It might be related to the kernel’s watchdog code due to research by Linus Torvalds. “So I’m looking at the watchdog code, and it seems racy [with regard to] parking and startup…Quite frankly, I’m just grasping for straws here, but a lot of the watchdog traces really have seemed spurious…”
via [Phoronix] Nasty Lockup Issue Still Being Investigated For Linux 3.18.
A number of Bay Area companies have come to incorporate this insight into their marketing strategies. In 2004, shortly after launching the restaurant-review site Yelp, the founders were struggling to grow the company. They decided to convene a gathering of about 100 power-users. The get-together “was a big success,” Ligaya Tichy, who later served as Yelp’s senior community manager, told me. “Bringing users together to share what they loved about the site led to a huge spike in activity. What we realized is that people aren’t really motivated by companies. They’re motivated by other people. We needed to get the message across: you are what makes this product cool.” The number of reviewers on the site grew from 12,000 in 2005 to 100,000 in 2006.
The data collection does not happen automatically. There is a several-step process for team owners to request access, which includes sending a signed letter on company letterhead to Slack stating that the company’s policies allow that kind of access. Each request is reviewed by Slack for approval, the company says.
Once granted, workers on the team are notified of the data access, which includes all messages from that point forward. The feature is not retroactive.
via Slack now letting employers tap workers’ private chats | ITworld.
From: Slack: Be less busy.
Slack is a platform for team communication: everything in one place, instantly searchable, available wherever you go.
When the new Weather.com launches it will be the highest trafficked Drupal site in existence with over 1 billion page views per month.
via Mediacurrent | Weather.com Moves to Drupal.
On the technical side, our approach was to increase cache efficiency by utilizing Javascript and Edge Side Includes (ESI) for client side rendering as well as optimizing calls made to their content delivery network (CDN), Akamai.
The most prominent prior art invalidating this patent is the RAID6 (one of the most commonly used Erasure Code) implementation of the linux kernel. In an article dated 2004 (i.e. ten years before the patent was granted to StreamScale) it is described to be optimized as follows : For additional speed improvements, it is desirable to use any integer vector instruction set that happens to be available on the machine, such as MMX or SSE-2 on x86, AltiVec on PowerPC, etc. Where SSE2 is the acronym of Streaming SIMD Extensions 2. The patent cites Anvin aticle’s but only to state the problem and does not acknowledge it also contains the solution.
via Erasure Code Patents | Analysis of Erasure Code Patents for everyone.
You can use the mailq command sendmail -bp command to display a summary of the mail messages queued for future delivery. Type the following command:
# mailq
via Sendmail: Clear / Delete / Flush Mail Queue.
A service in a local server started to send email through my main server back to the originating server causing many errors in /var/log/maillog of my main server. Each attempt added a message to its message queue that was blocked due to a problem with sendmail on the originating server. The email being sent was sent automatically by a VOIP service I was testing on that originating server (not good).
You can cd to /var/spool/mqueue and delete all files if you want to get rid of all messages in the queue:
# cd /var/spool/mqueue/
# ls
# rm *
The above sequence cleared the queue so sendmail stopped trying to send those messages to a broken server at the destination.
Sendmail wouldn’t start. OS Fedora 19 so it’s running that new systemd for service startup. Here are pertinent error messages in /var/log/messages:
Nov 17 21:23:39 ana systemd[1]: Starting Sendmail Mail Transport Agent... Nov 17 21:23:39 ana sendmail[1555]: -bd is not supported by sSMTP Nov 17 21:23:39 ana systemd[1]: PID file /run/sendmail.pid not readable (yet?) after start. Nov 17 21:23:39 ana systemd[1]: Failed to start Sendmail Mail Transport Agent. Nov 17 21:23:39 ana systemd[1]: Dependency failed for Sendmail Mail Transport Client. Nov 17 21:23:39 ana systemd[1]: Unit sendmail.service entered failed state.
I did a lot of googling to find someone in a similar situation to no avail. I then looked into sSMTP and why that was being called instead of good old sendmail. After
#yum erase sSMTP
thus purging that service entirely from the system, sendmail starts in this Fedora 19 VM and works (knock on wood).
Unlike a normal virus scanner on consumer PCs that compares a catalog of known viruses to something that has infected the computer, A3 can detect new, unknown viruses or malware automatically by sensing that something is occurring in the computer’s operation that is not correct. It then can stop the virus, approximate a repair for the damaged software code, and then learn to never let that bug enter the machine again.
via Self-repairing software tackles malware — ScienceDaily.
The A3 software is open source, meaning it is free for anyone to use, but Eide believes many of the A3 technologies could be incorporated into commercial products
Download papers from the source: A3 : Flux Research Group
The A3 project applies virtualization, record-and-replay, introspection, repair, and other techniques to develop a customizable container for “advanced adaptive applications.” The A3 container provides its protected application with both innate and adaptive defenses against security threats.
Available Software
Stackdb — a VMI-enabled debugging library for multi-level systems (read the paper; browse the source code; git clone the source repository)
Weir — a streaming language for systems analysis (read the paper; browse the source code; git clone the source repository)
XenTT — a “time-traveling” hypervisor (docs and source code)
The little probe delivered everything expected from it, just as its failing battery dropped it into standby mode.
Philae is pressed up against a cliff. Deep shadows mean it cannot now get enough light on to its solar panels to recharge its systems.
via BBC News – Philae comet lander sends more data before losing power.
“Philae could come back later as we move closer to the sun, and we get more light onto the solar panels up against the cliff we’re at here in the shadows.”
From https://twitter.com/Philae2014
More stunning images from this historic voyage here.
From xkcd….
See the full xkcd animation at http://xkcd.com/1446/