Add support for HDF5 compact storage

[aowen87]

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.

-----------------------REDMINE MIGRATION----------------------- This ticket was migrated from Redmine. As such, not all information was able to be captured in the transition. Below is a complete record of the original redmine ticket.

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.

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