Hosting

re: Hosting

typoo — Sun, 22 Feb 2004 06:58:00 GMT

Glad to see you've whipped that writer's block thingy.

New and Notable 37 - Some Notable CLR Posts

Sam Gentile's Blog — Sun, 22 Feb 2004 15:08:00 GMT

Items of interest pt3

Andrew Stopford's Weblog — Mon, 23 Feb 2004 01:26:00 GMT

re: Hosting

Pavel Lebedinsky — Mon, 23 Feb 2004 07:42:00 GMT

Looks like a lot of effort went into making this M:N thing work.

I personally think that the fiber mode was questionable design to begin with, and I would have preferred it CLR simply didn't support it (want to use managed code in SQL Server? use threads instead of fibers).

The M:N model might have some theoretical advantages but in the real world it's better to keep things simple. Once people start writing managed assemblies that run inside SQL Server in fiber mode I'm sure we'll see a lot of bugs caused by hidden thread affinity.

Items of interest pt3

Andrew Stopford's Weblog — Mon, 23 Feb 2004 16:07:00 GMT

re: Hosting

Chris Brumme — Mon, 23 Feb 2004 18:27:00 GMT

Pavel,

Every few weeks someone asks me whether fiber mode is the solution to their problems. Almost without bothering to understand their problems, I invariably tell them to stay away.

But for extremely sophisticated hosts (particularly hosts which, like SQL Server, have already committed deeply to fibers), the CLR doesn't have much choice. If we want to live in their world, we need to do the work.

Finally, I have a long term goal of removing any hard dependencies on OS threads from managed execution. This could well be a pipe dream. Even if it is achievable, it will take at least one decade and quite likely more. Indeed, it may take a new OS underneath us! But, long term, I hope that the managed abstraction over the OS will be so complete that nobody will PInvoke to OS APIs. At that time, the affinity issues will be controlled and we have a hope of introducing new techniques for implementing managed threads. We have some pretty wild ideas here. Some of these ideas are dependent on possible hardware changes, and they are all so hand-wavy that I would be embarrassed to talk about them.

This long term goal of abstracting away all the OS threading is part of the reason that we were willing to do the fiber work in Whidbey. It pushes managed execution a little further away from a 1:1 map over OS threads.

re: Invalid thread and process IDs

The Old New Thing — Tue, 24 Feb 2004 00:21:00 GMT

re: Hosting

Mike Dimmick — Wed, 25 Feb 2004 22:59:00 GMT

For anyone not following the MSDN Recently Posted feed, MSDN posted an interesting article on SQL Server fiber mode.

http://msdn.microsoft.com/data/default.aspx?pull=/library/en-us/dnsqldev/html/sqldev_02252004.asp

re: Hosting

LifeOnTitan — Thu, 26 Feb 2004 02:36:00 GMT

Another amazing piece of thinking. Thanks for sharing.

I would say that the advent of a fully managed kernel has got to be a top priority for Microsoft. Of course this means there will need to be an equivalent evolutionary leap among hardware designers. Looking forward to seeing how all of this evolves.

Keep thinking up,

Triton

Hosting, and Finalization

stevex.Text — Thu, 04 Mar 2004 17:17:00 GMT

Hosting, and Finalization

stevex.Text — Thu, 04 Mar 2004 17:18:00 GMT

On a server, paging = death

The Old New Thing — Wed, 17 Mar 2004 17:00:00 GMT

Even the tiniest memory leak will kill a server.

On a server, paging = death

The Old New Thing — Wed, 17 Mar 2004 17:54:00 GMT

Even the tiniest memory leak will kill a server.

All kinds of neat stuff, no wonder someone else wrote it :)

justinbigelow — Wed, 17 Mar 2004 17:56:00 GMT

re: Hosting

Michael Grier [MSFT] — Sun, 21 Mar 2004 00:38:00 GMT

Re: Pavel's comments about M:N scheduling:

SQL is trying to retire their T-SQL bytecode engine and replace it with the CLR engine. They're really not interested in running the frameworks or WinFx code; they just want to get rid of their own buggy and expensive T-SQL engine.

I tend to think that they shouldn't have picked up anything but the engine and MSCORLIB or they should have stuck with thread-only mode also. Most unmanaged code does NOT work in fiber mode. Things get changed to deal with fibers regularly but it really doesn't work that well as a general purpose facility. (In fact, it works just as well as SQL needs it to to deliver the best numbers possible.)

re: Hosting

Michael Grier [MSFT] — Tue, 23 Mar 2004 02:29:00 GMT

To clarify a few things, I wasn't trying to quantify the existing T-SQL code as actually being buggy. That was unkind. I'm sure it has bugs like any other nontrivial piece of software on the face of the planet and they really want to stop investing/expensing the work to maintain it, extend it and continue shipping it.

