Magma June 2008

magma@lists.squeakfoundation.org

6 participants
9 discussions

How to install latest Magma beta, let's try this again..
by Chris Muller 06 Jul '08

06 Jul '08

Ok, there continue to be questions about "how do I install Magma?" Unfortunately 3.9 was delivered with Monticello Configurations totally broken and even Monticello 1.5 does not seem fix it. I have not tried LevelPlayingField yet, but if you want a smaller simpler fix, I have attached two (previously-published) packages to this e-mail that you can load into a standard 3.9-7067 image so you can actually use Monticello Configurations. Here are the steps to load the latest and greatest Magma. 1) boot up a standard 3.9-7067 image. 2) load the attached Monticello-SR.315.mcz. 3) load the attached MonticelloConfigurations-cmm.44.mcz. 4) add the following HTTP repository to Monticello's repository list: MCHttpRepository location: 'http://www.squeaksource.com/MagmaTester' user: '' password: '' 5) Scroll down to the bottom of the package list, you should see "r41Beta4". 6) Click it, in the right-hand pane you see "r41Beta4.mcm". This is a MonticelloConfiguration file, it simply lists all of the packages for that configuration. Click it. 7) Click "Load". Magma is now loaded. Please let me know if further clarification is still needed. I'm sorry it is not easier. 3.9, in itself, was the most painful release of Squeak ever IMO. I have more than a dozen patches to the 7067 image just to get to an image with basic tool stability, doesn't everyone? My personal goal is for you to have a "one-click" load and then a reasonably stable and working ODBMS. Is Magma the only system out there made up of multiple independent Monticello packages? Someone please tell me what is the best practice for deployment of such a system and I will be happy to do it. - Chris PS - Note, this mail is about loading the *beta* release of Magma. At this time, barring any super solutions to Squeaks packaging systems, I plan for the *Stable* release of Magma will continue to be SAR. SAR's offer unlimited flexibility and compatible across all recent versions of Squeak (since 3.7 I think).

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multiple concurrent access?
by sol tourne 01 Jul '08

01 Jul '08

hi - I have a server with 6 different seaside images (with different applications) all connecting to the same user database. Can magma handle such a scenario with several concurrent access (vast majority is read, but all can write) from various seaside applications in distinct images? (The information I found on the wiki seemed somewhat contradictory in this respect, so I'm double-checking here, sorry for the noise!) ts

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r41Beta5
by Chris Muller 30 Jun '08

30 Jun '08

I have just posted r41Beta5 to the MagmaTester project of squeaksource. Testing on slow networks has revealed compression can make a significant improvement! However, compressing *everything* can be wasteful for very small ByteArray's. The lz compression adds a 20-byte header, so it is really wasteful with tiny requests/responses for both computers to go through compression/decompression cost while INCREASING the number of bytes to send over the network. So I went ahead and chose an arbitrary threshold of 200 bytes. Any request/response over 200 bytes will be compressed. This threshold can be tweaked if necessary, but the benchmark results are really good compared to all-compression or no-compression. Magma now basically maintains the framework-oscillation rate at the high level we get on fast networks, while still providing exceptional benefit for slow networks. Also available is a new version of Magma Tools. There are several improvements to the benchmarker. - Now reporting totals for MagmaBenchmarker. Also including the Client Session Statistics Report, subtotaled by benchmark test! - Also included is the Server Statistics Report. - The statistics report also now includes versions of *all* packages instead of just MagmaTester. - Now disconnecting the session after running the test! The cumulative performance enhancements for r41 are starting to accumulate into a significant overall improvement! Enjoy, Chris

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Magma Release Lifecycle
by Chris Muller 27 Jun '08

27 Jun '08

This is the release process for Magma at this time. http://wiki.squeak.org/squeak/6057

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Installing r41Beta4
by Chris Muller 26 Jun '08

