Slashdot Mirror

AutoZen: http://www.linuxlabs.com/autozen.shtml

No matter how much you train with it it won't improve your hearing. But it might make you a more interesting person.

Actually to wrench this back on-topic, it might be a really good synthetic test input for your non-medial hearing helper android app, since it can save to .wav files.

Even better, this is far enough out there that it could help make your non-medical home hearing test app (I'd pay $0.99 for that) less of a target for selling a medical device without a license lobbying^W lawsuits.

CURE-alpha is an MP3 player that supposedly emits alpha waves which calm and rejuvinate the brain.

Sounds like AutoZen

Not quite the same, but check out AutoZen anyway.

High availability is another one of those marketing buzz words that really doesn't have a good, nailed down definition.

You can acheive this in three basic ways. Each has their own pros and cons. I recommend that you weigh them out and come to a decision you think you can live with.

Clustering - You have a group of servers (physical hardware) each running the same software and working to stay synched up with each other. Now clustering comes in two flavors active/active and active/passive. The active/active clusters share the requests between them. The active/passive clusters wait for a node to fail and then another node in cluster assumes the active role.

Master/Slave - This is similiar to clustering in that you have a group of servers (physical pieces of hardware) each running copies of the software. The master does not service requests directly and operates only as a central repository replicating all the data to the slaves. The slaves synch with the master. If one slave fails, there is normally some means for another slave to take over. Note: While this is old and largely deprecated, it is still quite functional and cost-effective under certain circumstances.

Load-Balancing - There are several physical pieces of hardware who each process transactions all the time. All updates/writes/commits are sent to all the servers, but reads are serviced only by one. Note: Again, this is deprecated, but can still be quite functional in specific circumstances.

My experience has been that typically all that is needed for clustering to work is some shared drive space for the various instances in the cluster to manage their own internal bookkeeping. In all honesty, there are several factors here that would make a big difference in what I would recommend for you. One - how much data are you talking about storing? Two - What are you using it for? If this is driving your web site, a second or two of latency while something fails over won't be noticable to the end user. If you're transmitting medical records to an EMT team, it might be fatal. Three - Why are you looking at HA? What need are you trying to fill?

2 cents,

Queen B.

Links for you to consider -
http://www.linuxlabs.com/clusgres.html
http://www.openminds.co.uk/high_availability_solut ions/databases/postgresql.htm

PS: Yes, I like Postgres. It supports foreign key relationships out the box (ummm...*R*DMBS, anyone?) It also doesn't force me to put in unnecessary indexes to use fk's. I will say that MySQL has managed to address some of my previous complaints about not supporting views, stored procedures or triggers. I haven't had time to test their version 5 for now, so I'll be silent as I have no opinion on their implementation.

Have you tried AutoZen? It's generates tones that can help you change brain state. I sometimes use it before I sleep to try and induce lucid dreams.

AutoZen on.
AutoZen on.

All very true. Based on the descriptions from those who have tried nutmeg and morning glory, I don't think it would be worth it.

Belladonna is more of a deleriant and is much too lethal to be a good choice.

Personally, I use <plug type=shameless>Autozen</plug> Not very visual, but certainly interesting, and they can't very well ban a sound.

It's called Autozen http://www.linuxlabs.com/software/AutoZen.html

take a look at this software project AutoZen.

from their site: "AutoZen is a software 'brain machine' for Linux. It generates sounds that are meant to cause the brain to temporarily shift to a different dominant frequency and cause the user to experience an altered state of consciousness. It is similar to the devices seen in the 'Sharper Image' catalog and in magazine ads, but the price is a lot more attractive!"

Not when you're using a browser that doesn't come with flash...

Linux Labs will happily sell you clusters, either in standard or custom configurations.

My rough estimate from reading their website is that a 10-node 1.33-GHz Athlon cluster from them would price out at something like $16-17k.

I have been working on getting LinuxBIOS ready for sale in commercial systems. The three second boot is interesting, but really isn't a major attraction for servers. The real advantages are reliability, full configurability over serial console, diskless operation, built in rescue disk, and an OpenFirmware like capability.

A Flash chip is much more reliable and convieniant than a boot floppy. It is possable to use a flash boot image remotely over a serial console even if the root filesystem on the HD is damaged to the point of being unmountable. The kernel in the Flash just has to mount a rescue root fs in the chip (using the nftl driver in the MTD patch).

In normal operation, the LinuxBIOS kernel will boot up, and either mount the boot partition or load the final kernel image from a boot server. Then it used the two kernel monte module (kmonte) to boot into the final running kernel. Should that step fail, the rescue image can page the sysadmin for help.

For diskless operation, the final kernel loads from the server and mounts it's root via NFS. GFS over fibre channel is also a possability.

Currently, I have a prototype Scyld cluster where the slave nodes boot from LinuxBIOS. The slave nodes are not capable of video. I also have prototype with a 2.4 kernel that comes up with a fb_console.

<PLUG nature="shameless">Go to http://www.linuxlabs.com/linuxbios.html for FAQ on our 1U server and Scyld cluster systems using LinuxBIOS. They will be ready for sale in a few days.</PLUG>

Find a business that leases linux boxes and support, and they could do it, but I don't know of anyone out there yet

Go to google, search on "Linux workstation lease" and you will find some. Also try "linux PC lease". It's true that there aren't as many as for Windows, but they do exist. Many local companies would probably be willing to come up with an offer. I know that (shameless plug ahead) Linux Labs Would be willing to come up with a good offer.

A PQA is made up of a subset of HTML and images. The HTML is tokenized and compressed into a 5 bit data format.

Palm provides a windows based PQA compiler. I have a GPL compiler/decompiler posted at www.linuxlabs.com/software/linpqa.htm l. It's early alpha but it is useable (I've used it anyway).