An anonymous reader writes: Algolia is a buzzword-compliant ("Hosted Search API that delivers instant and relevant results") start-up that uses a lot of open-source software (including various strains of Linux) and a lot of solid-state disk, and as such sometimes runs into problems with each of these. Their blog this week features a fascinating look at troubles that they faced with ext4 filesystems mysteriously flipping to read-only mode: not such a good thing for machines processing a search index, not just dishing it out. The NGINX daemon serving all the HTTP(S) communication of our API was up and ready to serve the search queries but the indexing process crashed. Since the indexing process is guarded by supervise, crashing in a loop would have been understandable but a complete crash was not. As it turned out the filesystem was in a read-only mode. All right, let’s assume it was a cosmic ray
:) The filesystem got fixed, files were restored from another healthy server and everything looked fine again.
The next day another server ended with filesystem in read-only, two hours after another one and then next hour another one. Something was going on. After restoring the filesystem and the files, it was time for serious analysis since this was not a one time thing.
The rest of the story explains how they isolated the problem and worked around it; it turns out that the culprit was TRIM, or rather TRIM's interaction with certain SSDs: The system was issuing a TRIM to erase empty blocks, the command got misinterpreted by the drive and the controller erased blocks it was not supposed to. Therefore our files ended-up with 512 bytes of zeroes, files smaller than 512 bytes were completely zeroed. When we were lucky enough, the misbehaving TRIM hit the super-block of the filesystem and caused a corruption.
Since SSDs are becoming the norm outside the data center as well as within, some of the problems that their analysis exposed for one company probably would be good to test for elsewhere. One upshot: As a result, we informed our server provider about the affected SSDs and they informed the manufacturer. Our new deployments were switched to different SSD drives and we don’t recommend anyone to use any SSD that is anyhow mentioned in a bad way by the Linux kernel.
How about we not turn one sentence, unverified, anonymous reports of stuff not working on websites into Slashdot stories. Might as well pipe our corporate helpdesk ticketing system into the Slashdot story submitter. "MY MONITAR WIL NOT TURN ON!!11!!"
2.5ms from my Rackspace Cloud server: ping slashdot.org PING slashdot.org (184.108.40.206) 56(84) bytes of data. 64 bytes from slashdot.org (220.127.116.11): icmp_seq=1 ttl=246 time=2.56 ms 64 bytes from slashdot.org (18.104.22.168): icmp_seq=2 ttl=246 time=3.05 ms 64 bytes from slashdot.org (22.214.171.124): icmp_seq=3 ttl=246 time=2.90 ms 64 bytes from slashdot.org (126.96.36.199): icmp_seq=4 ttl=246 time=2.52 ms 64 bytes from slashdot.org (188.8.131.52): icmp_seq=5 ttl=246 time=3.79 ms 64 bytes from slashdot.org (184.108.40.206): icmp_seq=6 ttl=246 time=2.63 ms 64 bytes from slashdot.org (220.127.116.11): icmp_seq=7 ttl=246 time=2.75 ms ^C --- slashdot.org ping statistics --- 7 packets transmitted, 7 received, 0% packet loss, time 6008ms rtt min/avg/max/mdev = 2.524/2.890/3.791/0.408 ms
Peanut allergies are a very real thing. That said, I don't agree with schools banning PB&J from the cafeteria because 1 kid has an allergy. There are other ways to handle that kind of thing, like teach the kid to stay away from peanuts.
Yeah, the thing is it already has taken off. They can hardly add additional capacity fast enough. AWS is a very profitable business for Amazon. Our company switched from a traditional data center setup to running fully on AWS and it did reduce our costs and increase our agility and scalability. That said, like anything it's not a fit for everybody.
Jeopardy doesn't stream online -- heck, they don't even make past episodes available online. Best bet is www.channelsurf.eu
wouldn't they still need some special license to rent out the DVDs?
With a connection like that it's about latency, not just pure speed. Also you usually get an SLA. Not so with residential FiOS.
I was an early adopter of FiOS in 2006. Had the 5/2 plan for $29.99. Since then the price has slowly increased. Last year they doubled by download speed and started charging me $49.99 for 10/2. If I had it to do over again, I'd have stuck with DSL. I don't need anything faster than 5/2. Now I'm stuck with a minimum price of $50/month. Lame.
Our company was one of those preorders. We were testing our product on lots of different tablets. We received the JooJoo, saw what a piece of garbage it was, and returned it for a full refund.
aren't all words made up?
Am I the only one who read this headline as "The Spread of Do-It-Yourself, Biotch!"
Most Muslims will ignore it and call them "retards". It's the extremists that everyone is scared of. Those crying out against the burning are scared that this will provoke another 9/11. You know how there was this one quiet strange kid in school that no one would pick on? This is kinda the same thing.
I can't begin to understand why these calculators, which have been around for many years and still have the same features and functions, cost the same as they did when I was in school about 15 years ago. http://xkcd.com/768/