From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Zhuravlev Date: Tue, 19 Feb 2008 18:19:12 +0300 Subject: [Lustre-devel] storing SOM epoch in EA In-Reply-To: <47BAF252.9050409@sun.com> References: <47BAA607.1000600@sun.com> <47BAAF3F.6030301@sun.com> <200802191359.47379.vitaly@sun.com> <47BAB962.8010901@sun.com> <47BABB01.8060402@sun.com> <47BAC53A.2030106@sun.com> <47BAF252.9050409@sun.com> Message-ID: <47BAF370.7030804@sun.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org Yuriy Umanets wrote: > I did not mean to put whole inode in IAM. I meant only put there fid as > key and epoch as value. So way to access epoch is shorter with IAM as no > need to load inode. But these all need to be well thought as all your > mention more seeks, new reads, etc. I don't understand benefits of this approach. the idea is to pack frequently accessed data together so that we don't need additional seeks and load/store these data with a single contiguous IO. thanks, Alex