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From: Patrick Farrell <paf@cray.com>
To: lustre-devel@lists.lustre.org
Subject: [lustre-devel] Compact layouts
Date: Fri, 16 Nov 2018 18:06:41 +0000	[thread overview]
Message-ID: <3600968B-94D3-4C3F-857A-D00A5C3BC601@cray.com> (raw)

All,

There is an old idea for reducing the data required to describe file striping by using a bitmap to record which OSTs are in use.  As best I can tell, this was most recently described here:
http://wiki.lustre.org/Layout_Enhancement_Solution_Architecture#Compact_Layouts_2

I?m curious if this has been pursued any further, if there?s a JIRA or other place that might have more info or be tracking the idea.  I poked around and didn?t find anything.

In particular, this comment:
?with enough data that for each OST index set in the bitmap, a corresponding OST object FID may be computed?
Points at the difficult part of implementing this.

So, before I get too far considering this problem - Is there more out there somewhere?  Hoping to avoid duplicating work!

Thanks,

  *   Patrick
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             reply	other threads:[~2018-11-16 18:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-16 18:06 Patrick Farrell [this message]
2018-11-21 23:53 ` [lustre-devel] Compact layouts Andreas Dilger
2018-11-22  2:27   ` Patrick Farrell
2018-11-22  2:30     ` John Bent
2018-11-22  2:41       ` Patrick Farrell
2018-11-22  2:53         ` Patrick Farrell
2018-11-22  3:29     ` Andreas Dilger
2018-11-22  6:53       ` George Melikov

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