Add support for HDF5 compact storage

Nobody has claimed this yet.

I tested this in a hacked version of Silo but discovered that if we use COMPACT storage mode for a lot of the smaller datasets a silo application generates, we can really reduce metadata thrashing. I would have put this into the 4.8 release but did not understand the implications enough to feel comfortable doing so. To actually enable this capability is dirt simple. However, to fully test it and see if it effects performance/diffing in some strange ways, will take some effort.

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Ticket number: 352
Status: New
Project: VisIt
Tracker: Feature
Priority: Normal
Subject: Add support for HDF5 compact storage
Assigned to: -
Category: -
Target version: -
Author: Mark Miller
Start: 08/19/2010
Due date:
% Done: 0%
Estimated time: 8.00 hours
Created: 08/19/2010 03:42 pm
Updated:
Likelihood:
Severity:
Found in version:
Impact: 4 - High
Expected Use: 4 - Common
OS: All
Support Group: Any
Description:
I tested this in a hacked version of Silo but discovered that if we use COMPACT storage mode for a lot of the smaller datasets a silo application generates, we can really reduce metadata thrashing. I would have put this into the 4.8 release but did not understand the implications enough to feel comfortable doing so. To actually enable this capability is dirt simple. However, to fully test it and see if it effects performance/diffing in some strange ways, will take some effort.

Comments:

No files, tests, or entry points are named. Start by locating Silo's handling of dataset storage modes and existing tests for metadata, performance, or diffing; then verify compact storage for smaller datasets and check that behavior and comparisons remain correct.

Written by the indexing model from the issue text.