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From: Hans Reiser <reiser@namesys.com>
To: Nicolas Smallwood <smallwood@maya.com>
Cc: reiser <reiserfs-list@namesys.com>, Vladimir Saveliev <vs@namesys.com>
Subject: Re: Atomicity with reiser4?
Date: Thu, 03 Feb 2005 12:02:55 -0800	[thread overview]
Message-ID: <4202836F.1050800@namesys.com> (raw)
In-Reply-To: <CMEFJOIJPCAMFCEKIEOEOEBLCGAA.smallwood@maya.com>

Nicolas Smallwood wrote:

>Its an internally built B Tree database that uses 4k blocksizes.
>Inside, we were loading "u-forms", a concept we use that involves
>having a UUID, and an e-form composed off attribute names and their values.
>Most of these are no more than say 17k.
>
>To ensure that writes do occur, we open transactions for every access to the
>b tree,
>and closing a transaction will call fsync.
>
>My test involved 20,000 u-forms, which would of course call fsync 20,000
>times.
>
>Using another of the filesystems, each is under or around two minutes with
>fsync.
>
>Based upon what you where telling me, is the size of an atom configurable?
>Or what is considered too large?
>
>Thanks,
>
>Nicolas Smallwood
>
>
>
>
>  
>
You might consider creating u-form item plugins and doing it within 
reiser4.....  performance should be drastically improved by that.....

  reply	other threads:[~2005-02-03 20:02 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CMEFJOIJPCAMFCEKIEOEAEBLCGAA.smallwood@maya.com>
2005-02-03 15:18 ` Atomicity with reiser4? Nicolas Smallwood
2005-02-03 20:02   ` Hans Reiser [this message]
2005-02-02 19:36 Nicolas Smallwood
2005-02-03  9:13 ` Vladimir Saveliev
2005-02-03 20:01   ` Hans Reiser

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