26 Jun '08

Source code for beta releases of Magma are currently posted in "Monticello Configurations" (but if anyone has suggestions for a more effective collaboration, please speak up). MC Configurations are simply a list of specific package versions that make up the entire Magma suite. Although there are three installations of Magma, "client", "server" and "tester", the beta releases only come in the "tester" flavor, which makes sense since they are still under development and need to undergo more testing anyway. To install the new r41Beta4 Magma in a fresh 3.9 image, here are the steps to take: - Load Monticello 1.5 from SqueakMap (I loaded the "1.5.436-bootstrap" version). - Add this HTTP repository to the Monticello browser: MCHttpRepository location: 'http://www.squeaksource.com/MagmaTester' user: 'squeak' password: 'squeak' - Open the repository, scroll down to the bottom and you will see "r41Beta4" in the left-hand pane. Load that one. Installing in Squeak 3.10.2: 3.10.2 appears to have problems with support for loading Monticello Configurations. I was not able to even select the r41Beta4 package because it produced the error stack below. Keith, do you know what is needed to get MC Configurations working with 3.10? Is this even something that should be done or is the community moving toward Universes or even another configuration system? - Chris

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r41Beta3 and r41Beta4
by Chris Muller 24 Jun '08

24 Jun '08

I've just posted two new configurations to the MagmaTester project of SqueakSource. It is a new beta for release 41 with several improvements: - An all-new performance and system-health monitoring package called "Ma Statistics" has been added and utilized internally by all layers of the Magma architecture. - Performance statistics for the last half-hour (hour, day, week, your choice) are captured in five-minute (also adjustable) intervals. Is the server taxed or loafing? What was the average response time for clients? What was the longest response-time for any single request for any client? What was the average size of each response? These and dozens of other statistics are now captured while the server runs with no performance penalty. - The #statistics and #serverStatistics answers a rich domain of the statistics for the MagmaSession and server, respectively. User-interfaces to analyze Statistics domains could disrupt Magma server performance, so should be run in client images. - Studying the output of this model after running a real-world Magma application revealed an opportunity for optimization in the networking layer ("Ma client server"). MaTcpRequestServers now maintain up to 50 simultaneous socket connections for significantly improved performance, especially on low-bandwidth connections. r41Beta3 actually goes one step further and compresses all ByteArrays sent over the network using the LZ77 algorithm included in 3.9. This was an experiment to address a performance on applications with heavily constrained network bandwidth. However, the compression slows things down considerably on fast networks, and r41Beta4 is the same exact code without the compression. Due to the other improvements it, too, still shows improved performance on slow network connections. So I'm moving forward without compression at this point. This release 41 has about execution performance. It has already brought 1000X improvements in simple query's and caching of the prototocol for faster connection times. Now it is still faster than it ever has been, though that's not to say there will be no more opportunities for further improvements. Enjoy, Chris

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loading version 41
by Ramiro Diaz Trepat 22 Jun '08

22 Jun '08

I was just trying to load the latest magma version, but I was unable to find it. I saw a mail from Chris saying that it was available on Monticello Configurations but I don't have it on my 3.10 dev image. Any pointers? Thanks r.

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Re: Can't stop Magma instance
by Kyle Dawkins 21 Jun '08

21 Jun '08

That worked! Thanks so much :) On Jun 20, 2008, at 6:41 PM, Hernán Morales wrote: > MagmaSession cleanUp. > MagmaServerConsole allInstancesDo: [:i | i shutdown ].

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Can't stop Magma instance
by Kyle Dawkins 21 Jun '08

21 Jun '08

Hey guys Sorry for the n00b question, but I'm new to Magma (and Squeak) and have only been playing with it for a few days. I created an image and installed the Magma server stuff in it, and successfully created a server, added some objects remotely, etc. and it all worked as advertised. Then I accidentally closed my inspector window that I had running in my Magma image, and now I can't figure out how to shut the server down. I know it must be something basic about either Squeak or Magma, but I have no idea how to stop it. Any help would be greatly appreciated. Thanks! Kyle kyle(a)idealist.org

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Magma June 2008