Chris Brumme Updates His Hosting and Finalization

Sam Gentile's Blog — Tue, 27 Apr 2004 01:14:00 GMT

re: Hosting

RichB — Tue, 27 Apr 2004 09:21:00 GMT

Now this has been updated with post-CTP info, the XXXX marks formerly hid "Escalation Policy" and all the information about them.

re: Hosting

Mike Dimmick — Tue, 27 Apr 2004 15:44:00 GMT

In case anyone else is confused about HostProtectionAttribute and doesn't have the Whidbey preview installed, there's documentation for it at (deep breath, long URL) http://longhorn.msdn.microsoft.com/?//longhorn.msdn.microsoft.com/lhsdk/ref/ns/system.security.permissions/c/hostprotectionattribute/hostprotectionattribute.aspx.

re: Hosting

Staffan Gustafsson — Mon, 14 Jun 2004 18:19:00 GMT

I'm curious about the "annocation of our unmanaged CLR methods with reliability contracts".

In what way do they differ from asserts, and is it a technique the rest of us can use to improve the stability/security of our applications?

re: To .NET or NOT, or maybe...

Vincent's Blog — Mon, 21 Jun 2004 16:01:00 GMT

re: Hosting

小说 — Sun, 27 Jun 2004 06:06:00 GMT

I want reading on my vocation rather to skiing.

re: Hosting

Chris Brumme — Thu, 01 Jul 2004 19:30:00 GMT

Staffan,

These annotations are on the unmanaged part of the engine, rather than in any managed code. They are just a bunch of templates and macros that allow us to organize a series of assertions into a block. We use PDB debug information for the binary image to perform static analysis over these blocks. This finds the bulk of violations efficiently. Then at runtime we also execute the blocks to find violations resulting from dynamic composition of call trees that cannot be discovered statically. We also redefine some C++ keywords like ‘return’ within the scope of our checked code, to ensure that flow control goes through macros that enable us to execute post-conditions.

It’s a pretty elaborate and somewhat clumsy set of mechanisms that are skewed towards some of the odd requirements of writing code inside the CLR engine. For instance, we have rules about coordination with the garbage collector and rules about unmanaged vs. managed exception Interop.

The bottom line is that I don’t think there’s anything that would apply directly to other unmanaged code (and certainly not to managed code). But the concept of declarative preconditions, postconditions and invariants that can be selectively checked statically and/or dynamically is a powerful one. It exists in some form in many complex programming systems that are chasing high reliability.

re: Hosting

Dave.NET — Thu, 22 Jul 2004 22:07:00 GMT

Chris,
In reviewing the .NET 2.0 Beta1 download I see the old hosting interface document is still included and do not see any documentation on the new 2.0 interfaces. I'd like to begin working with these new interfaces... how can one get access to the .DOC files for them?

re: Hosting

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Secure CLR Hosting in Whidbey / 2.0

Robert Hurlbut's .Net Blog — Fri, 10 Sep 2004 15:01:00 GMT

re: Why does Win32 even have Fibers?

Larry Osterman's WebLog — Thu, 06 Jan 2005 03:49:00 GMT

Ooh boy - .NET CLR Improvements are Making my Head Spin

Walt Ritscher: Thinking about code — Thu, 10 Mar 2005 05:04:00 GMT

Constrained Execution Regions and other errata [Brian Grunkemeyer]

BCLTeam's WebLog — Mon, 27 Jun 2005 23:42:35 GMT

A customer recently asked a good question about some of our new reliability features in Whidbey:

There...

Avoiding stalled forward progress

`(joe (@ (version "2.0")) ,(mk-blog)) — Sat, 09 Jul 2005 02:55:17 GMT

Avoiding stalled forward progress

`(joe (@ (version "2.0")) ,(mk-blog)) — Sat, 09 Jul 2005 03:03:24 GMT

Unmanaged Interop chapter

`(joe (@ (version "2.0")) ,(mk-blog)) — Mon, 11 Jul 2005 08:05:01 GMT

Unmanaged Interop chapter

`(joe (@ (version "2.0")) ,(mk-blog)) — Mon, 11 Jul 2005 08:07:48 GMT

Unmanaged Interop chapter

`(joe (@ (version "2.0")) ,(mk-blog)) — Mon, 11 Jul 2005 08:09:06 GMT

Unmanaged Interop chapter

`(joe (@ (version "2.0")) ,(mk-blog)) — Mon, 11 Jul 2005 10:13:24 GMT

Hosting Info Central » Blog Archive » cbrumme’s WebLog : Hosting

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SQL Server Yukon hosting the CLR

Niels SQL Server Blog — Sun, 26 Aug 2007 21:00:01 GMT

My blog has moved to sqlblogcasts.com/blogs/nielsb The full version of this post can be found here.,...

SQL Server Yukon hosting the CLR

Niels SQL Server Blog — Sun, 26 Aug 2007 21:04:35 GMT

By now, all of us probably know that SQL Server Yukon hosts the CLR, and this is what gives use the possibility

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