6.3.2 HP StoreAll OS Release Notes

and retention, there are other factors considered before autocommit or retention is applied, such as
when the file is created (ctime) and when file content and metadata were last changed (mtime). ctime
is used to determine when autocommit should be applied. Once a decision is made about autocommit,
mtime is used to calculate the retention period.
Autocommit is calculated as follows:
ctime (T) + autocommit (x min) <= current system time = autocommit is
applied
For example, the autocommit period is 10 minutes. If ctime (T) + autocommit (10 min), which is T+10,
and the current time is equal to or greater than T+10, then autocommit is applied.
Data retention is calculated as follows:
mtime + autocommit period + retention period = retention expiration time
If the retention expiration time is greater than the current system time, then the file is retained for the
amount of time that equals retention expiration time minus the current system time. If not, the file is not
retained.
For example:
• A file (a.txt) is created on a non-StoreAll file system (fs1). On fs1, the ctime and mtime both
equal T.
• The a.txt file is copied to a StoreAll file system (fs2) one hour later. On fs2, the ctime is T+1
hour and the mtime is still T.
• fs2 has an autocommit period of 10 minutes and a data retention period of 30 minutes.
When the 10 minute autocommit period has passed (T + 1 hour + 10 min), the copy is autocommitted.
For retention of the file on fs2, the mtime is T, the autocommit period is 10 minutes and the retention
period is 30 minutes:
Mtime (T) + autocommit period (10 min) + retention period (30 min) <
current system time (T + 1 hour + 10 min) = the retention period has
expired
If the retention period has expired at the time autocommit is applied, the file is not retained.
Installation instructions
New installations
HP StoreAll software is preinstalled on supported devices. If you need to reinstall the software, see the
administrator guide for your storage system.
Upgrades
The upgrade procedure is provided in the administrator guide for your storage system. Contact HP
Support for assistance with the procedure.
Compatibility/Interoperability
Note the following:
• Every member of the cluster must be running the same version of HP StoreAll OS software.
• The cluster must include an even number of file serving nodes.
Documentation feedback
HP is committed to providing documentation that meets your needs. To help us improve the
documentation, send any errors, suggestions, or comments to Documentation Feedback
30 Installation instructions