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Opened 8 years ago

Last modified 8 years ago

#336 new enhancement

Increase timestamp speed

Reported by: Erik Schnetter Owned by: mthomas
Priority: minor Milestone:
Component: SimFactory Version:
Keywords: Cc:

Description

The current time stamp mechanism in simfactory creates files with a scheme "timestamp-NUMBER", where NUMBER denotes the time. Looking for such files requires iterating over the directory.

Instead, we can use a fixed file name, and use the file creation time as time stamp. (We can additionally write the time stamp into the file, probably in a human readable form.) Accessing this time stamp is a single "stat" operation that should be quicker.

This method has the additional advantage that the time stamps always have the same file name.

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Change History (3)

comment:1 Changed 8 years ago by Frank Löffler

Using the file creation time as a timestamp is prone to errors when the local time on the client on the time on the fileserver (e.g. on nfs) are off a bit. The file creation time is set by the server.

Using a fixed filename with the time in the file would not have that problem.

comment:2 Changed 8 years ago by Erik Schnetter

One can also use touch (or os.utime) to set the file time to the client's time.

comment:3 Changed 8 years ago by Frank Löffler

Component: EinsteinToolkit tracSimFactory
Owner: set to mthomas

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