Time stamp in GPFS log entries

The time stamp in a GPFS™ log entry indicates the time of an event.

In IBM Spectrum Scale™ v4.2.2 and later, you can select either the earlier time stamp format for log entries or the ISO 8601 time stamp format. To select a format, use the mmfsLogTimeStampISO8601 attribute of the mmchconfig command. The default setting is the ISO 8601 log time stamp format.

When you migrate to IBM Spectrum Scale v4.2.2, the time stamp format for the GPFS log is automatically set to the ISO 8601 format. You can prevent this action by including the mmfsLogTimeStampISO8601 attribute when you complete the migration. For more information, see Completing the migration to a new level of IBM Spectrum Scale.

Earlier time stamp format

In IBM Spectrum Scale v4.2.1 and earlier, the time stamp in the GPFS log has the following format:

Www Mmm DD hh:mm:ss.sss YYYY

where

Www

Is a three-character abbreviation for the day of the week.

Mmm

Is a three-character abbreviation for the month.

DD

Is the day of the month.

hh:mm:sec

Is the hours (24-hour clock), minutes, seconds, and milliseconds.

YYYY

Is the year.

The following examples show the earlier time stamp format:

Mon May 09 15:12:20.603 2016
Sun Aug 15 07:04:33.078 2016

ISO 8601 time stamp format

In IBM Spectrum Scale v4.2.2 and later, by default, the time stamp in logs and traces follows a format similar to the ISO 8601 standard:

YYYY-MM-DD_hh:mm:ss.sss±hhmm

where

YYYY-MM-DD

Is the year, month, and day.

_

Is a separator character.

hh:mm:ss.sss

Is the hours (24-hour clock), minutes, seconds, and milliseconds.

±hhmm

Is the time zone designator, in hours and minutes offset from UTC.

The following examples show the ISO 8601 format:

2016-05-09_15:12:20.603-0500
2016-08-15_07:04:33.078+0200