linux-ext4 - Re: [RFC] Thing 1: Shardmap fox Ext4

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Message-ID: <22c57727-2826-8945-1964-66e66fe82d39@phunq.net>
Date:   Wed, 4 Dec 2019 12:47:44 -0800
From:   Daniel Phillips <daniel@...nq.net>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     "Theodore Y. Ts'o" <tytso@....edu>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Subject: Re: [RFC] Thing 1: Shardmap fox Ext4

On 2019-12-04 10:03 a.m., Andreas Dilger wrote:
>> Here is a pretty picture to get started:
>>
>>    https://github.com/danielbot/Shardmap/wiki/Shardmap-media-format
> 
> The shardmap diagram is good conceptually, but it would be useful
> to add a legend on the empty side of the diagram that shows the on-disk
> structures.

Sounds good, but not sure exactly what you had in mind. Fields of a
shard entry? Fields of the block 0 header? The record entry block has
its own diagram, and is polymorphic anyway, so no fixed format.

Regards,

Daniel