Enabling the auto archiving feature, Sat 29 Sept
This weekend, Sat 29 Sept 2012, we will be enabling the auto archiving feature
on our Hitachi Research storage system (otherwise known as hnas-evs1.campus.bath.ac.uk)
Users should not see any issues as a result of this.
Which users will this affect?
This change will be applied to any Research group that has a research volume on the X drive that is located on hnas-evs1. Currently this is only a small percentage of our overall Research storage. If you wish to ascertain the actual storage location of a Research Folder on the X drive to see which areas are stored on hnas-evs1, you can do so via the DFS tab within the properties of any research folder.
Why are we doing this?
Introducing archiving will allow us to make better use of the optimization and resilience
features of our storage by introducing compression, de-duplication, and site mirroring capabilities
that are built into the Hitachi storage system.
Will I see any problems as a result of this change?
No, we have tested this feature, without observing any issues. If you do see anything
unusual, please let us know via
campus-admins@bath.ac.uk
What will be archived and when?
Any file that is both over 100Kb in size, and has not accessed in the last 60 days will be
archived. The archive job is scheduled to run at 11pm every Saturday evening.
What if I want to open an archived file?
No problem. Simply doubleclick on the stub file, and it will be delivered to the user by the underlying storage system, effectively appearing to the end user to open as normal. Reading a file will also trigger the file to be fully restored (ie moved back) to the live area.
The archiving technology in use is disk to disk, rather than disk to tape. Therefore the recovery time of the archived file, will, in most cases, be the same as if opening a normal unarchived file.
What is a stub file?
When a file is archived, it will leave behind a stub file. The stub file will have the same filename and the same icon as the original file, so will look almost identical to the original file, but will show an offline symbol against it. The stub file will also have an 'O' attribute marked against it (ie when looking at the detailed folder view), indicating it is an offline file.
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