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HAMMER update 09-June-2008

Previous thread: HEADS UP - HAMMER destabilized for a few days (update 2) by Matthew Dillon on Sunday, June 8, 2008 - 2:32 pm. (1 message)

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[view original message]
From: Matthew Dillon <dillon@...>
To: <kernel@...>
Subject: HAMMER update 09-June-2008
Date: Monday, June 9, 2008 - 9:08 pm

With the 53D commit HAMMER has stabilized again.  I will again

    recommend that people testing HAMMER update and newfs_hammer your

    filesystems.  53D located and corrected a data overwrite bug and

    53C corrected a freemap bug that could cause pruning/reblocking panics.


    I am continuing to work on various performance issues.  In particular,

    when I run blogbench I can make the system become extremely inefficient

    and writes initiated by the flusher, which are not subject to kernel

    restrictions, can 'take over' the system and cause everything else

    trying to write to a file to block for very long periods of time.


    I am considering making another change to the on-media format to

    increase the size of the B-Tree node from 16 elements to 64 elements.

    B-Tree operations appear to be HAMMER's only major hangup right now.

    Blogbench has shown that B-Tree updates can wind up being extremely

    disk-inefficient.  I have made a final decision on the matter yet,

    I need to play with the flusher's B-Tree updates for a few days first.


						-Matt
[view original message]
From: Chris Turner <c.turner@...>
To: <kernel@...>
Subject: Re: HAMMER update 09-June-2008
Date: Tuesday, June 10, 2008 - 1:08 am

you'd mentioned a mid-july release ..


is this the general remaining idea for 2.0 : stabilizing hammer ?


(question from guy with a patch-or-two to write :)


Thanks,


- Chris
[view original message]
From: Robert Luciani <rluciani@...>
To: <kernel@...>
Subject: Re: HAMMER update 09-June-2008
Date: Tuesday, June 10, 2008 - 4:45 am

Wouldn't it be nice to combine the "results" of the Summer of Code with

the 2.0 release? It'd be a really big and maybe somewhat experimental

release, worthy of the digit change. The SoC ends in the middle of August.


--

Robert Luciani

Chalmers University of Technology, SWE

Department of Computer Science and Engineering

http://www.rluciani.com/rluciani@gmail.com.asc
[view original message]
From: Sascha Wildner <saw@...>
To: <kernel@...>
Subject: Re: HAMMER update 09-June-2008
Date: Tuesday, June 10, 2008 - 5:03 am

Not sure.


I think we certainly wouldn't want to include things which only got

finished a week ago when the release happens (i.e., are probably not

widely tested).


Sascha


--

http://yoyodyne.ath.cx
[view original message]
From: Justin C. Sherrill <justin@...>
To: <kernel@...>
Subject: Re: HAMMER update 09-June-2008
Date: Tuesday, June 10, 2008 - 10:56 am

Plus there's always the chance that the student will want to add more

features outside the original project's charter, or that (hopefully less

likely) there will be some unfinished features that just didn't make the

deadline.
Previous thread: HEADS UP - HAMMER destabilized for a few days (update 2) by Matthew Dillon on Sunday, June 8, 2008 - 2:32 pm. (1 message)

Next thread: 0 bytes sized file can't be written to a HAMMER partition by Antonio Huete Jimenez on Tuesday, June 10, 2008 - 7:45 am. (3 messages)