Leap second behavior

| | Comments (0)
Older versions of the linux kernel, such as Centos 5, may be using the host server (the dom0) time. If

/sbin/sysctl xen.independent_wallclock

returns 'xen.independent_wallclock = 0', you are using the time we set. This can be changed by running /sbin/sysctl -w xen.independent_wallclock=1 .

On the CentOS 5 host servers, which is the majority of them, a leap second will be inserted. This is what occurred in 2012 and there were no issues on our end.

On the CentOS 6 host servers, the time is being slewed instead of a leap second being inserted per "Workaround 2" on https://access.redhat.com/articles/199563. These servers are as follows:

field
hill-norton
leake
lefanu

You can check your current dom0 by looking at the result of 'host <guest>.dom0.xen.prgmr.com'.

Leave a comment

About this Entry

This page contains a single entry by srn published on June 30, 2015 11:42 AM.

Downtime on billing starting 21:00 PDT Friday was the previous entry in this blog.

knife down is the next entry in this blog.

Find recent content on the main index or look in the archives to find all content.