a bit too chunky, isn't it?) made by Zantaz. It performs quite nicely but I think it chokes on the amount of writes way too early.

So, what does everyone think the best configuration is under $10,000? Bonus points if you can provide a link to the vendor site or at least a model number!

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各位土豆：
为了给大家提供更好的服务，我们正在搬迁扩建土豆的中心机房。
3月14日凌晨0:00 ~ 夜间24:00，我们的服务暂停24小时。
3月15日凌晨0:00 新机房就搬迁完成了，土豆会准时回家。

Now, neither Travis nor I know the language of Chinese, so what do we do? Go to Google Translate, of course. Here's what Google Translate produced:

That's:

Members potatoes:
In order to provide you with better service, we are expanding the relocation of the central room of potatoes.
March 14 at 0:00 to 24:00 at night, our services will be suspended for 24 hours.
March 15 at 0:00 new room on the relocation is complete, potatoes will be time to go home.

No wonder the servers went down, being powered by potatoes from a central room of potatoes and all. I guess expanding to a larger room of even more potatoes was the only way out.

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